Bearing Handbook

Bearing Handbook for Electric Motors

The world’s best machinery is

SKF Equipped Improve your product’s performance with SKF® engineering and application knowledge, design and testing expertise, and a wide range of solutions. Your customers are continually raising their expectations of product performance and reliability—demanding equipment that consumes less energy, runs quieter, faster and longer, and requires less maintenance. Frequently, this also means lighter, more compact designs. To meet these growing challenges and stay competitive, you need a trusted source of knowledge and application experience to provide you with solutions that work. And for long-term results, you need a working partner that offers one source of responsibility from concept to completion. That source is SKF. Knowledgeable solutions From a position as the world’s leading bearing manufacturer, SKF has evolved to being a provider of cost-effective and knowledgeable solutions. You can take advantage of SKF knowledge through our proprietary services and software to shorten the time required to develop and test your product. SKF knowledge-engineering services, for example, include life calculation analysis, dynamic systems modelling, and 3-dimensional virtual test rigs to simulate and troubleshoot system vibration. SKF product solutions go beyond bearings, housings and seals, to include complete lubrication systems, industry-leading condition monitoring systems, advanced linear and rotary actuation systems, and unique solutions in mechatronics—combining mechanical and electronic elements in a single design. Get SKF Equipped When your product is “SKF Equipped”, it tells your customers that your resources include the best in state-of-the-art technology, and that your products contain some of the very best components available on the market.

The world’s best machinery is

SKF Equipped Improve your product’s performance with SKF® engineering and application knowledge, design and testing expertise, and a wide range of solutions. Your customers are continually raising their expectations of product performance and reliability—demanding equipment that consumes less energy, runs quieter, faster and longer, and requires less maintenance. Frequently, this also means lighter, more compact designs. To meet these growing challenges and stay competitive, you need a trusted source of knowledge and application experience to provide you with solutions that work. And for long-term results, you need a working partner that offers one source of responsibility from concept to completion. That source is SKF. Knowledgeable solutions From a position as the world’s leading bearing manufacturer, SKF has evolved to being a provider of cost-effective and knowledgeable solutions. You can take advantage of SKF knowledge through our proprietary services and software to shorten the time required to develop and test your product. SKF knowledge-engineering services, for example, include life calculation analysis, dynamic systems modelling, and 3-dimensional virtual test rigs to simulate and troubleshoot system vibration. SKF product solutions go beyond bearings, housings and seals, to include complete lubrication systems, industry-leading condition monitoring systems, advanced linear and rotary actuation systems, and unique solutions in mechatronics—combining mechanical and electronic elements in a single design. Get SKF Equipped When your product is “SKF Equipped”, it tells your customers that your resources include the best in state-of-the-art technology, and that your products contain some of the very best components available on the market.

Contents Bearing Beari ng Installation Installation Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2, 3 Speed Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4, 5 6200 620 0 and 6300 6300 Series Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6, 7 N, NJ, NJ, NU 200 200 EC and and 300 300 EC Ser Series ies . . . . . . . . . . . . . . . . 8, 9 Shaft and Housing Diameters 6200 620 0 Series Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6300 630 0 Series Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 N, NJ, NJ, NU 200 EC Ser Series ies . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 N, NJ, NJ, NU 300 EC Ser Series ies . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Shaft Shoulder Dimensions 6200 620 0 Series Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6300 630 0 Series Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Minimum Radial Load N, NJ, NJ, NU 200 EC EC Ser Series ies . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 N, NJ, NJ, NU 300 EC Ser Series ies . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Grease Relube Recommendations 6200 620 0 Series Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 6300 630 0 Series Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 N, NJ, NJ, NU 200 EC EC Ser Series ies . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 N, NJ, NJ, NU 300 EC Ser Series ies . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Vibration Frequencies 6200 Series Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 6300 630 0 Series Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 N, NJ, NJ, NU 200 EC EC Ser Series ies . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 N, NJ, NJ, NU 300 EC Ser Series ies . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 ABMA-SKF ABMA-S KF Product Comparis Comparison on . . . . . . . . . . . . . . . . . . . . . . . 26, 27

Installation tips for maximum bearing operation 1. Handle with care. Never pound directly on a bearing or ring. If a bearing is dropped, it is best not to install it. Store bearings horizontally in a dry place in their original unopened package and never place bearings on a dirty surface; periodically turn over sealed and shielded bearings to prevent grease from settling to one side. 2. Inspect the shaft and housing. Check for size and damage; remove nicks and burrs with emery paper, and wipe clean with a soft cloth. Replace or repair shafts and housings showing obvious signs of wear or damage. A shaft placed in a vise for mounting should be protected from vise jaws with a sheet of soft metal. 3. Avoid overheating. During heat-mounting operations, never bring a flame in direct contact with the bearing and never heat beyond 230°F. Also, immediately hold a heat-mounted bearing in place against the shaft shoulder until it cools and locks in place. Otherwise, the bearing may creep away from the proper position. 4. Use identical replacement bearings. Replacement bearings should be identical to the bearings they replace. Contact an SKF Authorized Distributor or SKF for interchange information. 5. Use the right tool for the job. Induction heaters, oil injection kits, and hydraulic nuts are among the specialized tools available for mounting and dismounting bearings over 4 in. O.D. Their use lowers the possibility of damaging bearings and speeds the process. 6. Pay attention to the bearing’s press fit. Use a press for any bearing under 4 in. O.D. Pressure should be applied only to the bearing ring with the press fit, which is usually the ring that rotates after the bearing is installed. Pressure to the ring without the press fit will damage the raceways.

7. Don’t wash new bearings. Bearing manufacturers take great care to package and ship bearings that are dirt-free and ready for lubrication. There’s usually no need to wash them or remove the protective slushing compound. 8. Proper lube is critical. Bearing manufacturers evaluate several factors before determining the type of lubricant required for specific bearings. Be sure to follow their recommendations. Temperature and contamination conditions will influence the frequency of lubrication changes. 9. Rotate idle bearings. Bearings installed in equipment that is subject to vibration while the shafts are stationary may incur false brinelling damage, which also occurs when equipment is not properly protected during shipment. It can appear as bright, polished depressions on the inner and/or outer races, as well as on the rolling elements. 10. Look for danger signs. Keep alert for three sure signs of improper bearing operation: excessive noise and increases in vibration and temperature. Troubleshooting instruments like hand-held vibration pens, digital thermometers, and electronic stethoscopes help spot bearings in poor operating condition. 11. Find the cause of bearing failures. Bearings are built to last, so frequent failures may point to an installation or lubrication problem. SKF bearing analysis experts can identify the cause of bearing failure and help you prevent it in the future. 12. The contact between the bearing ring and a properly machined and dimensioned bearing seat should not require the use of bonding agents to prevent movement or turning.

Speed ratings There is a speed limit to which rolling bearings can be operated. Generally, it is the operating temperature that can be permitted with respect to the lubricant being used or to the material of the bearing components that sets the limit. The speed at which this limiting bearing temperature is reached depends on the frictional heat generated in the bearing (including any externally applied heat) and the amount of heat that can be transported away from the bearing. Bearing type and size, internal design, load, lubrication and cooling conditions as well as cage design, accuracy and internal clearance all play a part in determining speed capability. In the accompanying tables two speeds are listed: (Thermal) Reference Speed and (Kinematic) Limiting Speed. Warning: The new Reference and Limiting Speeds are not to be used as a direct substitution for the previous Oil and Grease speed ratings. Consult SKF to determine the actual reference speed limit for your operating conditions.

Reference speeds The reference speed for a given bearing represents the permissible operating speed of said bearing when subjected to the specific operating conditions of load, lubrication type and method as outlined in ISO 15312. This standard has been established for oil lubrication but is also valid for grease and uses the following reference conditions: • A temperature increase of 90° F (50° C) above an ambient temperature of 68° F (20° C), (thus a bearing temperature of 158° F (70° C), measured on the bearing stationary outer ring or housing washer. • Radial bearing: a constant radial load, being 5% of the basic static load rating Co. • Thrust bearing: a constant axial load, being 2% of the basic static load rating Co. • Open bearings with Normal clearance. For oil lubricated bearings: • Lubricant: mineral oil without EP-additives having a kinematic viscosity at 158° F (70° C) of: v = 12 mm 2 /s (ISO VG32) for radial bearings, and v = 24 mm2 /s (ISO VG68) for thrust roller bearings • Oil bath with the oil reaching up to the middle of the rolling element in the lowest position. For grease lubricated bearings: • Regular lithium soap grease with mineral base oil having a viscosity of 100 to 200 mm2 /s at 104° F (40° C) (e.g. ISO VG 150). • Filling approximately 30% of the free space in the bearing. The reference speed will be reached after 10 to 20 hours running time. Under these specific conditions the reference speed for oil and grease lubrication will be equal.

Speeds above the reference speed It is possible to operate bearings at speeds above the reference speed if the bearing friction can be reduced, for example by lubrication systems with small, accurately measured quantities of lubricant or when heat can be removed from the bearing by circulating oil lubrication with cooling of the oil, by cooling ribs on the housing, or by directed cooling air streams. Any increase in speed above the reference speed without taking any of these precautions would only cause bearing temperature to rise excessively. An increase of bearing temperature means that lubricant viscosity is lowered and film formation is made more difficult, leading to even higher friction and further temperature increases. If, at the same time, the operational clearance in the bearing is reduced because of increased inner ring temperature, the final consequence would be bearing seizure.

Limiting speeds The speed limit is determined by criteria that include: the stability and or strength of the cage, lubrication of cage guiding surfaces, centrifugal and gyratory forces acting on the rolling elements, and other speed-limiting factors. Experience gained from laboratory tests and practical applications indicates that there are maximum speeds that should not be exceeded for technical reasons or because of the very high costs involved. Limiting Speeds shown in the tables are based on the demands of high speed running applications and are valid only for the specific design and cage design shown in the tables. It is possible to run bearings faster than the limiting speeds, but several factors must be reviewed and improved such as the running accuracy, cage material, lubrication, heat dissipation and design of the bearing. It is therefore advisable to contact SKF Applications Engineering for advice. For enclosed and open bearings using grease lubrication, additional parameters have to be considered such as lubrication of cage guiding surfaces and the shear strength of the lubricant, which is determined by the base oil and thickener. Open balls bearings with low friction typically have Reference Speeds greater than the Limiting Speed. In these cases the permissible speed must be calculated from the operating conditions and the lower value between the permissible and Limiting speed used.

Speed ratings (RPM) Deep groove ball bearings 6200 & 6300 series

Bearing

double sealed limiting r/min

double shielded limiting r/min

open limiting r/min

reference speed r/min

6200 6201 6202 6203 6204

17,000 15,000 13,000 12,000 10,000

28,000 26,000 22,000 19,000 17,000

34,000 32,000 28,000 24,000 20,000

56,000 50,000 43,000 38,000 32,000

6205 6206 6207 6208 6209

8,500 7,500 6,300 5,600 5,000

14,000 12,000 10,000 9,000 8,500

18,000 15,000 13,000 11,000 11,000

28,000 24,000 20,000 18,000 17,000

6210 6211 6212 6213 6214

4,800 4,300 4,000 3,600 3,400

8,000 7,000 6,300 6,000 5,600

10,000 9,000 8,000 7,500 7,000

15,000 14,000 13,000 12,000 11,000

6215 6216 6217 6218 6219

3,200 3,000 2,800 2,600 2,400

5,300 4,800 4,500 4,300 4,000

6,700 6,000 5,600 5,300 5,000

10,000 9,500 9,000 8,500 8,000

6220 6221 6222 6224 6226

2,400 2,200 – – –

3,800 3,600 3,400 3,200 3,000

4,800 4,500 4,300 4,000 3,600

7,500 7,000 6,700 6,300 5,600

6228 6230 6232 6234 6236

– – – – –

– – – – –

3,400 3,200 3,000 3,800 3,600

5,300 5,000 4,500 4,300 4,000

6238 6240

– –

– –

3,400 3,200

3,800 3,600

Warning: The new reference and limiting speeds are not to be used as a direct

substitution for the previous oil and grease speed ratings. See page 4/5 or contact SKF Applications Engineering.

Speed Ratings (RPM) Deep groove ball bearings 6200 & 6300 series

Bearing

double sealed limiting r/min

double shielded limiting r/min

open limiting r/min


6300 6301 6302 6303 6304

15,000 14,000 12,000 11,000 9,500

26,000 22,000 19,000 17,000 15,000

32,000 28,000 24,000 22,000 19,000

50,000 45,000 38,000 34,000 30,000

6305 6306 6307 6308 6309

7,500 6,300 6,000 5,000 4,500

13,000 11,000 9,500 8,500 7,500

16,000 13,000 12,000 11,000 9,500

24,000 20,000 19,000 17,000 15,000

6310 6311 6312 6313 6314

4,300 3,800 3,400 3,200 3,000

6,700 6,300 5,600 5,300 5,000

8,500 8,000 7,000 6,700 6,300

13,000 12,000 11,000 10,000 9,500

6315 6316 6317 6318 6319

2,800 2,600 2,400 2,400 2,200

4,500 4,300 4,000 3,800 3,600

5,600 5,300 5,000 4,800 4,500

9,000 8,500 8,000 7,500 7,000

6320 6321 6322 6324 6326

– – – – –

3,400 3,200 3,000 – –

4,300 4,000 3,800 3,400 3,200

6,700 6,300 6,000 5,600 5,000

6328 6330 6332 6334 6336

– – – – –

– – – – –

4,300 4,000 3,800 3,400 3,200

4,800 4,300 4,000 3,800 3,600

6338

–

–

3,000

3,400

Note: Low-friction seals (2RZ, 2RSL) and double shielded bearings use same speed rat-

ings. Single enclosure (Z, RSL, RZ) and open bearings use the same speed ratings.

Speed ratings (RPM) Cylindrical roller bearings N, NJ, NU 200 EC series

Bearing


limiting speed r/min

202 203 204 205 206

EC EC EC EC EC

22,000 19,000 16,000 14,000 13,000

26,000 22,000 19,000 16,000 14,000

207 208 209 210 211

EC EC EC EC EC

11,000 9,500 9,000 8,500 7,500

12,000 11,000 9,500 9,000 8,000

212 213 214 215 216

EC EC EC EC EC

6,700 6,300 6,000 5,600 5,300

7,500 6,700 6,300 6,000 5,600

217 218 219 220 221

EC EC EC EC EC

4,800 4,500 4,300 4,000 3,800

5,300 5,000 4,800 4,500 4,300

222 224 226 228 230

EC EC EC EC EC

3,600 3,400 3,200 2,800 2,600

4,000 3,600 3,400 3,200 2,800

232 EC 234 EC 236 ECMA 238 ECMA 240 ECMA

2,400 2,400 2,200 2,000 1,900

2,600 2,400 3,200 3,000 2,800

Warning: The new reference and limiting speeds are not to be used as a direct

substitution for the previous oil and grease speed ratings. See page 4/5 or contact SKF Applications Engineering.

Speed ratings (RPM) Cylindrical roller bearings N, NJ, NU 300 EC series

Bearing


limiting speed r/min

303 304 305 306 307

EC EC EC EC EC

15,000 15,000 12,000 11,000 9,500

20,000 18,000 15,000 12,000 11,000

308 309 310 311 312

EC EC EC EC EC

8,000 7,500 6,700 6,000 5,600

9,500 8,500 8,000 7,000 6,700

313 314 315 316 317

EC EC EC EC EC

5,300 4,800 4,500 4,300 4,000

6,000 5,600 5,300 5,000 4,800

318 319 320 321 322

EC EC EC EC EC

3,800 3,600 3,200 3,200 3,000

4,500 4,300 3,800 3,800 3,400

324 326 328 330 332

EC EC EC EC EC

2,800 2,400 2,400 2,200 2,000

3,200 3,000 2,800 3,400 2,400

334 EC 336 EC 338 EC 340 ECMA

1,700 1,600 1,500 1,400

2,200 2,200 2,000 2,400

Shaft and housing diameters Deep groove ball bearings 6200 series

Bearing

bearing bore diameter (mm)

shaft diameter (in.) max. min.

bearing outside diameter (mm)

housing diameter (in.) max. min.

6200 6201 6202 6203 6204

10 12 15 17 20

0.3939 0.4726 0.5908 0.6695 0.7878

0.3936 0.4723 0.5905 0.6692 0.7875

30 32 35 40 47

1.1816 1.2604 1.3786 1.5754 1.8510

1.1811 1.2598 1.3780 1.5748 1.8504

6205 6206 6207 6208 6209

25 30 35 40 45

0.9847 1.1815 1.3785 1.5753 1.7722

0.9844 1.1812 1.3781 1.5749 1.7718

52 62 72 80 85

2.0479 2.4416 2.8353 3.1503 3.3474

2.0472 2.4409 2.8346 3.1496 3.3465

6210 6211 6212 6213 6214

50 55 60 65 70

1.9690 2.1660 2.3628 2.5597 2.7565

1.9686 2.1655 2.3623 2.5592 2.7560

90 100 110 120 125

3.5442 3.9379 4.3316 4.7253 4.9223

3.5433 3.9370 4.3307 4.7244 4.9213

6215 6216 6217 6218 6219

75 80 85 90 95

2.9534 3.1502 3.3472 3.5440 3.7409

2.9529 3.1497 3.3466 3.5434 3.7403

130 140 150 160 170

5.1191 5.5128 5.9065 6.3002 6.6939

5.1181 5.5118 5.9055 6.2992 6.6929

6220 6221 6222 6224 6226

100 105 110 120 130

3.9377 4.1350 4.3318 4.7255 5.1194

3.9371 4.1344 4.3312 4.7249 5.1187

180 190 200 215 230

7.0876 7.4814 7.8751 8.4657 9.0562

7.0866 7.4803 7.8740 8.4646 9.0551

6228 6230 6232 6234 6236

140 150 160 170 180

5.5131 5.9071 6.3012 6.6949 7.0886

5.5124 5.9061 6.3003 6.6940 7.0877

250 270 290 310 320

9.8436 10.6312 11.4186 12.2060 12.5998

9.8425 10.6299 11.4173 12.2047 12.5984

6238 6240

190 200

7.4827 7.8764

7.4815 7.8752

340 360

13.3872 14.1746

13.3858 14.1732

Note: Diameters shown are based on normal loads, operating temperatures, and current

industry fitting practices. See SKF Bearing Installation and Maintenance Guide (#140-710) for specific tolerance classes and corresponding fits.

Shaft and housing diameters Deep groove ball bearings 6300 series

Bearing





6300 6301 6302 6303 6304

10 12 15 17 20

0.3939 0.4726 0.5908 0.6695 0.7878

0.3936 0.4723 0.5905 0.6692 0.7875

35 37 42 47 52

1.3786 1.4573 1.6541 1.8510 2.0472

1.3780 1.4567 1.6535 1.8504 2.0479

6305 6306 6307 6308 6309

25 30 35 40 45

0.9847 1.1815 1.3785 1.5753 1.7722

0.9844 1.1812 1.3781 1.5749 1.7718

62 72 80 90 100

2.4416 2.8353 3.1503 3.5442 3.9379

2.4409 2.8346 3.1496 3.5433 3.9370

6310 6311 6312 6313 6314

50 55 60 65 70

1.9690 2.1660 2.3628 2.5597 2.7565

1.9686 2.1655 2.3623 2.5592 2.7560

110 120 130 140 150

4.3316 4.7253 5.1191 5.5128 5.9065

4.3307 4.7244 5.1181 5.5118 5.9055

6315 6316 6317 6318 6319

75 80 85 90 95

2.9534 3.1502 3.3472 3.5440 3.7409

2.9529 3.1497 3.3466 3.5434 3.7403

160 170 180 190 200

6.3002 6.6939 7.0876 7.4814 7.8751

6.2992 6.6929 7.0866 7.4803 7.8740

6320 6321 6322 6324 6326

100 105 110 120 130

3.9377 4.1350 4.3318 4.7255 5.1194

3.9371 4.1344 4.3312 4.7249 5.1187

215 225 240 260 360

8.4657 8.8594 9.4499 10.2375 11.0249

8.4646 8.8583 9.4488 10.2362 11.0236

6328 6330 6332 6334 6336

140 150 160 170 180

5.5131 5.9071 6.3012 6.6949 7.0886

5.5124 5.9061 6.3003 6.6940 7.0877

300 320 340 360 380

11.8123 12.5998 13.3872 14.1746 14.9620

11.8110 12.5984 13.3858 14.1732 14.9606

6338 6340

190 200

7.4827 7.8764

7.4815 7.8752

400 420

15.7494 16.5370

15.7480 16.5354

Note: Diameters shown are based on normal loads, operating temperatures, and current

industry fitting practices. See SKF Bearing Installation and Maintenance Guide (#140-710) for specific tolerance classes and corresponding fits.

Shaft and housing diameters Cylindrical roller bearings N, NJ, NU 200 EC series

Bearing





202 203 204 205 206

15 17 20 25 30

0.5910 0.6697 0.7878 0.9847 1.1815

0.5906 0.6693 0.7875 0.9844 1.1812

35 40 47 52 55

1.3786 1.5754 1.8510 2.0479 2.4416

1.3780 1.5748 1.8504 2.0472 2.4409

207 208 209 210 211

35 40 47 50 55

1.3785 1.5753 1.7725 1.9693 2.1664

1.3781 1.5749 1.7721 1.9689 2.1659

72 80 85 90 100

2.8353 3.1503 3.3474 3.5442 3.9379

2.8346 3.1496 3.3465 3.5433 3.9370

212 213 214 215 216

60 65 70 75 80

2.3632 2.5601 2.7569 2.9538 3.1506

2.3627 2.5596 2.7564 2.9533 3.1501

110 120 125 130 140

4.3316 4.7253 4.9223 5.1191 5.5128

4.3307 4.7244 4.9213 5.1181 5.5118

217 218 219 220 221

85 90 95 100 105

3.3476 3.5444 3.7413 3.9381 4.1353

3.3470 3.5438 3.7407 3.9375 4.1344

150 160 170 180 190

5.9065 6.3002 6.6939 7.0876 7.4814

5.9055 6.2992 6.6929 7.0866 7.4803

222 224 226 228 230

110 120 130 140 150

4.3321 4.7258 5.1197 5.5134 5.9075

4.3312 4.7249 5.1187 5.5124 5.9066

200 215 230 250 270

7.8751 8.4657 9.0562 9.8436 10.6312

7.8740 8.4646 9.0551 9.8425 10.6299

232 234 236 238 240

160 170 180 190 200

6.3012 6.6949 7.0886 7.4827 7.8764

6.3003 6.6940 7.0877 7.4815 7.8752

290 310 320 340 360

11.4186 12.2060 12.5998 13.3872 14.1746

11.4173 12.2047 12.5984 13.3858 14.1732

Note: Diameters shown are based on normal loads, operating temperatures, and

current industry fitting practices. See SKF Bearing Installation and Maintenance Guide (#140-710) for specific tolerance classes and corresponding fits.

Shaft and housing diameters Cylindrical roller bearings N, NJ, NU 300 EC series

Bearing





302 303 304 305 306

15 17 20 25 30

0.5910 0.6697 0.7878 0.9847 1.1815

0.5906 0.6693 0.7875 0.9844 1.1812

42 47 52 62 72

1.6541 1.8510 2.0479 2.4416 2.8353

1.6535 1.8504 2.0472 2.4409 2.8346

307 308 309 310 311

35 40 45 50 55

1.3785 1.5753 1.7725 1.9693 2.1664

1.3781 1.5749 1.7721 1.9689 2.1659

80 90 100 110 120

3.1503 3.5442 3.9379 4.3316 4.7253

3.1496 3.5433 3.9370 4.3307 4.7244

312 313 314 315 316

60 65 70 75 80

2.3632 2.5601 2.7569 2.9538 3.1506

2.3627 2.5596 2.7564 2.9533 3.1501

130 140 150 160 170

5.1191 5.5128 5.9065 6.3002 6.6939

5.1181 5.5118 5.9055 6.2992 6.6929

317 318 319 320 321

85 90 95 100 105

3.3476 3.5444 3.7413 3.9381 4.1353

3.3470 3.5438 3.7407 3.9375 4.1344

180 190 200 215 225

7.0876 7.4814 7.8751 8.4657 8.8594

7.0866 7.4803 7.8740 8.4646 8.8583

322 324 326 328 330

110 120 130 140 150

4.3321 4.7258 5.1197 5.5134 5.9075

4.3312 4.7249 5.1187 5.5124 5.9066

240 260 280 300 320

9.4499 10.2375 11.0249 11.8123 12.5998

9.4488 10.2362 11.0236 11.8110 12.5984

332 334 336 338 340

160 170 180 190 200

6.3012 6.6949 7.0886 7.4827 7.8764

6.3003 6.6940 7.0877 7.4815 7.8752

340 360 380 400 420

13.3872 14.1746 14.9620 15.7494 16.5370

13.3858 14.1732 14.9606 15.7480 16.5354

Note: Diameters shown are based on normal loads, operating temperatures, and

current industry fitting practices. See SKF Bearing Installation and Maintenance Guide (#140-710) for specific tolerance classes and corresponding fits.

Shoulder dimensions for shafts and housings Deep groove ball bearings 6200 series

d

shaft shoulder da da min. max. in in

D mm

housing shoulder Da Da max. min in in

shaft & housing corner max. in

Bearing

mm

6200 6201 6202 6203 6204

10 12 15 17 20

0.551 0.630 0.748 0.827 0.984

0.571 0.650 0.768 0.847 1.004

30 32 35 40 47

1.024 1.102 1.220 1.417 1.654

0.984 1.062 1.180 1.377 1.614

0.024 0.024 0.024 0.024 0.039

6205 6206 6207 6208 6209

25 30 35 40 45

1.181 1.378 1.634 1.831 2.028

1.201 1.398 1.654 1.851 2.048

52 62 72 80 85

1.850 2.244 2.579 2.894 3.091

1.810 2.204 2.539 2.854 3.051

0.039 0.039 0.039 0.039 0.039

6210 6211 6212 6213 6214

50 55 60 65 70

2.224 2.480 2.677 2.874 3.071

2.244 2.500 2.697 2.894 3.091

90 100 110 120 125

3.287 3.622 4.016 4.409 4.606

3.247 3.582 3.976 4.369 4.566

0.039 0.059 0.059 0.059 0.059

6215 6216 6217 6218 6219

75 80 85 90 95

3.268 3.504 3.701 3.898 4.173

3.288 3.524 3.721 3.918 4.193

130 140 150 160 170

4.803 5.157 5.551 5.945 6.260

4.763 5.117 5.511 5.905 6.220

0.059 0.079 0.079 0.079 0.079

6220 6221 6222 6224 6226

100 105 110 120 130

4.370 4.567 4.764 5.157 5.630

4.410 4.607 4.804 5.197 5.670

180 190 200 215 230

6.654 7.047 7.441 8.031 8.543

6.574 6.967 7.361 7.951 8.463

0.079 0.079 0.079 0.079 0.098

6228 6230 6232 6234 6236

140 150 160 170 180

6.024 6.417 6.811 7.323 7.717

6.064 6.457 6.851 7.363 7.757

250 270 290 310 320

9.331 10.118 10.906 11.575 11.969

9.251 10.038 10.826 11.695 11.889

0.098 0.098 0.098 0.118 0.118

6238 6240

190 200

8.110 8.504

8.150 8.544

340 360

12.756 13.543

12.676 13.463

0.118 0.118

Shoulder dimensions for shafts and housings Deep groove ball bearings 6300 series

d

shaft shoulder da da min. max. in in

D mm

housing shoulder Da Da max. min in in

shaft & housing corner max. in

Bearing

mm

6300 6301 6302 6303 6304

10 12 15 17 20

0.551 0.669 0.787 0.866 1.043

0.571 0.689 0.807 0.886 1.063

35 37 42 47 52

1.220 1.260 1.457 1.654 1.791

1.180 1.220 1.417 1.614 1.751

0.024 0.039 0.039 0.039 0.039

6305 6306 6307 6308 6309

25 30 35 40 45

1.240 1.437 1.693 1.890 2.087

1.260 1.457 1.713 1.910 2.107

62 72 82 90 100

2.185 2.579 2.835 3.228 3.622

2.135 2.539 2.795 3.188 3.582

0.039 0.039 0.059 0.059 0.059

6310 6311 6312 6313 6314

50 55 60 65 70

2.323 2.520 2.795 2.992 3.189

2.343 2.540 2.815 3.012 3.209

110 120 130 140 150

3.976 4.370 4.685 5.079 5.472

3.936 4.330 4.645 5.039 5.432

0.079 0.079 0.079 0.079 0.079

6315 6316 6317 6318 6319

75 80 85 90 95

3.386 3.583 3.858 4.055 4.252

3.406 3.603 3.868 4.075 4.272

160 170 180 190 200

5.866 6.260 6.575 6.969 7.362

5.826 6.220 6.495 6.889 7.282

0.079 0.079 0.098 0.098 0.098

6320 6321 6322 6324 6326

100 105 110 120 130

4.449 4.646 4.843 5.236 5.748

4.489 4.686 4.883 5.276 5.788

215 225 240 260 280

7.953 8.346 8.937 9.724 10.394

7.873 8.266 8.857 9.644 10.314

0.098 0.098 0.098 0.098 0.118

6328 6330 6332 6334 6336

140 150 160 170 180

6.142 6.535 6.929 7.323 7.717

6.182 6.575 6.969 7.363 7.757

300 320 340 360 380

11.181 11.969 12.756 13.543 14.331

11.101 11.889 12.676 13.463 14.251

0.118 0.118 0.118 0.118 0.118

6338 6340

190 200

8.268 8.661

8.308 8.701

400 420

14.961 15.748

14.881 15.668

0.157 0.157

Minimum radial load requirements Cylindrical roller bearings 200 EC series

Bearing

204 205 206 207 208

minimum radial load required @ 900 rpm 1800 rpm 3600 rpm

24 lb. 32 45 62 76

25 lb. 33 48 65 83

27 lb. 36 52 72 93

209 210 211 212 213

92 108 132 160 183

99 116 143 174 211

112 131 164 202 248

214 215 216 217 218

204 225 261 299 339

235 261 307 355 405

280 310 368 429 494

219 220 221 222 224

383 429 514 572 681

463 522 588 658 796

568 648 735

226 228 230 232 234

797 948 1117 1305 1485

938 1126 1340 1585 1803

236 238 240

1646 1872 2117

2025 2321 2646

Note: Minimum radial loads are necessary for satisfactory rolling bearing operation.

This is particularly true for roller bearings running at high speeds, where inertia forces and friction from the lubricant may cause damaging sliding –rather than rolling–movements between the rollers and raceways.

Minimum radial load requirements Cylindrical roller bearings 300 EC series

Bearing

304 305 306 307 308

minimum radial load required @ 900 rpm 1800 rpm 3600 rpm

28 lb. 41 56 72 79

29 lb. 43 59 76 84

31 lb. 46 65 84 95

309 310 311 312 313

115 143 197 216 240

124 156 216 239 266

141 182 254 285 320

314 315 316 317 318

280 322 367 415 467

314 364 417 475 537

382 448 517 593 678

319 320 321 322 324

524 603 670 764 914

606 704 788 907 1097

326 328 330 332 334

1084 1248 1454 1688 1924

1316 1515 1790 2110 2426

336 338 340

2117 2468 2676

2646

Note: Minimum radial loads are necessary for satisfactory rolling bearing operation.

This is particularly true for roller bearings running at high speeds, where inertia forces and friction from the lubricant may cause damaging sliding –rather than rolling–movements between the rollers and raceways.

Grease relube recommendation Deep groove ball bearings 6200 series

Bearing

quantity 900 rpm

interval @ 1800 rpm

3600 rpm

12,200 hr 9,000 8,000 7,000 6,500

6204 6205 6206 6207 6208

.10 oz. .12 oz. .15 oz. .19 oz. .23 oz.

20,000 hr 19,100 18,200 17,300 16,500

14,000 hr 13,500 13,000 12,500 12,000

6209 6210 6211 6212 6213

.25 oz. .28 oz. .33 oz. .38 oz. .43 oz.

16,400 16,250 16,150 16,000 15,600

11,500 11,200 10,500 10,000 9,600

5,900 5,300 4,600 4,000 3,200

6214 6215 6216 6217 6218

.47 oz. .50 oz. .55 oz. .65 oz. .74 oz.

15,200 14,800 14,500 14,400 14,250

9,200 8,800 8,500 8.250 8,000

2,600 2,000 1,500 1,200 900

6219 6220

.84 oz. .95 oz.

14,100 14,000

7,750 7,500

650

Note: The relubrication intervals shown are based on a good quality lithium based

grease at a maximum temperature of 160°F. Reduce the interval by half for each 27°F above 160°F, or for vertical applications. (High temperature greases, like polyurea, can operate for longer periods of time than those listed above.) Lubricate more often in applications where there is a risk of heavy solid and chemical contamination. Consult manufacturer or SKF application engineering for detail s.

LGHP 2 ball and roller bearing grease LGHP 2 is a polyurea-based grease designed for use in electric motors. Unlike many polyurea-based greases, which are inherently noisy during operation, LGHP 2 meets strict SKF noise requirements. Each batch is blended and selected for consistency and adherence to quietness standards. The grease is also recommended for applications where long life is required. With LGHP 2, users can often avoid compatibility problems when relubricating bearings. LGHP 2 is the factory fill grease used in SKF bearings under the designation GXN.

Grease relube recommendation Deep groove ball bearings 6300 series

Bearing

quantity 900 rpm

interval @ 1800 rpm

3600 rpm

12,200 hr 9,000 8,000 7,000 6,500

6304 6305 6306 6307 6308

.12 oz. .16 oz. .21 oz. .26 oz. .32 oz.

20,000 hr 19,100 18,200 17,300 16,500

14,000 hr 13,500 13,000 12,500 12,000

6309 6310 6311 6312 6313

.39 oz. .46 oz. .54 oz. .63 oz. .72 oz.

16,400 16,250 16,150 16,000 15,600

11,500 11,200 10,500 10,000 9,600

5,900 5,300 4,600 4,000 3,200

6314 6315 6316 6317 6318

.81 oz. .92 oz. 1.03 oz. 1.14 oz. 1.26 oz.

15,200 14,800 14,500 14,400 14,250

9,200 8,800 8,500 8,250 8,000

2,600 2,000 1,500 1,200

6319 6320

1.40 oz. 1.57 oz.

14,100 14,000

7,750 7,500


grease at a maximum temperature of 160°F. Reduce the interval by half for each 27°F above 160°F, or for vertical applications. (High temperature greases, like polyurea, can operate for longer periods of time than those listed above.) Lubricate more often in applications where there is a risk of heavy solid and chemical contamination. Consult manufacturer or SKF application engineering for details.

Grease relube recommendation Cylindrical roller bearings N, NJ, NU 200 EC series

Bearing

quantity 900 rpm

interval @ 1800 rpm

3600 rpm

10,000 hr 9,500 9,000 8,500 8,000

5,000 hr 4,500 4,000 3,500 3,000

204 205 206 207 208

.10 oz. .12 oz. .15 oz. .19 oz. .23 oz.

15,000 hr 14,500 14,000 13,500 13,000

209 210 211 212 213

.25 oz. .28 oz. .33 oz. .38 oz. .43 oz.

12,500 12,000 11,500 11,000 10,750

7,500 7,000 6,500 6,000 5,500

2,700 2,400 2,100 1,700 1,400

214 215 216 217 218

.47 oz. .50 oz. .55 oz. .65 oz. .74 oz.

10,500 10,250 10,000 9,500 9,000

5,000 4,500 4,000 3,500 3,000

900 800 700 500 200

219 220

.84 oz. .95 oz.

8,500 8,000

2,500 2,100


grease at a maximum temperature of 160°F. Reduce the interval by half for each 27°F above 160°F, or for vertical applications. (High temperature greases, can operate for longer periods of time than those listed above.) Lubricate more often in applications where there is a risk of heavy solid and chemical contamination. Consult manufacturer or SKF application engineering for details.

Grease relube recommendation Cylindrical roller bearings N, NJ, NU 300 EC series

Bearing

quantity 900 rpm

interval @ 1800 rpm

3600 rpm

10,000 hr 9,500 9,000 8,500 8,000

5,000 hr 4,500 4,000 3,500 3,000

304 305 306 307 308

.12 oz. .16 oz. .21 oz. .26 oz. .32 oz.

15,000 hr 14,500 14,000 13,500 13,000

309 310 311 312 313

.39 oz. .46 oz. .54 oz. .63 oz. .72 oz.

12,500 12,000 11,500 11,000 10,750

7,500 7,000 6,500 6,000 5,500

2,700 2,400 2,100 1,700 1,400

314 315 316 317 318

.81 oz. .92 oz. 1.03 oz. 1.14 oz. 1.26 oz.

10,500 10,250 10,000 9,500 9,000

5,000 4,500 4,000 3,500 3,000

900

319 320

1.40 oz. 1.57 oz.

8,500 8,000

2,500 2,100


grease at a maximum temperature of 160°F. Reduce the interval by half for each 27°F above 160°F, or for vertical applications. (High temperature greases, can operate for longer periods of time than those listed above.) Lubricate more often in applications where there is a risk of heavy solid and chemical contamination. Consult manufacturer or SKF application engineering for details.

SKF vibration data @ 1000 rpm inner ring rotation Deep groove ball bearings 6200 series

Bearing

6200 6201 6202 6203 6204 6205 6206 MRC 6206* 6207 MRC 6207* 6208 6209 MRC 6209* 6210 6211 6212 6213 MRC 6213* 6214 MRC 6214* 6215 MRC 6215* 6216 MRC 6216 6217 MRC 6217 6218 6219 6220 6221 6222 6224 6226 6228 6230 6232

inner ring defect freq.(Hz)

82.540 74.242 82.502 82.449 82.464 90.250 90.530 81.429 90.578 81.503 90.379 99.106 90.633 98.452 98.697 98.119 107.348 98.733 107.338 98.259 107.284 98.334 115.633 98.367 107.082 97.970 107.345 98.309 98.452 98.581 98.696 88.505 88.229 96.902 105.526 114.111

*Old design; no longer produced

outer ring defect freq.(Hz)

cage train freq.(Hz)

50.793 42.424 50.831 50.884 50.870 59.750 59.470 51.904 59.422 51.831 59.621 67.560 59.367 68.214 67.970 68.548 75.986 67.934 75.995 68.408 76.049 68.333 84.367 68.300 76.251 68.696 75.988 68.357 68.214 68.086 67.970 61.495 61.771 69.765 77.808 85.889

6.349 6.061 6.354 6.361 6.359 6.639 6.608 6.488 6.602 6.479 6.625 6.756 6.596 6.821 6.797 6.855 6.908 6.793 6.909 6.841 6.914 6.833 7.031 6.830 6.932 6.870 6.908 6.836 6.821 6.809 6.797 6.833 6.863 6.976 7.073 7.157

ball defect freq.(Hz)

66.030 56.566 66.208 66.456 66.388 78.580 77.039 71.575 76.782 71.183 77.863 84.900 76.488 88.840 87.330 90.980 94.577 87.111 94.637 90.069 94.986 89.590 104.007 89.381 96.304 91.962 94.594 89.745 88.840 88.040 87.333 89.555 91.548 99.649 107.716 115.758

SKF vibration data @ 1000 rpm inner ring rotation Deep groove ball bearings 6300 series

Bearing

6300 6301 6302 6303 6304 6305 6306 6307 MRC 6307* 6308 6309 MRC 6309* 6310 6311 6312 6313 6314 6315 6316 6317 6318 6319 6320 6321 6322 6324 6326 6328 6330




ball defect freq.(Hz)

66.081 66.204 74.472 74.247 73.767 73.755 82.440 82.307 73.632 82.134 82.722 73.025 82.542 82.391 82.267 82.153 82.061 81.980 81.909 81.842 81.786 81.736 82.121 82.061 82.392 81.151 81.122 81.100 90.201

33.919 33.796 42.195 42.419 42.899 42.912 50.894 51.026 43.035 51.199 50.611 43.641 50.792 50.942 51.067 51.180 51.273 51.353 51.424 51.492 51.548 51.598 51.213 51.273 50.941 52.182 52.211 52.233 59.799

5.653 5.633 6.028 6.060 6.128 6.130 6.362 6.378 6.148 6.400 6.326 6.234 6.349 6.368 6.383 6.389 6.409 6.419 6.428 6.436 6.443 6.450 6.402 6.409 6.368 6.523 6.526 6.529 6.644

46.460 46.026 55.633 56.545 58.582 58.637 66.500 67.130 59.179 67.967 65.192 61.976 66.023 66.731 67.325 67.877 68.330 68.729 69.084 69.427 69.711 69.968 68.035 68.330 66.724 73.091 73.252 73.374 78.853

*Old design; no longer produced

SKF vibration data @ 1000 rpm inner ring rotation Cylindrical roller bearings N, NJ, NU 200 EC series

Bearing




roller defect freq.(Hz)

202 203 204 205 206

111.996 112.500 111.887 129.167 129.301

71.337 70.833 71.446 87.500 87.366

6.485 6.439 6.495 6.731 6.720

71.455 69.545 71.879 83.462 82.885

207 208 209 210 211

138.272 137.879 145.992 154.137 163.462

95.062 95.455 104.008 112.530 119.872

6.790 6.818 6.934 7.033 7.051

86.914 88.636 96.443 104.218 105.769

212 213 214 215 216

155.039 154.724 163.240 171.739 171.563

111.628 111.943 120.093 128.261 128.437

6.977 6.996 7.064 7.126 7.135

99.668 101.215 106.906 112.585 113.542

217 218 219 220 222

163.186 163.029 163.951 163.771 163.392

120.148 120.304 119.382 119.563 119.941

7.068 7.077 7.022 7.033 7.055

107.191 108.013 103.331 104.218 106.125

224 226 228 230 232

163.397 163.522 180.838 180.739 180.653

119.936 119.812 135.829 136.928 136.013

7.055 7.048 7.149 7.154 7.159

106.097 105.465 114.893 115.419 115.880

SKF vibration data @ 1000 rpm inner ring rotation Cylindrical roller bearings N, NJ, NU 300 EC series

Bearing




roller defect freq.(Hz)

302 303 304 305 306

94.737 104.037 103.881 112.500 121.359

55.263 62.629 62.785 70.833 78.641

6.140 6.263 6.279 6.439 6.553

58.947 62.943 63.483 69.545 74.470

307 308 309 310 311

120.619 121.212 130.442 129.733 130.367

79.381 78.788 86.224 86.934 86.299

6.615 6.566 6.633 6.687 6.638

77.397 75.036 78.265 81.083 78.555

312 313 314 315 316

129.774 130.314 129.805 130.182 129.828

86.892 86.353 86.862 86.485 86.839

6.684 6.643 6.682 6.653 6.680

80.912 78.761 80.788 79.278 80.693

317 318 319 320 322

139.303 129.770 138.517 130.068 139.077

94.030 86.896 94.816 86.599 94.256

6.716 6.684 6.773 6.661 6.733

82.664 80.928 85.867 79.729 83.563

324 326 328 330 332

129.774 139.211 138.739 138.725 138.889

86.892 94.122 94.595 94.608 94.444

6.684 6.723 6.757 6.758 6.746

80.912 83.029 84.942 84.997 84.325

ABMAdSKF Product number comparison 90

BC

03

J

PP

N

3

0

X

1

2

3

4

5

6

7

8

9

10

6

3

18

2Z

N

2

3

1

5

6

C3

4

symbols ABMA 1.

BA BT

ABMA/5 = SKF exc. 17 = XX03 15 = XX02 12 = XX01 10 = XX00

6XXX XXX 7XXX CD 7XXX CC 7XXX ACD 7XXX B

Conrad maximum capacity angular contact (15°) angular contact (12°) angular contact (25°) angular contact (40°)

Dimension series

00 02 03 04 4.

XX18

Bearing type

BC BL BN

3.

description

Bore diameter

90

2.

SKF

X0XX X2XX X3XX X4XX

extra light light medium heavy

Cage type

X J Y, K M

J Y M

any type pressed steel pressed brass machined brass

5. Seals/shields or duplex mounting

X P E RR UU TT

Z RS,RS1,RSH DB DF DT

character separator

(PP 2Z, two shields) (EE 2RS, two seals) duplex back-to-back duplex face-to-face duplex tandem ’

’

8

7

GJN

10

9

ABMAdSKF Product number comparison 90

BC

03

J

PP

N

3

0

X

1

2

3

4

5

6

7

8

9

10

6

3

18

2Z

N

2

3

1

5

6

C3

4

8

7

symbols ABMA 6.

SKF

description

Snap ring and groove

N A

N NB

G C

NR NBR

groove without ring groove without ring on same side as seal/shield groove with ring groove with ring on same side as seal/shield

7. Radial clearance/preload

8.

0 1 2 3 4 5

C1 C2 C3 C4 C5

normal clearance tighter than C2 tighter than normal looser than normal looser than C3 looser than C4

7 8 9

GA GB GC

light preload medium preload heavy preload

P6 P5 P4 P9A

normal, ABEC1, ISO P7 ABEC 3, ISO P6 ABEC 5, ISO P5 ABEC 7, ISO P4 ABEC 9

Tolerance class

0 6 5 4 2 9

Lubricant

X A

-

any slush or grease refer to manufacturer

10. Special features

X26 X27 X28

S0 S1

(consult SKF Engineering) heat stabilized to 150° C heat stabilized to 200° C

GJN

10

9

Comparative Viscosity Classifications Kinematic viscosities

mm2 /s at 40˚C

2000

Saybolt viscosities

mm2 /s at 100˚C

AGMA grades

SAE grades crankcase oils

SAE grades gear oils

SUS/100˚F

8000

1500 250W

50

1000

40

680

8A

800 140W 30

460

400 320

300

2000

6

1500

220

200

150

60 50 40

4

90W

40W

100 10 9 8 7

5

20

4

30W

600 500 400

68

80W

2

300

20W 46

6

30

3

1000 800

85W

100 80

5

50W

32

1 10W

5W

100 80

10

60

7

50

5 5

3

3

2

2

80 70 60 55 50

150

22

8

4

90

45

75W

70

6

100

200

15 10

200

3000

7

20

300

6000 5000 4000

8

600 500

SUS/210˚F

10000

70 60

1000

ISO VG

40

35 32 Viscosities based on 95 VI single-grade oils. ISO grades are specified at 40˚ C. AGMA grades are specified at 100˚F. SAE 75W, 80W, 85W, and 5 and 10W specified at low temperature (below -17˚F = 0˚C). Equivalent viscosities for 100˚F and 210˚F are shown. SAE 90 to 250 and 20 to 50 specified at 210˚F (100˚C). Comparison of various viscosity classification methods

NOTE: ISO mineral lubricants are recommended over SAE and AGMA lubricants for centrifugal pump applications.

40

Prolong your life The life of your electric motors— with INSOCOAT® bearings from SKF®.

Conventional motor bearings get “fried” by the electrical current passing through them. The result is premature failure and high maintenance costs. The SKF® solution is INSOCOAT® inverter-duty bearings that require no rework prior to mounting. These drop-in replacement bearings feature a coating of aluminum oxide on the inner or outer ring, providing an insulating barrier which prevents electrical current from causing microscopic “melting” of the bearing. In addition, INSOCOAT bearings are treated with a sealant that resists humid environments, heat and chemicals. INSOCOAT bearings are 100% performance tested to 1,000 V DC with a minimum ohmic resistance of 50 MΩ and available for shaft diameters up to 155 mm.

SKF USA Inc.

r d o n t a o M g n i c t i e r l t p c e m l E o , c r y e b v o F c K - S d r h a t h i . , w d e g r g n a c a i d p t e - e i a 6 1 m p 1 a e g e e a t h t l u s f d o o e p s y h i c p s h o t c k g a o n o i t b n e d r g n u o a t e T H r

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ :_ e m a N

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ : _ y _ _ n a : p e m l t i o T C

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ : s s e r d d A

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ : _ _ x _ _ a _ _ F _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ : l : _ e i _ n a _ o m _ _ h _ P E

Complete and return this postage-paid card to schedule a meeting with SKF and to receive a copy of the 116-page hard-cover Electric Motor Handbook.

S E Y E G R D T A A E E A T S L H T S S I T S A O E D N P C M I E T F I O E I N N N U

L I A P , A E L E L I E M V S S S E Y P L R D L U K D A P 3 1 Y . B O D E N I A T P I R M E R B L S E P L I W S L I E G E A M A T S S N O I S A P L S C T S U R I F B

3 4 4 9 1 A P . , C 2 E L N I 3 3 L I A X V S S O U B P L F K O U S P K

Complete and return this postage-paid card to schedule a meeting with SKF and to receive a copy of the 116-page hard-cover Electric Motor Handbook.

Bearing Handbook

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