Continental Conveyor & Machine Works limited have been manufacturing bulk material handling equipment to both CEMA and custom specifications in their Thetford Mines plant since 1963. The fully equipped, modern modern fabricating and machining facilities lend themselves well to the production production of high quality, precision engineered products to serve the bulk material handling requirements of today's indus-
try. This catalogue is designed to aid the conveyor pulley user in selecting the proper pulley for their particular application while at the same time allowing the flexibility of the hub system
of their choice, lock" or a.D.
be it the CXTB, Dodge "taper
standard specifications. They are by no means a limit to Continental's abilities in the engineered class applications applications as custom pulleys are designed and fabricated to meet customers individual requirements whenever necessary.
VIEWS
BELOW
SHOW
MANUFACTURING
AND ASSEMBLY
AREA
Above are several views of the manufacturing process of a crowned faced pulley. Initially, the steel rim is rolled to a concentric circle in crown facing rolls specially constructed for the production of conveyor pulleys.
discs are welded to the interior of the rim. Following this operation, the end discs are mounted using a shaft with a continual keyway to assure perfect aligment of the bushing keyways.
Following this operation, end discs are precision flame cut on a specially constructed cutting machine. To assure perfect concentricity, the hub is first mounted in the end disc where upon the entire assembly is then cut to the required diameter. This process assures a negligeable deviation in diameter and thus a more concentric conveyor pulley.
The entire assembly is then hydraulically drawn together and welded to form a concentric drum. In the final welding operation, the pulley is placed on a special machine that turns the pulley at a precise speed, depending on the diameter, to ensure a perfect, high penetration weld between end disc and rim.
Large intermediate
and center discs are used on
The pulley is then meticulously checked and verified to CEMA specifications prior to shipping
Continental welded steel conveyor pulleys are availa~ ble with CXTB, DODGE "taper lock" or O.D. hubs. DETAILS BELOW SHOW DIFFERENCES HUB SYSTEM.
IN CONSTRUCTION
CONTINENTALO.D. HUBS
DEPENDING
ON
Q. D. BUSHING Split cast iron type with 3/4" taper per foot. Shaft keyed to bushing, bushing not keyed to pulley hub, torque transmitted through self locking taper.
CONTINENTALCXTHHUBS
CXTB BUSHING Split taper of either malleable or cast iron type, 2" taper per foot. Shaft keyed to bushing, bushing not keyed to pulley hub. Torque transmitted through bolts.
CONTINENTALDODGEHUBS NO. CK-25 UB
CK-30 CK-35 CK-40 CK-45 CK.50 CK-60 CK-70 CK-80 CK-l00
R*
BUSHIN~ NO.
25'i7 3020 3535 4040 4545 5050 6050 7060 8065 10085
.~BORE~ ~~NG~
1/2" to 2.1/2" dia. 7/S" to 3" dia. 1.3/16" to 3.1/2" dia. 1.7/16" to 4" dia. 1.15/16" to 4.1/2" dia. 2.7/16" to 5" dia. 3.7/16" to 6" dia. 3-15/16" to 7" dia. 4.7/16"toS"dia. 7" to 1 0" dia.
1" 1" 1" 1" 1" 1" 2-1/4" 2-1/4" 2-1/4" 2-1/4"
1-3/4': Z"
3-1/Z" 4"
4-1/Z" 5"
5" 6" 6-1/Z"
8-1/Z"
1/8" 3/8" 1-1/8" 1-1/2" 1-7/8" 2-1/4" 2-5/8" 2-5/8" 2-5/8"
DODGE
"TAPER
LOCK"
Split taper cast iron bushing 80 taper per foot. Shaft keyed to bushing, bushing not keyed to pulley hub. Torque transmitted through bolts.
Continental CXTB hubs
welded steel and bushings.
with
conveyor
The 2" per foot taper of the CXT provide a 12 to 1 locking ratio on the shaft. The advantages of the CXT system are its high lateral holding power and its minimuzation of end disc prestressing. Most torque however is transmitted through the bushing flange and cap screws.
,.-
~~
-juL
BUSHING AND KEYSEAT DIMENSIONS
.Key
furnished
for these sizes only
BUSHINGSPECIFICATIONS
HUBAND CORRESPONDING BUSHING
HUB BOLTTORGUE BUSHING
CXTH25 CXTH30 CXTH35 CXTH40 CXTH45
CXTB25 CXTB30 CXTB35 CXTB40 CXTB45
CXTH50 CXTH60 CXTH70 CXTH80 CXTH10G
i
CXTB50 CXTB60 CXTB70 CXTB80 CXTB100
HUB
in.Ibs.
CXTH25
350 550 840 1200 1680
CXTH30 CXTH35 CXTH40 CXTH45
HUB CXTH60 CXTH60 CXTH70 CXTH80 CXTH100
In.lbs. 3000 4800 7200 9000 9000
Continental welded hubs and bushings.
steel conveyor
pulleys
with a.D.
The 3/4" per foot taper of the 0.0. provides a 32 to 1 locking ratio on the shaft. The advantages of the 0.0. system are its superior holding power in both lateral and torsional directions, its ease of assembly and disassembly and its self locking taper. The large CJp screws provide enough force to lock the taper so that no external keys are required between mating sections.
~ulBUSHINGAND KEYSEATDIMENSIONS
BUSHINGSPECIFICATIONS
HUB CHK CHE CHF
CHJ CHM
in. Ibs. 15
60 75 135 225
HUB
In. IDS.
CHN CHP
300 450 600 750
CHW CHS
The 1-1/2" per foot taper of the "taper lock" provides a 16 to 1 locking ratio on the shaft. The advantages of the Dodge system are its availability, its superior torsional holding power when using a key and its greater load rating due to the small inset that is required.
BUSHINGAND KEYSEATDIMENSIONS
.Key
furnished for these sizes only.
BUSHINGSPECIFICATIONS
HUBANDCORRESPONDING BUSHING
HUBBOLTTOROUE HUB CK CK CK CK
25 30 35 40 45
ft.lbs.
HUB
ft. Ibs.
36 67 84 142 205
CK 50 CK 60
258
CK 70 CK 80 CK 100
652 652 652 1142
./
APPROXIMATE
WEIGHTS
DODGE HUB
n.D. tHK
CXTH35
CK-25 CK-JO CK-J5
CXTH25 CXTH30 CXTH35 CXTH40
CK-25 CK-30 CK-35 CK-40
CHK
CXTH25 CXTH30 CXTH35 CXTH40
CK-25 CK-30 CK-35 CK-40
CXTH25 CXTH30 CXTH35 CXTH40
CK-25 CK-30 CK-35 CK-40
CXTH25 CXTH30 CXTH35 CXTH40
CK-25 CK-30 CK-35 CK-40
CHE CHF
CK-25
CHK
20
CXTH25 CXTH30 CXTH35 CXTH40 CXTH50
24
CXTH25 CXTH30 CXTH35 CXTH40 CXTH50 CXTH60
CK-25 CK-30 CK-35 CK-40 CK-50 CK-60
30
CXTH25 CXTH30 CXTH35 CXTH40 CXTH50 CXTH60
CK-25 CK-JO CK-J5 CK-40 CK-50 CK-60
36
CXTH35 CXTH40 CXTH50 CXTH60 CXTH70 CXTH80
CK-35 CK-40 CK-50 CK-60 CK-70 CK-80
CHE CHF CHM
CXTH40 CXTH50 CXTH60 CXTH70 CXTH80
CK-40 CK-50 CK-60 CK-70 CK-80
CHf CHM
CXTH50 CXTH60 CXTH70 CXTH80
CK-50 CK-60 CK-70 CK-80
CHM
PUllEY' DIA.
Continental
10
12
14
16
18
42
48
.INDICATE S
HUB
CXTH25 CXTH 30
THAT
CK-30 CK-35 CK-40 CK-50
NEXT
HUB--
IN POUNDS FACE WIDTHS IN INCHES 26 30 32 36 38 40
12
14
1& 18
20
22
24
47 51 60
50 54 63
53 57 6&
57 61 70
61 65 74
65 69 78
68 72 81
88
51 61 69 14
62 66 14 18
66 10 18 83
70 74 82 87
74 78 86 91
78 82 90 95
82 86 94 99
90 94 103 107
tHK
64
tHE tHF
68 77 82
69 73 82 87
78 82 91 96
83 87 96
75 79 88 94
80 84 93 99
105
91 95 104 110
97 101 110 115
106 110 119 124
114 118 127 132
122 126 135 140
130 134 143 148
131 135 144 149 170
140
tHE
tHE
CHK tHE tHF CHK
CHE CHF CHM CHK CHE CHF CHM
CHK CHE CHF CHM
122 117 126 126 135 131 140 152 161 113
146 150 155 160
156 160 166 171
213 217 233 258 278 324
229 233 249 274 294
327 392 413
347 415 436
46
51
54
57
139 143 158
5i. 155 165
158
165 169 179
60
63
66
291
302
JOJ JIJ
95
85 89 98
92 96 105
95 102 108
121 131 135
T32 136 145
99 103 112 116
103 101 116 120
111 115 174 128
115 119 128 132
146 150 159 163
161 170 174
172 181 185
93 88 97 92 101 106 108 111
108 118 112 122
123 121 135 181
132 136 144 194
131 141 149 200
175 179 187 207
188 192 200 220
204 220 208 224 234 230 240
102 106 115 121
108 112 121 1271
127 139 131 143 140 152 145
157
144 148 157 162
155 161 159 165 165 174 173.179
203 207 t16 227
218 222 231 242
239 243 251 261
258 262 270 280
314 324
326 330 338 347
138
14ti
172 176 185 189
lBB 196 192 200 201 209 205 213
212 216 225 229
221 225 234 238
229 233 242 246
245 249 258 262
270 274 282 286
290 303 315 327 340 294 307 319 339 352 302 315 317 343 356
369 381 384
153 158 179
149 158 153 162 162 171 167 176 188 197
1681 199 172 203 182 212 186 216 207 237
217, 226 221 230 230 239 234 243 255 264
245 249 258 262 283
254 260 267 271 292
258 268 276 280 301
276 286 294 298 319
306 316 324 328 349
329 339 347 351 372
342 352 360 364 385
167 111 181 188 193 214 260
188 198 192 202 199 210 204 215 225 236 271 282
209 249 213 253 220 262 225 266 246 286 292 332
270 274 284 288 308 354
281 285 295 299 319 365
302 306 316 320 340 386
313 317 327 331 351 397
324
338 342 416 462
346 350 360 364 443 489
385 389 401 404 485 531
412 416 428 431 519 565'
428 443 459 432 447, 477 4151 4931 445 4611 480 496; 448 464 580 600 540 560: 676 696 586 6061 722 142
433 437 453 457 465 511
450 454 470 474 487 533
484 488 504 508 521 567
500 504 520 524 537 583
527 532 537 541 554 600
561 566 571 575 588 634
726 732 738 742 76\1 806
783 789 793 811 851
8061 813 ! 8421 8791 819 849 8831 823 853 901 i 841 871 919! 965 887 917
744 817 890 427 446 551 591 611 651 671 512 537 649 698 722 771 795 819 867 980 533 558 668 717 741 790 814 838 886 998 579 604 712 761 785 834 858 882 930 1040 694 719 821 870 894 943, 967 991 1039 1142 976 1001 1103 1152 1176 122511249 1273 1321 1424
950 1040 1058 1100 1202 1484
9861 1021 1076 1113
1234 1240 1282 1385 1833
1303 1311 1353 1456 1928
1348
1390
1354 1396 1797 1985
1397
1506 1974 1508,1 1976 1610 2070 1950 2168
2082 2084 2178 2276
2147 2149 2243 2341
i.. 78 87 92
86 90
99
101 i
97 101
;10 116
144
171 1771 182 203 249
250 266 291 326 340 372 367 440 461 507
CHP CHW
CHW
151 159 156 164
280 297 314 284 301 318 3001 317 324 325 342 359 360 371 379 406 417! 425
387 464 485 531 646 828
407 488 509 555 670 952
854 899
CHP
142 150
263 261 283 308 343 389
597 625 602 630 649 677 763 791 1045 1083
CHP CHW
LARGER
44
75 79
120
127
399 403 419 423 436 482
86
130 174
328
6~4 680 830 887 915 972 999 1030 659 6811 835 892 921 978 1006 1035 106 134[ 880 937 966 1023 1051 1080 820 848 988 1045 1014 1131 1159 1188 1121 1159 1326 1402 1440 1515 1553 1591
887 919
952 1174 932 964 991 1216 1042 1014 1101 1318 1300 1313 1561
SIZE HUB AND BUSHING
82
1239 1281 1383 1647
1272 1314 1416 1690
1376 1378 1480 1777
1409 1411 1513 1820
1442 1443 1545 1863
157 168
1087 1092 1137 1245 1667
182 190 186 194 195
203
199 207
198 202 211 215 244
216 232 242 252 238 254 264 274
I S USED
When ordering shafting, please specify the following information and if possible include a sketch similar to the one appearing below. This additional data will help elliminate errors.
The shafting specified for use with Continental conveyor pulleys is AISI 1045, a high carbon steel with a tensile strength of approximately 105,000 Ibs. per square inch. This material is particularly well suited for applications requiring high grade transmission as the carbon content makes it one of the strongest steels
162 172
') Diameter and length. 2) Number and sizes of keyway required. 3) Shaft length on either side of the pulley, measured from the edge of rim. 4) Diameter and length of journal if required. Please note that excessive shaft deflection is the main cause of pulley failure. It is therefore recommended that one be generous when selecting shaft sizes. It i also important to remember that while alloy steel
269 273 281 291
280 284 292 302
295 306
360
356 366 374 378 399
1094 1131
368 378 388 392 413
382 392 402 406 427
892 910 914 932 950 996
417 427 437 440 461 523 541 544 651 747 793 983 1001 1005 1021 1039 1085
1057 1093 1128 1149 1185 1221
i 1167 1203 1136 1173 ! 1209 1245 1238 1275 1311 I 1341 1520 1557 1593 162!1
1326 1367 1462 1744
1432 1415 1631 1482 1644
1439
1481 1524 1685
1854
1911
2042
1968 2159 2099 2156 2342
2212 2277 2342 2593 2214 2308 2406
2279 2344 2595 2373 2438 2682 2471 2536 2774
FOR DETERMINING PULLEY AND SHAFT SPECIFICATIONS (Drive and Non-Drive Pulleys)
This quick reference source will enable the reader to select the right pulley and shaf for a conveyor system. It has been prepared and used by experienced pulley engineers who know the importance of preventing conveyor breakdown by properly matching pulleys and shafts to the system. 1. Find the appropriate Horsepower coll:Jmn on Table I. Look down F.P.M. (Feet Per Minute) column until belt speed of conveyor corresponds. Read across to Horsepower column. This number is e (Effective Tension) of conveyor system. Also Te = HP x 33,000 F.P.M. 2. Find the appropriate K factor from Table II. The K factor has to do with the type of Take this K factor x (times) e. This is T 2 or T J (Slack Side Tension) for the conveyor system. T 2 is associated with the Drive Pulley, and T J is associated with the Non-Drive Pulley(s). 3. For Non-Drive Pulley(s), determine the ar in degrees the belt contacts each pulley Then using Table III for each Non-Drive
zontally in the shaft size column. this procedure for each pulley.
7. Next, we divide Tl and T3 by the belt width. This gives us PIW for both the Drive {Tv and Non-Drive (T 3) Pulleys. Then using Table VII, we select a pulley diameter with an allowable PIW greater than our computed PIW for each pulley. 8. Using Table VIII we again select pulley diameter by finding a diameter with maximum shaft size as large or larger than our computed shaft size, doing this for each pulley. 9. Select the larger of the two diameters found in procedure 7 and 8 for each pulley.
Pulley, determine the individual factor for each. Take this factor times J. This gives the resultant load for each Non-Drive Pulley. 4. For Drive Pulley, add T 2 and Te. This equals T1 (Tight Side Tension) for the Drive Pulley. Then divide T1 by T 2' This equals ratio for Table IV. Determine the arc of contact the belt makes with the Drive Pulley. Read down the Ratio Column until corresponding ratio is found; thE:n go across to Arc of Contact Column. Take this new factor times T2. This gives resultant load for the Drive Pulley. 5. From Table V find the desired belt width. Recommended pulley width is given in corresponding column. 6. To determine shaft size, use Table VI (a), or VI (b), (allowable shaft load). The table is computed for Non-Drive Pulleys, (shafts with 8000 psi allowable bending stress). For Drive Pulleys, we multiply allowable load column by 0.75. In effect, this allows 6000 psi stress for Drive Pulleys. Still using Table VI (a or b), we take the bearing centers of the pulley and subtract the face width. This number is used in the "Bearing Centers-(Minus) Face" columns. Next, using the resultant load we go down the "Bearing Centers-(Minus) Face" column until the value for allowable load is greater than our computed resultant load.
We follow
EXAMPLE KNOWN: 100 Horsepower
2100 wrap on head
300 F.P.M.
42" Belt
Head Drive
60" Bearing Centers
Lagged Head Pulley
Browning
Automatic
Hubs
TO
Take-up
or O.D.
FIND:
T 1, T 2 and Resultant Shaft Width
Size
T Load
for
each
for each
Pulley
Pulley
of Pulleys
Diameter
for
each
Pulley
1. From Table I: 100H.P. @ 300 F.P.M.=ll,OOO# 100 x 33,000 (Te). Also 300 -= 11,000#. 2. From Table II: Snubbed Drive, Lagged Drive, Automatic Take-up, K Factor = 0.38. 0.38 11,000# = 4180# (T or 3). 3. The Non-Drive Pulleys have the following degrees of wr?p: Snub: Tail:
30.
Bend No.1:
go.
180.
Bend No.2:
90.
From Table III, the Bend Pulleys have a factor of 1.41422.418Q# x 1.41422 = 5911#. This is the resultant load for the Bend Pulleys. Also from Table III, factor for the Tail and Take-up Pulleys is 2.00000. Therefore, 2.00000 x 4180# = 8360# (resultant). The Snub Pulley has a factor of 0.51764. 4180# x 0.51764 2164# (resultant). 4. For the Drive Pulley, Te + T2=15,180# (TJ. 1 -:- T 2 = 3.63 (ratio). From Table IV using 210. wrap column and 3.63 ratio, we get a new factor of 4.5238 by interpolation. Then take 4.5238 x 4180# = 18,909# (resultant). 5. Since we have a 42" belt we can see from the recommended pulley width in Table V that we should
use a 44" wide
pulley.
6. We have a distance of 16" for bearing centers minus face (60 -44 = 16). With a load of 5911# for the Bend Pulleys, Table 3-15/16" shaft is needed
VilA)
indicates
The Snub Pulley has a resultant of 2164# (16" bearing centers minus face). Use a 27-{6"shaft. .The Tail and Take-up have resultants therefore, 4-7/16" are selected.
of 8360#;
without
dropping
below this
8. By using Table VIII and maximum shaft sizes, we see we need a 24" pulley for the Drive, 14" for the Tail and Take-up; 10" for the Bends, and 6" for the Snub. 9:. Therefore, we would select a 30" Drive (when ttlere is a choice of diameters, always use the largest), 14" Tail and Take-up, 6" Snub and 10" Bends.
NOTE:
It is also
manufacturer's ameters. Even designed facturer lessen
to support may require the
smaller
important
these
If
should this
be followed
instance of width
loads, the
a larger
belt bending
pulley.
to examine
recommendations for though the Continental
factor
their
higher for pulley diameter,
inch
We use a factor of 0.75 for designing the Drive Pulley shaft to 6000 psi. We divide the resultant by this factor. 18,909 -7- 0.75 = 25,212. A 6" shaft with bearing centers minus face of 16" has a load rating of 27697 which is the smallest available
7. T1 = 15,180# (15,180# -7 42" = 361 I b./in.) T3 = 4,180# ( 4,180# + 42" = 100 Ib./in.) Using Table VII, we need a 30" Pulley for the Drive and 6" for the Non-Drive.
to
if a belt
the
belt
pulley diPulley is belt
diameter
manu-
pulley
imposed
to
by the
recommendations
are
their recommendations
prevent rated
belt
damage.
at 440 pounds
In per
were to be used, the manufacturer
would suggest minimums
as follows:
18" Tail, etc.
25,212.
SCHEMATIC FOR TYPICAL CONVEYOR SYSTEM/ PULLEY DIMENSIONAL SYMBOLS
30" for Head,
FACTOR
IIK11
NOTE: For wet belts and smooth lagging, use bare pulley factor. For wet belts and grooved lagging, use lagged pulley factor. If arc of contact is unknown, assume the following: Type of drive Plain TAB
L
E
RESULTANT NOTE:
R = T 3 X Factor
Snubbed
Dual or tandem
LOAD FACTOR-NON-DRIVE
Assumed arc of contact 1800 2100
3800
VI LOADS
TAPER-LOCK (i)HU B
~-
BEARINGCENl
12
'4
MINUS)
16
'/0
LACE '/2
32
30
3:
36
1302 1802 3092 5156 7749 10872 14903 18283 24563 30272 37809 46504 56438 65125 77307 90921 0604:
T!~MA.LE Vi.BELT --
TE/\fSION
PULLEY DIAME1ER
I,
PUI
ES)
DIAME1E. HES}
--
MAXIMUM BELf ENS ION (POU~ DS-P.I.W.)
NOTE: Above tension ratings may be used for any arc of belt contact.
TABLE
Vl
SHAFT SIZES
DATA
REQUIRED
TO DETERMINE
1. Diameter and Face Width
PULLEY SPECIFICATIONS
10. T)o T, or T, (if not
give
2. Crown and Type of Pulley (wing or
(A) Type of Ti .--
3. Unlagged or Lagged (type lagging)
(B) Drive Pulley
4. Shaft Diameter ( if specified)
(C) Drive Pulley Arc ot Contact
5. Hub Size and Type
1D) F.P.M.'
6. Bearing Centers
(E) I-iorsepower
-, .--
foil
c \,
or gravity)
or
Un lagged
(if not known, give the following)
7. Belt Width
(1) T.P.H.
8. Position
(2) Center t o center
of Pulley in the Conveyor or Elevator
the
distance
Continental welded steel wing type self cleaning conveyor and elevator pulleys. Continental Conveyor Wing Pulleys are ruggedly constructed with a heavy center tube taking the direct load from the wing plates and transmitting this load through hubs to the shaft. The sloping wing plates automatically shed the material to each side of the pulley thus preventing build-up on the pulley face which can cause considerable damage to the belt, Welded steel wing type pulleys are recommended for tail shafts of belt conveyors and the boot shaft of bucket elevators. DODGE "TAPER TYPE
HUB
BUSHING
LOCK" -
AND
CXT
l
AND
E
i
l
B
C.D.
BUSHING
'\
.i '\
DIA.
~I-
CONTINENTAL0.0. HUBS HUB
NO.
Q. D. BUSHING
BUSHING
NO.
CH-K
SK
CH.E CH-F CH-J CH-M CH-N CH-P CH.W CH.S
E F J M N P W S
Ill""
10 2-1/2"
dia.
7/8" 10 3.7/16.' dia. 1" 10 3-15/16" dia. 1-7/16" 10 4-1/2" dia. 2" 10 5-1/2" dia. 2-1/2." 10 6" dia. 2-15/16"107"dia. '4-7/16" 10 8-1/2" dil6" 10 10" dia.
3/4"
1.7/S"
1-5/8"
118" 15/16" 1-1/16" 1-9/16" 1-1/4" 1" 1-1/4" 1-3/1"
2-5/S" 3-5/S" 41/2" 6-3/4" S.I/S" 9-3/S" 11-3/8" 15-3/4"
2-5/16" 3-1/4" 4" 2-7/32" 2-1/2" 3" 4-3/18" ~15/18"
Split cast iron type with 3/4" taper per foot. Shaft keyed to bushing, bushing not keyed to pulley hub, torque transmitted through self locking taper.
,.-
CONTINENTAL CXTHHUBS CXTB BUSHING CXTH25 CXTB25 1"102-1116" CXTH30 CXTB30 1-1116" to 2-15/16" CXTH35 CXTB35 1-15/16"103-1116" CXTH40 CXTB40 2-1116"103-15/16" CXTH45 CXTB45 3-1116"104-1116" CXTH50 CXTB50 3-15/16"104-15/16" CXTH60 CXTB60 5-1116" to 6" CXTH10 CXTB10 6-1116" to 1" CXTHBO CXTBBO 11-1/2" to 8" CXTH100!CXTB100 8-1/2" to 10"
CONTINENTAL DODGEHUBS
1-3/16" 1-118" 1-1/16" 2-1/16" 1-13/16" 2-15/32" 1-11/161 2-13/32" 1-1/16" 3-5/16" 2" 3-314" 1-1/16", 4-1/8" 1-1/8" 1-114" 1-3/8"
11/16" 1-1/16" 3/8" 1/8" 1-5/8" 1-1/B" 2" 2-1/2" 2-15/16" 2-13/16"
Split taper of either malleable or cast iron type, 2" taper per foot. Shaft keyed to bushing, bushing not keyed to pulley hub. Torque transmitted through bolts.
DODGE
"TAPER
LOCK"
Split taper cast iron type 1-1/4" taper per foot. Shaft keyed to bushing, bushing not keyed to pulley hub. Torque transmitted through bolts.
FOR DETERMINING PULLEY AND SHAFT SPECIFICATIONS This quick reference source enables the reader to select the proper pulley and shaft for wing applications. It has been prepared and used by experienced pulley engineers who know the importance of preventing conveyor breakdown by properly matching pulleys and shafts to the system. 1. The Effective Tension (Te) for a conveyor system is found in Table I. Locate the appropriate Horsepower column and lo'ok down the F.P.M. (feet per minute) column until belt speed of the conveyor corresponds. Read across to Horsepower column. This number is the Te of the conveyor system. Also Te= HP x 33,000
F.P.M.
2. Find the K factor for the conveyor from Table II. The K factor has to do with the type of driv~ and take-up of the system. Take this K factor x (times) Te. This result is T 3 (Slack side tension) for the conveyor system. 3. Having found the maximum slack side tension (T 3)' divide T 3 by the belt width. This will be the calcul~ed tension in pounds per inch of belt width (P.I.W.). Select a pulley diameter from Table )11 (Wing Pulley Allowable Tensions) which has a P.I.W. rating that is equal to or larger than the calculated
P.I.W.
.
Known:
100 Horsepower
210
Wrap on Head
Pulley 42" Belt ~ 60"Bea rlng Centers on all Pulleys Lagged Head Pulley Automatic Take-up To Find: Te and T Diameter of each Put!ey Width of Pu.1J.eys ResuftantLoad of each PuJley Shaft Size for each Pulley 300 F.P.M Head Drive
1. From Table I: 100 H.P. at 300 F.P.M. =11,OOO# (Te). Also 100 x 33,000 = 11 000# 300 ,.
4. Pulley width in most cases will be the same as that of the drive pulley in the system. (Two inches wider than the belt for belts up to 42" wide; three inches wider than the belt for belts over 42" wide).
2. From Table II: Snubbed Drive, Lagged Drive, Automatic Take-up, K Factor is 0.38. 0.38 x 11,000# = 4180# (T 3)'
5. To calculate the resultant load, first determine the arc in degrees the belt contacts each pulley. Then using Table IV (Resultant Load Factor) find the individual factor for each. Take this factor x (times) T 3. This givesthe resultant load for each of the pulleys in question.
Table III a 16" diameter pulley has a P.I.W. rating equal to for greater than calculted P.I.W. The belting manufacturer's recommendations for minimum pulley diameter must also be considered and the larger of the two should be selected.
6. To determine shaft size, use Table V (Wing Pulley Allowable Shaft Loads). The table is computed for shaft stresses of 6000 psi. For 8000 psi bending stress use a 1.33 multiplier. Still using Table V, take the bearing centers of the pulley and subtract the face width (See Figure 1). This number is used in the "Bearing Centers -(Minus) Face" columns. Next, using the resultant load obtained in step 5 go down the proper "Bearing Centers -(Minus) Face" column until the value for allowable load is greater than the computed resultant load. Select the corresponding shaft listed horizontally in the shaft size column.
3. Slack Side Tension (T 3) divided by belt width is 4180# + 42 = 100 P.I.W. Thus from
4. Since we have a 42" belt we must have a pulley face width two inches wider. Therefore we use a 44" wide pulley. 5. The Non-Drive Pulleys have the following degrees of wrap: Snub: 30' Take-up: 180" Tail: 180" Bends: 90" From Table IV, the Snub Pulley has a factor of 0.51764. 4180# x 0.51764 = 2164#. This is the resultant load for the Snub Pulley. Also from Table IV, factor for the Tail and Take-U is 2.00000, therefore, 4180# x 2.00000 = 8360# (resultant). The Bend Pulleys have a 1.41422 factor. 4180# x 1.41422 = 5911# (resultant). 6. Bearing Centers -(Minus) Face for all pulleys: 60" -(Minus) 44" = 16". From Table V the shaft size for the snub pulley would be 2-11/16" (Allowable Load of 2350# is greater than Calculated Load of2164#). FortheTail and Take-Up a 4-7/16" shaft is required. (9360# being greater than 8360#). For the
EFFECTIVE
FACTOR
TENSION
Te
II KI1
NOTE: For wet belts and smooth lagging, u~.e bare pulley factor. For wet belts and grooved lagging, use lagged p ulley factor. If arc of contact is unknown, assume the following:
Type of drive
Assumed arc of contact
Plain Snubbed Dual or tandem
ALLOWABLE
FOR CXTH; DODGE AND O.D. HUBS
SHAFT
1800 2100 3800
LOADS
IV RESULTANT NOTE:
LOAD FACTOR-NON-DRIVE
R = T 3 X Factor
WING PULLEY
ALLOWABLE
TENSIONS
Allowable Shaft Loads for 6.000 psi Stress (Use Multiplier of 1.33 for 8.000 psi Stress)
VULCANIZED
RUBBER
LAGGING
Vulcanized rubber lagging without cloth fabric i s applied directly to the pulley face by the vulcanizing process. The finished rubber surface has a cloth impression left on it. Lagging is primarily used in conditions that necessitate increasing the tractive capacity of the pulley in drive applications or for resisting abrasive conditions on other pulley applications. Standard lagging is of 60 durometer shore A material and is available in thicknesses of 6, 10, 16, -20 and 25 mm. The tolerances of vulcanized lagging are 4 mm on the rubber thickness. Due to these tolerances, it is therefore possible that a pulley have a high crown, flat or even concave surface at certain points even though the pulley had a perfect crown prior to lagging. The fact that rubber displaces can also have on effect on the crown since in high tension application, certain amount of the crown can be pressed out. If you have an application that requires exact tolerances, we suggest you specify a machined lagged pulley
HERRINGBONE
RUBBER
LAGGING
Herringbone lagging is applied to increase the tractive capacity of the pulley under wet or dirty conditions in which plain lagging would not be sufficient for the task. The herringbone design helps avoid build up of foreign material between the belt and pulley surface thus lowering the belt wear and minimizing alignment problems. The minimum thickness that can be effectively grooved with the herringbone pattern is 10 mm. As with plain lagging, the same rubber specifications and limitations apply. Therefore if exact tolerances are necessary, a machined lagged pulley is advisable.
HOLZ SUDELAG A quality rubber lagging is bonded directly to special traction pads which in turn are fitted to the pulley rim by special retaining bars. This system allows new lagging to be installed on the pulley without removing it from its position on the conveyor.
LAGGED
WING
PULLEYS
A lagged wing pulley is used in cases involving build up of material between the conveyor belt and pulley causing belt misalignment and excessive wear. It can also be used in cases requiring a greater tractive capacity between belt and pulley. The lagged wing pulley principle works as follows. Upon contact with the belt, the rubber on the wing tip compresses, when tension is releived it immediatly returns to its original shape thereby cleaning itself in the process. These wing tip rubber sections are easily replaceable.
SPIRAL.
DRUM
PULLEYS
This unique design reduces belt wear and misalgnment. As with all self cleaning pulleys, rotation automatically starts the cleaning action discharging foreign material to the sides of the conveyor. The Continental spiral drum pulley is formed by a pair of vertical steel flat bars helically wound around a drum, having both begun from the opposite extremities of the pulley and meeting in the middle. There is a uniform pitch to these helices and thus material is uniformly discharged. This design reduces the possibility of material build up between the belt and pulley in application where a self cleaning wing pulley is not practical.
SPIRAL
WING
PULLEYS
The spiral wing pulley is used in applications that necessitate reducing material build up between the belt and pulley while also utilising the wing principle of the self cleaning pulley. The cleaning action begins automatically when rotation begins and material is discharged to both sides of the conveyor. The spiral wing pulley is constructed by helically winding a pair of flat steel bars around the wing pulley; having begun at opposite extremities and r:neeting in the center. This design minimizes belt misalignment afld decreases belt wear. It can be supplied in either flat or crown face in most standard sizes.
\-I
SPECIAL
DRUM
TYPE pULLEYS
Special modifications can be made to standard pulleys in order to suit individual customers needs. To the right we see a pulley modified with retaining rims to assure belt alignment in the head section of a bucket elevator.
Continental will engineer pulleys for any special application that may be required. The pulley shown here to the right necessitated entire stainless steel construction and an entirely open design as it was to come in contact with an acidic bath.
Elevator
pulleys.
Continental welded steel elevator pulleys are manufactured to close tolerances and are designed to withstand high shock loads. A one piece single disc construction is used in which the rim is continuously welded, on both sides, to the center disc. This assures maximum strength with a minimum of deflection. Several models including split type and heavy duty are available in addition to the standard models. An engineered class is also available to suit any application. The standard range of single disc elevator pulleys incorporate either the 0.0. or the CXT hub and bushing systems. These ensure the greatest possible holding power Shaft size must be given careful consideration in the selection of single disc elevator pulleys since the load is concentrated at one particular point on the shaft. As with conventional welded steel conveyor pulleys, a variety of lagging including plain, herringbone and rough top is available.
* 8" FACE DI~
41"
DIAl
ii::I
HUB
0
"" FACE
9" FACE
IWT
0
Iwr
WT
tHK tHE tHF tHJ
3.3/8 2.31/32 2.13/1& 2.19/32
1-7/8 2.5/8 3-5/1 4.1/2
3-3/4 1.15/32 3-13/32 2.5/1& M/I& 2.5/8 1.21/32 2.29/32
54 &0 && 7&
4-3/8 3-31/32 3-13/16 3-19/32
1-1/8 2-5/8 3-5/8 4-1/2
4-3/4 1-15/32 4-13/32 2-5/16 3-8/16 2-5/8 2-29/32 2-29/32
61 61 13 83
tHK tHE tHF tHJ
3-3/8 2.31/32 2.13/1& 2.19/32
1.7/1 2.5/1 3-5/1 4-1/2
3-3/4 1.15/32 3-13/32 2.5/1& M/I& 2.5/8 1.21/32 2.21/32
&3 &8 7 84
4-3/8 3-31/32 3-13/16 3-19/32
1-1/8 2-5/8 3-5/8 4-1/2
4-3/4 1-15/32 4-13/32 2-5/16 3-8/16 2-5/8 2-29/32 2-29/32
10 16 83 92
tHK tHE tHF tHJ
3.11/32 2.15/1& 2-25/32 M/I&
1.7/1 2.5/1 3.5/1 4-1/2
3-25/32 1.15/32 3-7/1& 2.5/1& 2.19/32 2.5/1 1.15/1& 2-29/32
77 82 89 98
4-11/32 3-15/16 3-25/32 3-t/16
1-1/8 2-5/8 3-5/8 4-1/2
4-25/32 1-15/32 85 4-1/16 2-5/16 91 3-19/32 2-5/8 91 2-15/1& 2-29/32 101
tHE tHF tHJ tHM
2.15/1& 2-25/32 2.1/2 2
2.5/8 3-5/1 4-1/2 5-11l
3-7/1& 2.15/1& 11& 2.1913Z 2.5/1 12 2 2.21/32 132 1.11l 3.7/32 164
3-15/16 3-25/32 3-1/2 3
2-5/8 3-5/8 4-1/2 5-1/2
4-1/16 2-5/16 129 3-11/32 2-5/8 135 3 2-29/32 142 2-1/2 3-1/32 178
tHE tHF tHJ tHM
2.21/32 2.3/4 2.1/2 Z
2.5/1 3-5/1 4-11l 5-11l
3.15/32 2.5/1 2 1.11l
181 18& 195 215
3-29/32 3-3/4 3-1/2 3
2-5/8 3-5/8 4-1/2 5-1/2
4-15/32 2-5/16 191 3-5/8 2-5/8 203 3 2-29/32 212 2-1/2 3-1/32 231
tHE tHF tHJ tHM
2.21/32 2.3/4 2.11l 1.15/1&
Z.5/I 3-5/1 4-11l 5-11l
3-15/32 2.5/1& 239 2.5/1 2.5/1 245 2 2.21/32 253 2.1/1& 3.7/32 273
3-29/32 3-3/4 3-1/2 2-15/16
2-5/8 3-5/8 4-1/2 5-1/2
4-15/32 3-5/8 3 3-1/16
tHE tHF tHJ tHM
2.21/32 2.3/4 2.1/2 1.15/1&
1 5/1 3-5/1 4-11l 5-11l
3.15/32 2.5/1& 305 2.5/1 2.5/1 311 2 2-29/32 320 2.1/1& 3-7/32 339
3-29/32 3-3/4 3-1/2 2-15/16
2-5/8 3-5/8 4-1/2 5-1/2
4-15/32 2-5/16 328 3-5/8 2-5/8 334 3 '2-29/32 343 3-1/16 3-1/32 362
13"FACE
HUB
A , .,
C
2.5/1& 2.5/1 2.21/32 3.7/32
2-5/16 2-5/8 2-29/32 3-1/32
259 264 213 293
D 'WI"
CHK CHE CHF CHJ
5-3/8 4-31/32 4-13/16 4-19/32
1-1/8 2-5/8 3-5/8 4-1/2
5-3/4 1-15/3 19 5-13/32 2-5/16 85 4-1/16 2-5/8 91 3-21/32 2-21/32 101
6-3/B 5-31/32 5-13/16 5-19/32
1-7/B 2-5/B 3-5/8 4-1/2
6-3/4 1-15/32 BB 6-13/32 2-5/16 93 5-1/16 2-5/8 100 4-21/32 2-21/32 109
18'1
CHK CHE CHF CHJ
&-7/1 1.7/1 &-15132 2.5/1 &-5/16 3.5/1 &-3132 4-1/2
7.1/4 1.15/32 92 6.29/32 2.5/16 98 &-1116 2.5/1 104 5-13/32 2.21/32 114
5-3/8 4-31/32 4-13/16 4-19/32
1-1/8 2-5/8 3-5/8 4-1/2
5-3/4 5-13/32 4-1/16 3-21/32
1-15/32 91 2-5/16 91 2-5/8 103 2-29/32 113
6-3/B 5-31/32 5-13/16 5-19/32
1-7/8 2-5/B 3-5/8 4-1/2
6-3/4 6-13/32 5-1/16 4-29/32
6.718 1.7/8 &-15132 2-5/8 6.5/16 3-518 6-;;/32 4-1/2
7-1/4 1.15/32 105 &-21/32 2-5/16 111 6-1/16 2.5/1 III 513/32 2-21/32 127
20'1
CHK CHE CHF CHJ
5-11/32 4-15/16 4-25/32 4-1/16
1-1/8 2-5/1 3-5/8 4-1/2
5-25/32 1-15/32 108 5-1/16 2-5/16 114 4-11/32 2-5/1 120 3-15/16 2-21/32 129
6-11/32 5-15/32 5-25/32 5-9/16
1-7/8 2-5/8 3-5/8 4-1/2
6-25/32 1-15/32 119 6-7/16 2-5/11 125 5-11/32 2-5/B 131 4-15/16 2-21/32 140
6.27/32 6.7116 &-9132 6-1/16
17/8 2-5/1 3-5/1 4-1/2
79/32 6-15/16 6.3/32 5-7/16
1.15/32 124 2.5/16 130 2.5/1 136 2.29/32 146
24"1
CHE CHF CHJ CHM
4-15/16 4-25/32 4-1/2 4
2-5/1 3-5/1 4-1/2 5-1/2
5-1/16 2-5/16 142 4-18/32 2-5/8 148 4 2-21/32 158 3-1/2 3-1/32 201
5-15/16 5-25/32 5-1/2 5
2-5/1 3-5/1 4-1/2 5-1/2
6-7/16 2-5/11 156 5-11/32 2-5/8 162 5 2-21/32 171 4-1/2 3-7/32 223
6-7116 2.5/1 &-9132 3-5/1 6 4.112 5.1/2 5.1/2
6-15/16 6-3/32 5.1/2 5
2.5/16 2-5/1 2-29/32 3.'7/32
163 181 178 231
30"1
CHE CHF CHJ CHM
4-29/32 4-3/4 4-1/2 4
Z-5/I 3-5/1 4-1/2 5-1/2
5-15/32 2-5/16 4-5/1 2-5/8 4 2-29/32 3-1/2 3-1/32
234 240 249 268
5-21/32 5-3/4 5-1/2 5
2.5/1 3-5/1 4-1/2 5-1/2
6-15/32 2-5/16 254 5-5/1 2-5/1 259 5 2-21/32 26B 4-1/2 3-7/32 2BB
6-13/321 2-5/1 6.1/4 3-5/8 6 4-1/2 5.1/2 5-112
6.31/32 I 6118 5.1/2 5
25/16 2.5/1 2-29/32 3.7/32
264 269 278 298
36'
CHE CHF CHJ
4-21/32 4-3/4 4-1/2
2-5/1 3-5/1 4-1/2
5-15/32 2-5/16 4-5/1 2-5/8 4 2-21/32
303 301 318
5-21/32 5-3/4 5-1/2
2-5/1 3-5/1 4-1/2
6-15/32 5-5/1 5
&-13/32 1 2-5/1 6.1/4 3-5/1 6 41/2
&-31/321 2.5/16 339 6-1/8 2.5/1 344 5.1/2 2-29/32 353
1-15/32 2-5/16 2-5/8 2-29/32
100 106 113 122
2-5/16 327 2-5/8 333 2-21/32 341
OTHER CONTINENTAL PRODUCTS .Screw
conveyors
.Conveyor .Conveyor .Vibrating .Bucket
pulleys idlers feeders elevators
.Engineered systems .Chain conveyors (En masse)
CONTINENTAL CONVEYOR & MACHINE WORKS L TO.
470 St-Alphonse Steet East Thetford Mines, Quebec Canada G6G 3V8 Tel. (418) 338-4682 Fax (418) 338-4751
CONTINENTALCONVEYOR(ONTARIO)LTD. 100 Richmond Blvd. Napanee, Ontario Canada K7R 383 Tel. (613) 354-3318 Fax (613) 354-5789
