talks about body in white nomenclature and materials. useful for young engineers
Notes on Ball Bearings Bearing Nomenclature You can learn a lot about a bearing just from its part number. A typical typical bearing is the 6203ZZ bearing. This part number can be divided into its components! 6203 03ZZ ZZ
"hich means! •
Type #ode
•
$eries
•
%ore
•
$uffi&
The type code indicates the type of bearing. 'hile each manufacturer uses their o"n numbers( there are a fe" numbers that could be considered standard in the industry. industry.
Self-Aligning Ball Bearing
)
This *ind of ball bearing has a spherical outer race( allo"ing the a&is of the bearing to +"ander around+. This is important because misalignment is one of the big causes of bearing failure.
2
Spherical Roller Bearing
Double-Row Angular ontact Ball Bearing
3 ,esigned to ta*e a&ial as "ell as radial loads.
Double-Row Ball Bearing
,esigned for heavy radial loads.
!hrust Ball Bearing
/ntended for e&clusively a&ial loads.
Single-Row Deep "roo#e Ball Bearing
6
Typical ball bearing. andles light a&ial loads as "ell as radial loads.
Single-Row Angular ontact Bearing
1 or a&ial one direction only45 as "ell as radial loads.
$elt Seal
To assure that the entire inside edge of the seal touches the inner ring( the inner ring is enlarged. /f a bearing of more normal proportions is re7uired( the outer ring is also enlarged( and the bearing is referred to as a +"ide cup+ bearing.
!apere% Roller Bearing
32
8
This is the *ind of "heel bearings used in cars. The rollers are not cylindrical( but conical. They handle large raidal and a&ial loads.
&nch 'Non-(etric) Bearing
*lin%rical Roller Bearing
:
/nstead of balls( cylindrical rollers are used. These bearings can handle much more radial load( but can handle much less a&ial load( than ball bearings.
9aries
Double-Row Roller Bearing
:: andles greater radial loads than standard cylindrical roller bearings.
Nee%le Roller Bearing
:A
:eedle bearings are basically 9aries roller bearings( but the rollers are much smaller( ma*ing the bearing more compact.
Type 6( +single;ro" deep groove+( is perhaps the most common type of bearing. /f the bearing is an inch bearing the first digit in the number is an 85( then the si
>&tra thin section 9ery thin section >&tra light >&tra light thrust @ight edium eavy
Yes( they go in that order. Botta *eep things simple( you *no". >ach of these series also establishes a relationship bet"een the bore si
The third and fourth digits indicate the bore size in millimeters. >&cept for 0 through 3( the bore si
)0mm )2mm )mm )1mm
/f there is no fourth digit ; for e&le( a 60 bearing( a common roller s*ate bearing ; then the si
$ingle shielded ,ouble shielded $ingle sealed ,ouble sealed $ingle non;contact seal ,ouble non;contact seal ,ouble contact seals $nap ring and groove %rass cage
And then there are the completely off;the;"all bearing numbers( li*e -??02. / have no idea "hat that number is supposed to mean( but it applies to "hat is basically an 8)0;28$ bearing( only a bit thic*er and "ith a groove and snap ring.
+,amples ommon Sate Bearings Number
60 621 6 6?
Bore 'mm) 1
./D/ 'mm) 22 22 )6 )?
i%th 'mm) 1 1 6
All these bearing numbers start "ith 6( "hich tells us theyre Single-row deep groove ball bearings. The second digits tell us the robustness of the bearings. The last t"o( in series and ?( are very thin and light"eight bearings( "hile the first( in series 0( is an
+e&tra light+ bearing "ithout being abnormally thin. The third bearing( in series 2( is the most robust of all( being merely +light+.
