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Kaydon part number codes

Reali-Slim MM® metric bearings

Standard and optional Kaydon Reali-Slim MM® metric bearings are marked for complete identification with a 9- or 10-digit part number. Positions 1–9 identify materials, size, type, separator type, and precision. Position 10 (optional) identifies non-standard internal fit, either preload or clearance. Custom and proprietary bearings cannot be identified by code, and are marked only with a 9-digit number.
 

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Position 1 2 3 4 5 6 7 8 9 10
Nomenclature Material Bore (mm) Width (mm) Type Separator Precision Internal fit
Example K 0 8 0 0 8 X P 0 K
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Position 1—Material
J AISI 52100 steel with two seals—Nitrile rubber
K AISI 52100 steel
L AISI 52100 steel and Endurakote® plating
N Endurakote® plating
S AISI 440C stainless steel
W AISI 440C stainless steel with two seals—Nitrile rubber

 

Position 7—Bearing type
A Angular contact
C Radial contact
X Four-point contact

 

Position 8—Separator
P Standard formed ring, "snap-over" type
R Standard formed ring, circular pocket type

 

Position 9—Precision
0 Kaydon precision class 1 (ABEC 1F) standard

 

Position 10—Bearing internal fit
A .0000 to .0127 mm clearance
K .0000 to .0127 mm preload
L .0000 to .0254 mm preload
Z Other clearance or preload not specified above
Empty Standard internal fitup if not specified
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