Bore
K - 1:12 Tapered Bore (Standard for Most Types)
Seal
No Seal
Cage Type
M - Brass Cage
External Modification
W33
Radial Internal Play
C1 Internal Play (Less than C2)
Precision
P5 Precision (Higher than P6)
Heat Stabilization
No Heat Stabilization - Temperatures up to 120 °C
Suffix description
P51Combination Of P5 (Dimensional And Running Accuracy To ISO Tolerance Class 5 (Better Than P6)) And C1 (Radial Clearance And Reduced Levels Of Vibration)
NARadial Clearance For Bearings With Non-Interchangeable Rings (Always After Radial Clearance Symbol e.g. NU215P63 NA)
W33Lubrication Groove And Three Holes In Bearing Outer Ring
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