638ZZ Miniature Ball Bearings

The same size can be made of different materials, including,

Stainless Steel Bearings

Chrome Steel Bearings

Carbon Steel Bearings

Ceramic Bearings

Max Load (kgf)
Dyn:460
Stat:200
RPM (x1000):32

Shield / closure: Open Bearing, Z, ZZ, RS, 2RS,TT
Tolerance codes: ABEC-1, ABEC-3, ABEC-5, ABEC-7
Vibration level codes: V4, V3, V2, V1
Internal clearance codes: C2, C3, C4, C5
Material: AISI52100, AISI440C, AISI304, AISI316, Ceramic
Retainer: PTFE, Nylon, PEEK Or Stainless Steel

This bearing can be found with the following part numbers on it:
638-2RS, 638 2RS, 638 RS, 638RS, 638-ZZ, 638 ZZ, 638ZZ, 638 Z
SS638-2RS, SS638 2RS, SS638 RS, SS638RS, SS638-ZZ, SS638 ZZ, SS638ZZ, SS638 Z

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