BearingBrain
Parts Intelligence
Part page

NTN W 638/4 X-2Z

Deep groove ball · 2Z shield
Ø4Ø104
Bore
4 mm
Outside dia
10 mm
Width
4 mm
Dynamic C
0.6 kN
Static C0
0.2 kN
Speed grease
130,000 rpm
Speed oil
63,000 rpm
Clearance
CN (Normal)
Precision
ABEC-1 (P0)
Weight
0.002 kg
Evidence

catalog-search · eligible · eval ship · deterministic executor · partsbrain pull 2026-09-08

Interchange family — 8 records

Part numberManufacturerBore×OD×WidthC
W 638/4 X-2ZKOYO (JTEKT)4×10×40.6 kN
W 638/4 X-2ZINA (Schaeffler)4×10×40.6 kN
W 638/4 X-2ZMinebeaMitsumi (NMB)4×10×40.6 kN
W 638/4 X-2ZNachi Fujikoshi4×10×40.6 kN
W 638/4 X-2ZFAG (Schaeffler)4×10×40.6 kN
W 638/4 X-2ZTimken4×10×40.6 kN
W 638/4 X-2ZRBC Bearings4×10×40.6 kN
W 638/4 X-2ZPeer Bearing4×10×40.6 kN