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ID
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Catalog
Deep Groove Ball Bearing
Single row deep groove ball bearing
Single row deep groove ball bearing with filling slot
Stainless steel deep groove ball bearing
Double row deep groove ball bearing
Single row roller cam
Angular Contact Ball Bearing
Single row angular contact ball bearing
Double row angular contact ball bearing
Four-point contact ball bearing
Double row roller cam
Self-aligning Ball Bearing
Self-aligning ball bearing
Sealed self-aligning ball bearing
Self-aligning ball bearing with extended inner ring
Self-aligning ball bearing with adapter sleeve
Cylindrical Roller Bearing
Single row cylindrical roller Bearing
Single row full complement cylindrical roller Bearing
Full complement cylindrical roller Bearing
Tapered Roller Bearing
Metric taper roller Bearing
Inch taper roller bearing
Metric taper roller bearing with flanged outer ring
Matched single row taper roller bearing
Sphercial Roller Bearing
Spherical roller bearing
Sealed spherical roller Bearing
Sphercial roller bearing for vibratory applications
Sphercial roller bearing with adapter sleeve
Sphercial roller bearing with withdrawal sleeve
CARB Toroidal Roller Bearing
CARB toroidal roller bearing
CARB toroidal roller bearing with seals
CARB toroidal roller bearing with adapter sleeve
CARB toroidal roller bearing with withdrawal sleeve
Thrust Ball Bearing
One way thrust ball bearing
One way thrust ball bearing-aligning seat rings
Double way thrust ball bearing
Double way thrust ball bearing-aligning seat rings
Cylindrical Roller Bearing
Cylindrical thrust roller bearing
Sphercial Thrust Roller Bearing
Sphercial thrust roller bearing
Special Bearing
Sealed hybrid deep groove ball bearing
Hybrid deep groove ball bearings
INSOCOAT deep groove ball bearing
INSOCOAT cylindrical roller bearing
High temperature single Row deep groove ball bearing
High temperature Y metric shafts with sunk screw
High temperature Y inch shafts with sunk screw
High temperature Y metric shafts，with Plummer Block Housings
High temperature Y inch shafts，with plummer block housings
High temperature Y metric shafts，with square flanged pillow blocks
High temperature Y inch shafts，with square flanged pillow blocks
High temperature Y metric shafts，with diamond shaped flanged pillow blocks
High temperature Y inch shafts，with diamond shaped flanged pillow blocks
Sensor Bearing Units
Sensor bearing units
Adapater Sleeves
for Metric Shafts
for Inch Shafts
Withdrawal Sleeves
Withdrawal sleeves
Lock Nut
KM(L) lock nut with lock washer
HM lock nut with locking pin
MB lock washer
MS locking button
KMFE lock nut with locking pin
KMT precision lock nut with locking pin
KMTA precision lock nut with locking pin
SNL Pillow Blocks
Bearing with adapter sleeve
Cyindrical bore bearing
Deep Groove Ball Bearing
Stainless steel deep groove ball bearing
> d 1.5-7mm
Product
Structure
Dimension and Parameters
Pu
0.0075
Weight kg
0.001
Designation
W638/4-2Z
Principal dimensions （mm)
d
4
D
9
B
4
Basic load ratings KN
dyc Cr
0.449
stc Cor
0.173
Speed ratings rpm
Speed Ratings
140000
Limiting Speed
70000
Dimensions mm
d
4
d1 ～
5.2
D1 ～
8.1
r 1,2 Min
0.1
Abutment and fillet dimensions mm
d a Min
4.6
Da Max
8.4
r a Max
0.1
Value
k r
0.015
fo
10
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