Bearings, units and housings -- Ball bearings -- Deep groove ball bearings -- Deep groove ball bearings -- SKF W 638/4-2RZ

W 638/4-2RZ

Dimensions

d		4	mm
D		9	mm
B		4	mm
d₁	≈	5.2	mm
D₂	≈	8.1	mm
r_1,2	min.	0.1	mm

Abutment dimensions

d_a	min.	4.8	mm
d_a	max.	5.1	mm
D_a	max.	8.2	mm
r_a	max.	0.1	mm

Calculation data

Basic dynamic load rating	C	0.364	kN
Basic static load rating	C₀	0.114	kN
Fatigue load limit	P_u	0.005	kN
Reference speed		140000	r/min
Limiting speed		70000	r/min
Calculation factor	k_r	0.02
Calculation factor	f₀	6.5

Mass

Mass bearing

0.001

Model Number: W 638/4-2RZ
Inner Diameter：4mm Outer Diameter：9mm Width：4mm
Reference speed:70000 r/min Limiting speed:140000 r/min
Type：Bearings, units and housings Ball bearings Deep groove ball bearings Deep groove ball bearings
Details： Deep groove ball bearings
Update date：2025-12-09
Application:Plastic Equipment,Laser Measurements,other rubber,hydraulic control element,rubber products machinery and equipment,wall industry,plastic molding,Industrial,Industrial,Industrial Electromechanical,electromagnet
Similar models:W 638/5-2Z W 638/2 X-2Z W 63801-2RS1 W 63800-2RS1 SAF 22638 x 7 TLC W 63804-2RZ W 638/3 R-2Z W 638/4 X-2Z W 63803-2RZ W 63804
BEARING POWER International Trading Co.,Ltd. specialize in W638/4-2RZ products，there is large inventory of SKF W 638/4-2RZ Deep groove ball bearings. We has been built up long-term cooperation with SKF company, could make a bulk order of the W 638/4-2RZ Which SKF W638/4-2RZ is the most authentic, must choose BEARING POWER, what a whole variety, reasonable price, guaranteed quality, prompt delivery via Global express. Any inquiry, never hesitate to E-mail or call +86-022-58519721 to contact us.

Model No.	Inner Diameter	Outer Diameter	Width	Type
105x130x12 HMSA10 V	105	130	12	Seals
11191	28.575	46.43	6.35	Seals
310x350x20 HDS2 D	310	350	20	Seals
8648	22.225	34.93	6.35	Seals
D/W RW168-2Z	6.35	9.525	3.967	Bearings, units and housings
N 1016 KTNHA/SP	80	125	22	Bearings, units and housings
IR 25x30x30	25	30	30	Bearings, units and housings
NJ 308 ECPH	40	90	23	Bearings, units and housings
NKX 45 Z	45	58	32	Bearings, units and housings
SAF 23056 KATLC x 10.1/2	265.1125	-	-	Bearings, units and housings
SAFS 23048 KATLC x 8.7/16	214.3125	-	-	Bearings, units and housings
SSAFS 23038 KATLC x 6.15/16	176.2125	-	-	Bearings, units and housings

Purchase the SKF W 638/4-2RZ Please fill in the following

Hot number： 1300570 52220 593625 7010 CB/HCP4A 99172 C 31/530 M FSYE 2 11/16 N FYR 3 1/2-18 KD10-254 LS 100135 N 39/1320 MB NU 1015 M/C3VL0241 OH 31/1000 H S71922 CB/P4A TUWK 35 LTA