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

W 638/4 X-2RZ

Dimensions

d		4	mm
D		10	mm
B		4	mm
d₁	≈	5.9	mm
D₂	≈	8.8	mm
r_1,2	min.	0.2	mm

Abutment dimensions

d_a	min.	5.6	mm
d_a	max.	5.8	mm
D_a	max.	8.9	mm
r_a	max.	0.2	mm

Calculation data

Basic dynamic load rating	C	0.553	kN
Basic static load rating	C₀	0.245	kN
Fatigue load limit	P_u	0.011	kN
Reference speed		130000	r/min
Limiting speed		63000	r/min
Calculation factor	k_r	0.02
Calculation factor	f₀	12.3

Mass

Mass bearing

0.0013

Model Number: W 638/4 X-2RZ
Inner Diameter：4mm Outer Diameter：10mm Width：4mm
Reference speed:63000 r/min Limiting speed:130000 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:equipment,machining,plant determination,Broadcasting System,Automation,powder metallurgy,coal,industrial skin care,Warehouse Shelf Equipment,Processing machinery,chromatography
Similar models:W 638 W 63805 638/5-2Z W 638/1 SAF 22638 x 6.13/16 TLC W 638/4 X-2Z W 638/4-2RZ W 638/3 R-2Z W 638/3-2RS1 W 638/5 R-2RS1
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Model No.	Inner Diameter	Outer Diameter	Width	Type
1318 K + H 318	80	190	43	Bearings, units and housings
26260	66.675	92.02	6.35	Seals
7044 ACD/HCP4A	220	340	56	Bearings, units and housings
71926 ACD/HCP4AH1	130	180	24	Bearings, units and housings
80x105x10 HMS5 RG	80	105	10	Seals
BK 0408	4	8	8	Bearings, units and housings
HM 30/560	75	-	560	Bearings, units and housings
K 81126 TN	130	170		Bearings, units and housings
NNCF 4860 CV	300	380	80	Bearings, units and housings
P 47 R-15 FM	15	-	-	Bearings, units and housings
SNL 3080 ATURT	380	-	-	Bearings, units and housings
SNW 140x7.1/8	180.975	250.1646	179.959	Bearings, units and housings

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