Bearings, units and housings -- Ball bearings -- Deep groove ball bearings -- Deep groove ball bearings -- SKF 4308 ATN9

4308 ATN9

Dimensions

d		40	mm
D		90	mm
B		33	mm
d₁	≈	56.9	mm
D₁	≈	73.1	mm
r_1,2	min.	1.5	mm

Abutment dimensions

d_a	min.	49	mm
D_a	max.	81	mm
r_a	max.	1.5	mm

Calculation data

Basic dynamic load rating	C	55.9	kN
Basic static load rating	C₀	45	kN
Fatigue load limit	P_u	1.9	kN
Reference speed		12000	r/min
Limiting speed		6700	r/min
Calculation factor	k_r	0.06
Calculation factor	f₀	13.8

Mass

Mass bearing

0.95

Model Number: 4308 ATN9
Inner Diameter：40mm Outer Diameter：90mm Width：33mm
Reference speed:6700 r/min Limiting speed:12000 r/min
Type：Bearings, units and housings Ball bearings Deep groove ball bearings Deep groove ball bearings
Details： Deep groove ball bearings
Update date：2026-06-24
Application:Insect Count,Hair styling device,centrifugal pump,rock drilling machinery,casting embedding,oral medical device,Gas turbine,laser devices,safety testing,plastic molding,nail products
Similar models:54308 + U 308 4308 ATN9
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Model No. Inner Diameter Outer Diameter Width Type

45x68x10 HMS5 RG
470851
S71916 ACB/P4A
SIKB 12 F
SSAFS 22530

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Hot number： 26209 80038 7015 CE/P4AL1 718/1000 AMB ALS 32 ABP NJ 314 ECJ NU 212 ECJ PCZ 0508 E RPNA 18/32 SAF 23038 KATLC x 6.15/16 SAW 23230 SAW 23538 x 6.7/8 T SSAFS 22544 x 7.7/8 T STO 35 X SYNT 90 FTS

Model No.	Inner Diameter	Outer Diameter	Width	Type
45x68x10 HMS5 RG
470851
S71916 ACB/P4A
SIKB 12 F
SSAFS 22530