Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71908 ACD/P4A

71908 ACD/P4A

Dimensions

d		40	mm
D		62	mm
B		12	mm
d₁		47.1	mm
d₂		47.1	mm
D₁		54.9	mm
r_1,2	min.	0.6	mm
r_3,4	min.	0.3	mm
a		18	mm

Abutment dimensions

d_a	min.	43.2	mm
d_b	min.	43.2	mm
D_a	max.	58.8	mm
D_b	max.	60.6	mm
r_a	max.	0.6	mm
r_b	max.	0.3	mm
d_n		48.7	mm

Calculation data

Basic dynamic load rating	C	11.7	kN
Basic static load rating	C₀	8	kN
Fatigue load limit	P_u	0.34	kN
Attainable speed for grease lubrication		18000	r/min
Attainable speed for oil-air lubrication		30000	r/min
Ball diameter	D_w	6.35	mm
Number of balls	z	21
Reference grease quantity	G_ref	1.44	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	70	N
Static axial stiffness, preload class A		89	N/µm
Preload class B	G_B	140	N
Static axial stiffness, preload class B		115	N/µm
Preload class C	G_C	280	N
Static axial stiffness, preload class C		151	N/µm
Preload class D	G_D	560	N
Static axial stiffness, preload class D		199	N/µm
Calculation factors
Calculation factor	f	1.09
Calculation factor	f₁	0.98
Calculation factor	f_2A	1
Calculation factor	f_2B	1.04
Calculation factor	f_2C	1.08
Calculation factor	f_2D	1.14
Calculation factor	f_HC	1
Calculation factor	e	0.68
Calculation factor (single, tandem)	Y₂	0.87
Calculation factor (single, tandem)	Y₀	0.38
Calculation factor (single, tandem)	X₂	0.41
Calculation factor (back-to-back, face-to-face)	Y₁	0.92
Calculation factor (back-to-back, face-to-face)	Y₂	1.41
Calculation factor (back-to-back, face-to-face)	Y₀	0.76
Calculation factor (back-to-back, face-to-face)	X₂	0.67

Mass

Mass bearing

0.11

Model Number: 71908 ACD/P4A
Inner Diameter：40mm Outer Diameter：62mm Width：12mm
Reference speed:- Limiting speed:-
Type：Bearings, units and housings Super-precision bearings Angular contact ball bearings Angular contact ball bearings, super-precision
Details： Angular contact ball bearings, super-precision
Update date：2026-04-16
Application:Special Equipment,extruder,car steering pin,Hair styling device,atomizer class,glass,Textile Accessories,sucker industry,Blood coagulation reagent,ventilation fans,noise inspection
Similar models:S71908 ACB/HCP4A 71908 CE/P4AL 71908 CE/P4A 71908 CE/HCP4A S71908 CB/P4A 71908 ACB/HCP4AL S71908 ACB/P4A 71908 CE/HCP4AL 71908 CB/HCP4AL S71908 ACE/HCP4A
BEARING POWER International Trading Co.,Ltd. specialize in 71908ACD/P4A products，there is large inventory of SKF 71908 ACD/P4A Angular contact ball bearings, super-precision. We has been built up long-term cooperation with SKF company, could make a bulk order of the 71908 ACD/P4A Which SKF 71908ACD/P4A 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.

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Hot number： 331169 E/C500 4303 ATN9 6391/K-6320 7003 CE/P4A 706 CD/P4A 708/1250 AMB 86473 FSAF 1515 x 2.1/2 IR 45x52x22 NATR 5 X NKIA 5902 PCM 16016580 E SAF 22544 x 7.7/8 SAF 22640 x 7.1/8 W 6008-2RS1