Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF S71908 ACE/P4A

S71908 ACE/P4A

Dimensions

d		40	mm
D		62	mm
B		12	mm
d₁		46.5	mm
d₂		44.8	mm
D₂		56.5	mm
r_1,2	min.	0.6	mm
r_3,4	min.	0.3	mm
a		18.6	mm

Abutment dimensions

d_a	min.	43.2	mm
d_a	max.	46.1	mm
d_b	min.	42	mm
d_b	max.	44.4	mm
D_a	max.	58.8	mm
D_b	max.	60	mm
r_a	max.	0.6	mm
r_b	max.	0.3	mm

Calculation data

Basic dynamic load rating	C	9.23	kN
Basic static load rating	C₀	5.85	kN
Fatigue load limit	P_u	0.245	kN
Attainable speed for grease lubrication		28000	r/min
Ball diameter	D_w	6.35	mm
Number of balls	z	19
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	84	N
Static axial stiffness, preload class A		78	N/µm
Preload class B	G_B	250	N
Static axial stiffness, preload class B		117	N/µm
Preload class C	G_C	505	N
Static axial stiffness, preload class C		153	N/µm
Calculation factors
Calculation factor	f	1.05
Calculation factor	f₁	0.99
Calculation factor	f_2A	1
Calculation factor	f_2B	1.04
Calculation factor	f_2C	1.07
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: S71908 ACE/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:test equipment,tobacco machinery,power protection,van,stamping die and its equipment,Machine Tool Accessories,Automation,SPA equipment,Air,,electronic materials
Similar models:71908 CB/HCP4AL 71908 CE/HCP4AH1 71908 CE/P4A 71908 CB/P4AL 71908 CE/P4AL 71908 ACD/P4A 71908 ACE/P4AH1 S71908 ACB/P4A 71908 CB/HCP4A S71908 ACD/HCP4A
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25x40x8 HMS5 V	25	40	8	Seals
52204	15	40	26	Bearings, units and housings
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6005/HR22Q2	25	47	12	Bearings, units and housings
62482	158.75	184.2	12.7	Seals
AS 1024	10	24	1	Bearings, units and housings
K 18x24x13	18	24	13	Bearings, units and housings
NU 319 ECP	95	200	45	Bearings, units and housings
OKC 180	180		-
W 63800-2RZ	10	19	7	Bearings, units and housings
YAR 207-105-2F	33.338	72	42.9	Bearings, units and housings

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Hot number： 15620 306-2Z 30x48x8 CRW1 R 31312/DF 7009 CD/HCP4AH 7019 CB/HCP4AL 72805 FSAF 1220 T HE 2324 N 304 ECP OKC 790 QJ 314 N2MA SAF 23032 KAT x 5.7/16 SSAFS 22532 SY 1.11/16 FM