Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF S71905 ACD/HCP4A

S71905 ACD/HCP4A

Dimensions

d		25	mm
D		42	mm
B		9	mm
d₁		30.6	mm
d₂		30.6	mm
D₂		39.15	mm
r_1,2	min.	0.3	mm
r_3,4	min.	0.2	mm
a		12.4	mm

Abutment dimensions

d_a	min.	27	mm
d_a	max.	30.1	mm
d_b	min.	27	mm
d_b	max.	30.1	mm
D_a	max.	40	mm
D_b	max.	40.6	mm
r_a	max.	0.3	mm
r_b	max.	0.2	mm

Calculation data

Basic dynamic load rating	C	6.37	kN
Basic static load rating	C₀	3.8	kN
Fatigue load limit	P_u	0.16	kN
Attainable speed for grease lubrication		38000	r/min
Ball diameter	D_w	4.762	mm
Number of balls	z	18
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	40	N
Static axial stiffness, preload class A		66	N/µm
Preload class B	G_B	80	N
Static axial stiffness, preload class B		86	N/µm
Preload class C	G_C	160	N
Static axial stiffness, preload class C		112	N/µm
Preload class D	G_D	320	N
Static axial stiffness, preload class D		149	N/µm
Calculation factors
Calculation factor	f	1.07
Calculation factor	f₁	0.98
Calculation factor	f_2A	1
Calculation factor	f_2B	1.07
Calculation factor	f_2C	1.12
Calculation factor	f_2D	1.17
Calculation factor	f_HC	1.04
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

0.038

Model Number: S71905 ACD/HCP4A
Inner Diameter：25mm Outer Diameter：42mm Width：9mm
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：2026-06-24
Application:wall materials,Plastic Equipment,Industrial,flexible processing,Laser Measurements,security equipment,outdoor equipment,casting embedding,medical equipment,instrument,Gas turbine
Similar models:71905 CD/P4A 71905 CE/P4AL S71905 CD/P4A 71905 ACE/P4AH 71905 ACE/HCP4AH 71905 CD/HCP4A S71905 CD/HCP4A S71905 CE/HCP4A 71905 CE/HCP4A S71905 ACE/HCP4A
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Model No. Inner Diameter Outer Diameter Width Type

23936 CC/W33
7312 BECCM
87247
TU 13/16 TF
TU 15/16 TF

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Hot number： 3216 A 6212-2RS1/HC5C3WT 65x110x10 CRW1 R 7038 CD/HCP4A 71915 ACD/HCP4AL 71916 ACB/HCP4A 7224 BGAM 85397 BT4B 328161/HA1 FSAF 1516 x 2.5/8 T HJ 310 EC NCF 18/560 V/HB1 NJG 2311 VH NN 3084 K/SPW33 SY 509 M

Model No.	Inner Diameter	Outer Diameter	Width	Type
23936 CC/W33
7312 BECCM
87247
TU 13/16 TF
TU 15/16 TF