Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71956 CD/P4A

71956 CD/P4A

Dimensions

d		280	mm
D		380	mm
B		46	mm
d₁		311.8	mm
d₂		311.8	mm
D₁		348.2	mm
r_1,2	min.	2.1	mm
r_3,4	min.	1.1	mm
a		67.4	mm

Abutment dimensions

d_a	min.	291	mm
d_b	min.	291	mm
D_a	max.	369	mm
D_b	max.	374	mm
r_a	max.	2	mm
r_b	max.	1	mm
d_n		319.7	mm

Calculation data

Basic dynamic load rating	C	291	kN
Basic static load rating	C₀	455	kN
Fatigue load limit	P_u	10.6	kN
Attainable speed for grease lubrication		3200	r/min
Attainable speed for oil-air lubrication		4800	r/min
Ball diameter	D_w	30.162	mm
Number of balls	z	31
Reference grease quantity	G_ref	159	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	1090	N
Static axial stiffness, preload class A		266	N/µm
Preload class B	G_B	2180	N
Static axial stiffness, preload class B		363	N/µm
Preload class C	G_C	4360	N
Static axial stiffness, preload class C		509	N/µm
Preload class D	G_D	8720	N
Static axial stiffness, preload class D		741	N/µm
Calculation factors
Calculation factor	f	1.27
Calculation factor	f₁	1
Calculation factor	f_2A	1
Calculation factor	f_2B	1.04
Calculation factor	f_2C	1.09
Calculation factor	f_2D	1.15
Calculation factor	f_HC	1
Calculation factor	f₀	16.7

Mass

Mass bearing

12.9

Model Number: 71956 CD/P4A
Inner Diameter：280mm Outer Diameter：380mm Width：46mm
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:flow control valve,rolling machine,forklift industry,Leather Products,gear type,altimeter etc,Broadcasting System,chemical instruments,rock drilling machinery,Cylinder Micro,defogging and degreasing
Similar models:71956 CD/HCP4A 71956 ACD/HCP4A 71956 ACD/P4A 71956 CD/P4A
BEARING POWER International Trading Co.,Ltd. specialize in 71956CD/P4A products，there is large inventory of SKF 71956 CD/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 71956 CD/P4A Which SKF 71956CD/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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C 30/630 M	630	920	212	Bearings, units and housings
OKCX 310	310		-
PBM 140160160 M1G1	140	160	160	Bearings, units and housings
PSM 303830 A51	30	38	30	Bearings, units and housings
S71917 ACD/HCP4A	85	120	18	Bearings, units and housings
SAW 23526 x 4.3/8 T	111.125	-	-	Bearings, units and housings
SSAFS 22530 TLC	131.7625	-	-	Bearings, units and housings
Z 205	25	-	5	Seals

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Hot number： 2211 EM 294/530 EM 440x470x20 HDS1 R 71964 CDMA/HCP4A 8842 99260 99595 C 4010 TN9 IR 45x50x25.5 K 6x10x13 TN NJ 2313 ECPH OKC 050 QJ 1288 N2MA SAFS 22540 x 7.1/8 YSP 208 SB-2F