Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71921 CD/P4A

71921 CD/P4A

Dimensions

d		105	mm
D		145	mm
B		20	mm
d₁		117.3	mm
d₂		117.3	mm
D₁		132.7	mm
r_1,2	min.	1.1	mm
r_3,4	min.	0.6	mm
a		26.8	mm

Abutment dimensions

d_a	min.	111	mm
d_b	min.	111	mm
D_a	max.	139	mm
D_b	max.	141	mm
r_a	max.	1	mm
r_b	max.	0.6	mm
d_n		120.6	mm

Calculation data

Basic dynamic load rating	C	61.8	kN
Basic static load rating	C₀	69.5	kN
Fatigue load limit	P_u	2.6	kN
Attainable speed for grease lubrication		8500	r/min
Attainable speed for oil-air lubrication		14000	r/min
Ball diameter	D_w	12.7	mm
Number of balls	z	27
Reference grease quantity	G_ref	11.1	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	230	N
Static axial stiffness, preload class A		110	N/µm
Preload class B	G_B	460	N
Static axial stiffness, preload class B		151	N/µm
Preload class C	G_C	920	N
Static axial stiffness, preload class C		215	N/µm
Preload class D	G_D	1840	N
Static axial stiffness, preload class D		316	N/µm
Calculation factors
Calculation factor	f	1.25
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	16.4

Mass

Mass bearing

0.82

Model Number: 71921 CD/P4A
Inner Diameter：105mm Outer Diameter：145mm Width：20mm
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：2025-12-09
Application:Low-voltage electrical equipment,flexible processing,hanging clamp,Seals,electric hydraulic lifting platform,chamfering machine etc,rubber products machinery and equipment,metallurgical mold,Oral Equipment,electrostatic protection,Machine tools
Similar models:S71921 CD/HCP4A S71921 ACD/HCP4A 71921 ACD/P4A S71921 ACD/P4A 71921 CD/HCP4AL 71921 ACD/P4AH1 71921 CD/P4AL 71921 CD/P4A 71921 CD/P4AH1 S71921 CD/P4A
BEARING POWER International Trading Co.,Ltd. specialize in 71921CD/P4A products，there is large inventory of SKF 71921 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 71921 CD/P4A Which SKF 71921CD/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： 16904 32320/DF 7016 CE/P4AH1 99162 ECY 211 KR 52 PPXA OKBS 102 OKBS 90 P 47 R-17 RM PWM 607060 SAF 22640 x 7.1/4 SAFS 22516 x 2.3/4 SHR 70 SNL 3036 SNL 3038 ATURT