Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71920 ACB/P4A

71920 ACB/P4A

Dimensions

d		100	mm
D		140	mm
B		20	mm
d₁		114.92	mm
d₂		113.16	mm
D₂		128.7	mm
r_1,2	min.	1.1	mm
r_3,4	min.	0.6	mm
a		41.4	mm

Abutment dimensions

d_a	min.	106	mm
d_b	min.	106	mm
D_a	max.	134	mm
D_b	max.	136.8	mm
r_a	max.	1	mm
r_b	max.	0.6	mm
d_n		116.1	mm

Calculation data

Basic dynamic load rating	C	27.6	kN
Basic static load rating	C₀	33.5	kN
Fatigue load limit	P_u	0.815	kN
Attainable speed for grease lubrication		11000	r/min
Attainable speed for oil-air lubrication		17000	r/min
Ball diameter	D_w	7.938	mm
Number of balls	z	37
Reference grease quantity	G_ref	9.96	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	125	N
Static axial stiffness, preload class A		157	N/µm
Preload class B	G_B	250	N
Static axial stiffness, preload class B		202	N/µm
Preload class C	G_C	750	N
Static axial stiffness, preload class C		306	N/µm
Calculation factors
Calculation factor	f	1.11
Calculation factor	f₁	0.99
Calculation factor	f_2A	1
Calculation factor	f_2B	1.02
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

0.85

Model Number: 71920 ACB/P4A
Inner Diameter：100mm Outer Diameter：140mm 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：2026-04-16
Application:Storage Device,reducer,electromyography machine,miscellaneous instruments,animal anatomy,scientific instruments,coal,Low-voltage electrical equipment,hydraulic cylinder buffer,bio-chemical,Other machinery
Similar models:71920 ACE/HCP4A 71920 CD/HCP4A 71920 CB/HCP4A 71920 CD/P4A 71920 ACD/HCP4A S71920 CB/HCP4A S71920 ACE/P4A 71920 CD/P4AL 71920 CE/HCP4AL 71920 ACD/HCP4AH1
BEARING POWER International Trading Co.,Ltd. specialize in 71920ACB/P4A products，there is large inventory of SKF 71920 ACB/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 71920 ACB/P4A Which SKF 71920ACB/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： 24863 305283 DA 32560 33807 34892 4996 50x80x8 CRW1 V 6020-RS1 86175 TQO design LR 15x18x12.5 NU 2317 ECJ RIS 207 A RNA 4914 SYFJ 25 TF