Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71920 ACE/P4AH1

71920 ACE/P4AH1

Dimensions

d		100	mm
D		140	mm
B		20	mm
d₁		112.4	mm
d₂		109	mm
D₁		127.51	mm
K		0.5	mm
C₁		6.05	mm
r_1,2	min.	1.1	mm
r_3,4	min.	0.6	mm
a		39.2	mm

Abutment dimensions

d_a	min.	106	mm
d_b	min.	103.2	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		115.4	mm

Calculation data

Basic dynamic load rating	C	36.4	kN
Basic static load rating	C₀	30	kN
Fatigue load limit	P_u	1.14	kN
Attainable speed for grease lubrication		11500	r/min
Attainable speed for oil-air lubrication		18000	r/min
Ball diameter	D_w	12.7	mm
Number of balls	z	24
Reference grease quantity	G_ref	10	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	332	N
Static axial stiffness, preload class A		187	N/µm
Preload class B	G_B	996	N
Static axial stiffness, preload class B		280	N/µm
Preload class C	G_C	1990	N
Static axial stiffness, preload class C		367	N/µm
Calculation factors
Calculation factor	f	1.18
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

0.77

Model Number: 71920 ACE/P4AH1
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：2026-06-24
Application:Gripper Swing,electrocardiograph,bag machine,wall materials,plant determination,Textile Accessories,garden machinery,EEG,security equipment,quality inspection equipment,SPA equipment
Similar models:71920 CD/P4AL 71920 CE/HCP4AL 71920 ACE/P4AL 71920 ACB/HCP4AL 71920 ACE/HCP4AH1 71920 CD/HCP4A S71920 ACB/HCP4A 71920 CE/HCP4A 71920 ACD/HCP4AL 71920 ACE/HCP4AL
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Model No. Inner Diameter Outer Diameter Width Type

77540
891/900 M
G 4x8x2 S
NNCF 4912 CV
SAFS 22224

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Model No.	Inner Diameter	Outer Diameter	Width	Type
77540
891/900 M
G 4x8x2 S
NNCF 4912 CV
SAFS 22224