Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71920 ACD/P4AL

71920 ACD/P4AL

Dimensions

d		100	mm
D		140	mm
B		20	mm
d₁		112.3	mm
d₂		112.3	mm
D₁		127.7	mm
b		2.3	mm
C₁		10.9	mm
C₂		4	mm
C₃		3.3	mm
r_1,2	min.	1.1	mm
r_3,4	min.	0.6	mm
a		38.1	mm

Abutment dimensions

d_a	min.	106	mm
d_b	min.	106	mm
D_a	max.	134	mm
D_b	max.	136	mm
r_a	max.	1	mm
r_b	max.	0.6	mm
d_n		115.6	mm

Calculation data

Basic dynamic load rating	C	57.2	kN
Basic static load rating	C₀	63	kN
Fatigue load limit	P_u	2.4	kN
Attainable speed for grease lubrication		8000	r/min
Attainable speed for oil-air lubrication		13000	r/min
Ball diameter	D_w	12.7	mm
Number of balls	z	26
Reference grease quantity	G_ref	10.5	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	360	N
Static axial stiffness, preload class A		255	N/µm
Preload class B	G_B	720	N
Static axial stiffness, preload class B		336	N/µm
Preload class C	G_C	1440	N
Static axial stiffness, preload class C		449	N/µm
Preload class D	G_D	2880	N
Static axial stiffness, preload class D		613	N/µm
Calculation factors
Calculation factor	f	1.23
Calculation factor	f₁	0.98
Calculation factor	f_2A	1
Calculation factor	f_2B	1.04
Calculation factor	f_2C	1.08
Calculation factor	f_2D	1.14
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

0.8

Model Number: 71920 ACD/P4AL
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：2024-12-13
Application:pump accessories,aerial work platform,Industrial,Pneumatic Control Valves,sterilizers,medical equipment,surgical instruments,food sterilization,root canal filling,Industrial,industrial equipment
Similar models:S71920 ACE/P4A S71920 ACB/HCP4A S71920 ACD/P4A S71920 CE/HCP4A S71920 ACE/HCP4A 71920 CD/P4A 71920 CE/HCP4A S71920 CD/HCP4A 71920 CB/HCP4A 71920 CD/P4AH1
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