Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71920 CD/HCP4AL

71920 CD/HCP4AL

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		26.1	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	60.5	kN
Basic static load rating	C₀	65.5	kN
Fatigue load limit	P_u	2.55	kN
Attainable speed for grease lubrication		11000	r/min
Attainable speed for oil-air lubrication		17000	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	230	N
Static axial stiffness, preload class A		119	N/µm
Preload class B	G_B	460	N
Static axial stiffness, preload class B		164	N/µm
Preload class C	G_C	920	N
Static axial stiffness, preload class C		232	N/µm
Preload class D	G_D	1840	N
Static axial stiffness, preload class D		340	N/µm
Calculation factors
Calculation factor	f	1.23
Calculation factor	f₁	1
Calculation factor	f_2A	1
Calculation factor	f_2B	1.07
Calculation factor	f_2C	1.12
Calculation factor	f_2D	1.18
Calculation factor	f_HC	1.04
Calculation factor	f₀	16.3

Mass

Mass bearing

0.67

Model Number: 71920 CD/HCP4AL
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：2025-12-09
Application:medical equipment,chamfering machine etc,electrostatic protection,joint protection,spreader series,sanitation facilities,teaching equipment,agriculture,physical instruments,special broaching machine,Laser Devices
Similar models:71920 ACD/HCP4AL S71920 ACD/P4A S71920 CB/HCP4A 71920 ACB/HCP4A 71920 CE/P4AL 71920 ACD/P4A 71920 ACD/P4AL 71920 CE/HCP4AL S71920 ACE/P4A S71920 CD/P4A
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412803	1218	-	-	Seals
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89308 TN	40	78	22	Bearings, units and housings
99346	88.9	97.6376	20.6502	Seals
CRM 22 A	69.85	158.75	34.925	Bearings, units and housings

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