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

71920 CD/P4AH1

Dimensions

d		100	mm
D		140	mm
B		20	mm
d₁		112.3	mm
d₂		112.3	mm
D₁		127.7	mm
K		0.5	mm
C₁		5.46	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		8500	r/min
Attainable speed for oil-air lubrication		14000	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		107	N/µm
Preload class B	G_B	460	N
Static axial stiffness, preload class B		147	N/µm
Preload class C	G_C	920	N
Static axial stiffness, preload class C		209	N/µm
Preload class D	G_D	1840	N
Static axial stiffness, preload class D		306	N/µm
Calculation factors
Calculation factor	f	1.23
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	16.3

Mass

Mass bearing

0.8

Model Number: 71920 CD/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：2025-12-09
Application:cooling system,mathematical instruments,Hydraulic Hose,Optical Instruments,hydraulic actuator,sewage pump,Ball screw,equipment,small appliances,electrostatic protection,Gas turbine
Similar models:71920 ACD/HCP4AH1 71920 ACE/HCP4AH1 71920 CD/P4AH1 71920 CD/HCP4AL S71920 CB/P4A S71920 CE/HCP4A S71920 ACE/HCP4A 71920 CB/HCP4A S71920 CD/HCP4A 71920 CD/P4A
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Hot number： 16692 24128 CCK30/W33 32014 X 7000 CD/P4AH 71904 CE/P4A FNL 516 B FSAF 1515 x 2.3/8 TLC FSAF 22613 FYTWK 30 YTA NA 4840 NU 311 ECM/C3VL0241 OH 30/750 H PRMF 606560 SAFS 22538 x 6.13/16 TLC W 61911