Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71928 CD/HCP4A

71928 CD/HCP4A

Dimensions

d		140	mm
D		190	mm
B		24	mm
d₁		155.4	mm
d₂		155.4	mm
D₁		174.6	mm
r_1,2	min.	1.5	mm
r_3,4	min.	0.6	mm
a		34.2	mm

Abutment dimensions

d_a	min.	147	mm
d_b	min.	147	mm
D_a	max.	183	mm
D_b	max.	186	mm
r_a	max.	1.5	mm
r_b	max.	0.6	mm
d_n		159.5	mm

Calculation data

Basic dynamic load rating	C	95.6	kN
Basic static load rating	C₀	116	kN
Fatigue load limit	P_u	3.9	kN
Attainable speed for grease lubrication		8000	r/min
Attainable speed for oil-air lubrication		12000	r/min
Ball diameter	D_w	15.875	mm
Number of balls	z	29
Reference grease quantity	G_ref	21.6	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	360	N
Static axial stiffness, preload class A		162	N/µm
Preload class B	G_B	720	N
Static axial stiffness, preload class B		223	N/µm
Preload class C	G_C	1440	N
Static axial stiffness, preload class C		317	N/µm
Preload class D	G_D	2880	N
Static axial stiffness, preload class D		467	N/µm
Calculation factors
Calculation factor	f	1.29
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	16.6

Mass

Mass bearing

1.39

Model Number: 71928 CD/HCP4A
Inner Diameter：140mm Outer Diameter：190mm Width：24mm
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：2026-04-18
Application:electrostatic protection,Film machine,Antenna Potentials,Water Monitoring,forming machine,Pneumatic Actuator,vacuum suction cup,experimental equipment,hinge industry,animal anatomy,Vertical pull
Similar models:71928 ACD/HCP4A S71928 ACD/P4A 71928 ACD/P4A S71928 CD/P4A 71928 CD/HCP4AL 71928 CD/P4AL 71928 ACD/P4AH1 71928 ACD/HCP4AL S71928 ACD/HCP4A 71928 ACD/P4AL
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