Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF S71920 CD/P4A

S71920 CD/P4A

Dimensions

d		100	mm
D		140	mm
B		20	mm
d₁		112.3	mm
d₂		112.3	mm
D₂		130.7	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_a	max.	111.7	mm
d_b	min.	106	mm
d_b	max.	111.7	mm
D_a	max.	134	mm
D_b	max.	136	mm
r_a	max.	1	mm
r_b	max.	0.6	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
Ball diameter	D_w	12.7	mm
Number of balls	z	26
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

0.81

Model Number: S71920 CD/P4A
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：2026-04-16
Application:electronic materials,Forging machine,pipe fittings Steel industry,surgical instruments,Flame Cutting,medical equipment,screen filter,Industry,Industrial,plastic blow molding,Spectrum Products
Similar models:71920 CD/P4A 71920 ACD/HCP4A 71920 ACD/HCP4AH1 71920 ACE/HCP4AL 71920 CB/P4A 71920 CE/P4AH1 71920 ACD/HCP4AL 71920 CD/HCP4AL 71920 CD/HCP4AH1 71920 ACB/HCP4A
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401504	135	-	-	Seals
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Hot number： 16 VS R 216 NR 23038 CC/W33 232/800 CAF/W33 25096 36x50x7 HMS5 V 401806 594 A/592 A 62307-2RS1 C 4192 K30MB L 432348/310 NJ 2312 ECML PSMF 182516 A51 SNW 9x1.1/2 SSAFS 23024 KA x 4.3/16