Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF S71921 ACD/P4A

S71921 ACD/P4A

Dimensions

d		105	mm
D		145	mm
B		20	mm
d₁		117.3	mm
d₂		117.3	mm
D₂		135.65	mm
r_1,2	min.	1.1	mm
r_3,4	min.	0.6	mm
a		39.3	mm

Abutment dimensions

d_a	min.	111	mm
d_a	max.	116.7	mm
d_b	min.	111	mm
d_b	max.	116.7	mm
D_a	max.	139	mm
D_b	max.	141	mm
r_a	max.	1	mm
r_b	max.	0.6	mm

Calculation data

Basic dynamic load rating	C	57.2	kN
Basic static load rating	C₀	65.5	kN
Fatigue load limit	P_u	2.5	kN
Attainable speed for grease lubrication		7500	r/min
Ball diameter	D_w	12.7	mm
Number of balls	z	27
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	360	N
Static axial stiffness, preload class A		263	N/µm
Preload class B	G_B	720	N
Static axial stiffness, preload class B		346	N/µm
Preload class C	G_C	1440	N
Static axial stiffness, preload class C		463	N/µm
Preload class D	G_D	2880	N
Static axial stiffness, preload class D		633	N/µm
Calculation factors
Calculation factor	f	1.25
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

0.85

Model Number: S71921 ACD/P4A
Inner Diameter：105mm Outer Diameter：145mm 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:electromagnetic clutch,multi-knife lathe,coupling type,printing equipment,heating fans,equipment,extruder,Seals,Spectrum Products,thin metal materials,relay
Similar models:71921 ACD/HCP4AL 71921 ACD/HCP4AH1 S71921 ACD/HCP4A 71921 ACD/P4AL 71921 CD/HCP4A 71921 ACD/P4AH1 S71921 CD/P4A 71921 CD/P4A 71921 CD/HCP4AH1 71921 CD/HCP4AL
BEARING POWER International Trading Co.,Ltd. specialize in S71921ACD/P4A products，there is large inventory of SKF S71921 ACD/P4A Angular contact ball bearings, super-precision. We has been built up long-term cooperation with SKF company, could make a bulk order of the S71921 ACD/P4A Which SKF S71921ACD/P4A is the most authentic, must choose BEARING POWER, what a whole variety, reasonable price, guaranteed quality, prompt delivery via Global express. Any inquiry, never hesitate to E-mail or call +86-022-58519721 to contact us.

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Hot number： 16012 25x38x7 HMSA10 V 51409 51415 M 6006-2Z 7016 ACE/P4AH1 99465 C 3130 K NJ 1080 MA NJ 2238 ECML NKXR 30 NUP 212 ECM S7008 CD/HCP4A SAF 23034 KA x 5.13/16 W 630/1.5-2Z