Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71821 CD/P4

71821 CD/P4

Dimensions

d		105	mm
D		130	mm
B		13	mm
d₁		113.2	mm
d₂		113.2	mm
D₁		122	mm
r_1,2	min.	1	mm
r_3,4	min.	0.3	mm
a		22.3	mm

Abutment dimensions

d_a	min.	109.6	mm
d_b	min.	109.6	mm
D_a	max.	125.4	mm
D_b	max.	128	mm
r_a	max.	1	mm
r_b	max.	0.3	mm
d_n		114.6	mm

Calculation data

Basic dynamic load rating	C	22.9	kN
Basic static load rating	C₀	30	kN
Fatigue load limit	P_u	1.18	kN
Attainable speed for grease lubrication		9000	r/min
Attainable speed for oil-air lubrication		14000	r/min
Ball diameter	D_w	7.144	mm
Number of balls	z	35
Reference grease quantity	G_ref	4	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	130	N
Static axial stiffness, preload class A		96	N/µm
Preload class B	G_B	390	N
Static axial stiffness, preload class B		167	N/µm
Preload class C	G_C	780	N
Static axial stiffness, preload class C		250	N/µm
Calculation factors
Calculation factor	f	1.44
Calculation factor	f₁	1
Calculation factor	f_2A	1
Calculation factor	f_2B	1.09
Calculation factor	f_2C	1.16
Calculation factor	f_HC	1
Calculation factor	f₀	17.4

Mass

Mass bearing

0.32

Model Number: 71821 CD/P4
Inner Diameter：105mm Outer Diameter：130mm Width：13mm
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：2026-06-25
Application:other accessories,rubber products machinery and equipment,Laser Devices,shoe-making machinery,walking Food processing machinery and equipment,bathroom facilities,tobacco machinery,non-ferrous metal alloy,flow control valve,paint paint,stamping die and its equipment
Similar models:71821 CD/P4 71821 ACD/P4 71821 CD/HCP4 71821 ACD/HCP4
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Model No. Inner Diameter Outer Diameter Width Type

15x40x7 HMS5 V
6218-2RS1
6311-2Z/VA201
NU 10/500 MA
S71922 ACE/HCP4A

Purchase the SKF 71821 CD/P4 Please fill in the following

Hot number： 30651 306674 6218-2RS1 6320 566/563 590 VRME R 619/1700 MB 71926 CD/HCP4AL GEH 45 ES-2LS NJ 2210 ECP KRVE 62 PPA NK 6/12 TN RN-1.5x11.8 BF/G2 T7FC 045T62/DTC10 W 61912-2RS1

Model No.	Inner Diameter	Outer Diameter	Width	Type
15x40x7 HMS5 V
6218-2RS1
6311-2Z/VA201
NU 10/500 MA
S71922 ACE/HCP4A