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：2026-04-16
Application:tray industry,food packaging,laser devices,chamfering machine etc,storage shelves,X-ray Equipment,Energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving,heating fans,textile machinery,Industrial,hot and cold box
Similar models:71821 ACD/HCP4 71821 ACD/P4 71821 CD/P4 71821 CD/HCP4
BEARING POWER International Trading Co.,Ltd. specialize in 71821CD/P4 products，there is large inventory of SKF 71821 CD/P4 Angular contact ball bearings, super-precision. We has been built up long-term cooperation with SKF company, could make a bulk order of the 71821 CD/P4 Which SKF 71821CD/P4 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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AS 2035	20	35	1	Bearings, units and housings
FSAF 22215 TLC	75	-	-	Bearings, units and housings
MB 6	30	49	-	Bearings, units and housings
NJ 324 ECML	120	260	55	Bearings, units and housings
NU 210 ECJ	50	90	20	Bearings, units and housings
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Hot number： 26299 6014 NR 7001 CD/P4AH 99231 AOH 241/500 BD-C 4192 K30MB-AOH 24192 D/W RW188-2Z FYTB 1.1/4 LDW NNU 4940 BK/SPW33 NUP 306 ECJ PCM 180185100 M PSM 153030 A51 QJ 213 MA SNL 3040 W 617/4 R