Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71821 CD/HCP4

71821 CD/HCP4

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		11000	r/min
Attainable speed for oil-air lubrication		16000	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		106	N/µm
Preload class B	G_B	390	N
Static axial stiffness, preload class B		186	N/µm
Preload class C	G_C	780	N
Static axial stiffness, preload class C		278	N/µm
Calculation factors
Calculation factor	f	1.44
Calculation factor	f₁	1
Calculation factor	f_2A	1
Calculation factor	f_2B	1.1
Calculation factor	f_2C	1.18
Calculation factor	f_HC	1.02
Calculation factor	f₀	17.4

Mass

Mass bearing

0.29

Model Number: 71821 CD/HCP4
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：2025-12-09
Application:rolling machine,gear grinding machine,equipment,electromyography machine,engineering machine,preservation equipment,EEG,Flame Cutting,Digital Generator,Gear grinding machine,Wire grinder
Similar models:71821 ACD/P4 71821 CD/P4 71821 CD/HCP4 71821 ACD/HCP4
BEARING POWER International Trading Co.,Ltd. specialize in 71821CD/HCP4 products，there is large inventory of SKF 71821 CD/HCP4 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/HCP4 Which SKF 71821CD/HCP4 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.

Model No.	Inner Diameter	Outer Diameter	Width	Type
24982	63.5	88.9	11.13	Seals
3209 A-2RS1	45	85	30.2	Bearings, units and housings
31309	45	100	27.25	Bearings, units and housings
34x48x8 HMS5 RG	34	48	8	Seals
35x62x8 CRW1 V	35	62	8	Seals
51324 M	120	210	70	Bearings, units and housings
7211 BEGBY	55	100	21	Bearings, units and housings
AH 3138 G	180	190	125	Bearings, units and housings
NU 2312 ECML	60	130	46	Bearings, units and housings
SAFS 22516 T	68.2625	-	-	Bearings, units and housings
SNL 3148 TURT	220	-	-	Bearings, units and housings
W 61707-2RS1	35	44	5	Bearings, units and housings

Purchase the SKF 71821 CD/HCP4 Please fill in the following

Hot number： 13691 527474 6201/HR11QN 6210-ZNR 7420 CBM 99465 C 30/670 KM G 38x48x4 N 318 ECM N 1012 KTNHA/HC5SP NU 2314 ECPH S7012 CE/P4A SAF 22532 x 5.1/2 SNL 3072 W 6002