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

71821 ACD/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		34	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	21.6	kN
Basic static load rating	C₀	28.5	kN
Fatigue load limit	P_u	1.1	kN
Attainable speed for grease lubrication		9500	r/min
Attainable speed for oil-air lubrication		15000	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	200	N
Static axial stiffness, preload class A		244	N/µm
Preload class B	G_B	600	N
Static axial stiffness, preload class B		392	N/µm
Preload class C	G_C	1200	N
Static axial stiffness, preload class C		541	N/µm
Calculation factors
Calculation factor	f	1.44
Calculation factor	f₁	0.97
Calculation factor	f_2A	1
Calculation factor	f_2B	1.09
Calculation factor	f_2C	1.17
Calculation factor	f_HC	1.02
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

0.29

Model Number: 71821 ACD/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:power source,Antenna Industry,lifting equipment Hoisting hoist,glass processing machine,Medical room equipment,Tool,Industrial,oral medical device,chamfer,special broaching machine,equipment and
Similar models:71821 CD/P4 71821 ACD/P4 71821 CD/HCP4 71821 ACD/HCP4
BEARING POWER International Trading Co.,Ltd. specialize in 71821ACD/HCP4 products，there is large inventory of SKF 71821 ACD/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 ACD/HCP4 Which SKF 71821ACD/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
140 VS R	126	-	-	Seals
20148	50.8	92.02	6.35	Seals
68x90x10 HMSA10 RG	68	90	10	Seals
970 VE R	932	-	-	Seals
FYE 1 11/16 N	42.8625	-	-	Bearings, units and housings
BT4B 328564/HA4	419.1	590.64	-	Bearings, units and housings
FBSA 206/DB	30	-	120	Bearings, units and housings
NJ 222 ECM	110	200	38	Bearings, units and housings
OKBS 64	64	-	-
PCM 909560 E	90	95	60	Bearings, units and housings
SA 70 ESX-2LS	70	-	49	Bearings, units and housings
SAF 22510 x 1.5/8 T	41.275	-	-	Bearings, units and housings

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

Hot number： 1425 VE R 16245 22332-2CS5/VT143 241/500 ECA/W33 313528 C 6201-Z 6306/HR11TN 65x100x10 HMS5 V 87069 BT4B 332078/HA4 ECCN 050 R H 3124 N 318 ECP SAF 22613 x 2.1/8 W 6306-2RS1