Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71921 CD/HCP4A

71921 CD/HCP4A

Dimensions

d		105	mm
D		145	mm
B		20	mm
d₁		117.3	mm
d₂		117.3	mm
D₁		132.7	mm
r_1,2	min.	1.1	mm
r_3,4	min.	0.6	mm
a		26.8	mm

Abutment dimensions

d_a	min.	111	mm
d_b	min.	111	mm
D_a	max.	139	mm
D_b	max.	141	mm
r_a	max.	1	mm
r_b	max.	0.6	mm
d_n		120.6	mm

Calculation data

Basic dynamic load rating	C	61.8	kN
Basic static load rating	C₀	69.5	kN
Fatigue load limit	P_u	2.6	kN
Attainable speed for grease lubrication		10000	r/min
Attainable speed for oil-air lubrication		16000	r/min
Ball diameter	D_w	12.7	mm
Number of balls	z	27
Reference grease quantity	G_ref	11.1	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	230	N
Static axial stiffness, preload class A		122	N/µm
Preload class B	G_B	460	N
Static axial stiffness, preload class B		168	N/µm
Preload class C	G_C	920	N
Static axial stiffness, preload class C		239	N/µm
Preload class D	G_D	1840	N
Static axial stiffness, preload class D		350	N/µm
Calculation factors
Calculation factor	f	1.25
Calculation factor	f₁	1
Calculation factor	f_2A	1
Calculation factor	f_2B	1.07
Calculation factor	f_2C	1.12
Calculation factor	f_2D	1.18
Calculation factor	f_HC	1.04
Calculation factor	f₀	16.4

Mass

Mass bearing

0.7

Model Number: 71921 CD/HCP4A
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：2024-12-14
Application:Internal thread type,rehabilitation training equipment,Small air generators,food sterilization,injection molding machine,trolley,dye pigments,electromagnetic clutch,hardware,Energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving,stamping die and its equipment
Similar models:71921 ACD/P4AH1 71921 ACD/HCP4AL 71921 ACD/P4AL 71921 CD/P4AH1 S71921 CD/P4A 71921 ACD/P4A 71921 ACD/HCP4AH1 71921 CD/HCP4AH1 S71921 ACD/P4A 71921 CD/HCP4AL
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Model No.	Inner Diameter	Outer Diameter	Width	Type
17624	44.45	71.37	7.95	Seals
19831	50.8	69.85	7.95	Seals
37338	95.25	114.3	9.6774	Seals
37526	95.25	126.97	9.53	Seals
401602	144	-	-	Seals
53100	134.9502	161.93	12.7	Seals
7021 ACD/HCP4AL	105	160	26	Bearings, units and housings
OKCX 780	780		-
NN 3048 K/SPW33	240	360	92	Bearings, units and housings
RNA 2208.2RS	48	80	22.7	Bearings, units and housings
SAFS 22524 x 4.1/8 TLC	104.775	-	-	Bearings, units and housings
YET 203-008	12.7	40	28.6	Bearings, units and housings

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