Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 7021 ACD/P4AH1

7021 ACD/P4AH1

Dimensions

d		105	mm
D		160	mm
B		26	mm
d₁		121.9	mm
d₂		121.9	mm
D₁		143.1	mm
K		0.5	mm
C₁		6.92	mm
r_1,2	min.	2	mm
r_3,4	min.	1	mm
a		44	mm

Abutment dimensions

d_a	min.	114	mm
d_b	min.	114	mm
D_a	max.	151	mm
D_b	max.	155	mm
r_a	max.	2	mm
r_b	max.	1	mm
d_n		125.6	mm

Calculation data

Basic dynamic load rating	C	90.4	kN
Basic static load rating	C₀	93	kN
Fatigue load limit	P_u	3.4	kN
Attainable speed for grease lubrication		7500	r/min
Attainable speed for oil-air lubrication		12000	r/min
Ball diameter	D_w	17.462	mm
Number of balls	z	21
Reference grease quantity	G_ref	20.4	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	560	N
Static axial stiffness, preload class A		279	N/µm
Preload class B	G_B	1120	N
Static axial stiffness, preload class B		365	N/µm
Preload class C	G_C	2240	N
Static axial stiffness, preload class C		484	N/µm
Preload class D	G_D	4480	N
Static axial stiffness, preload class D		655	N/µm
Calculation factors
Calculation factor	f	1.15
Calculation factor	f₁	0.99
Calculation factor	f_2A	1
Calculation factor	f_2B	1.02
Calculation factor	f_2C	1.05
Calculation factor	f_2D	1.08
Calculation factor	f_HC	1
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

1.59

Model Number: 7021 ACD/P4AH1
Inner Diameter：105mm Outer Diameter：160mm Width：26mm
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：2026-07-23
Application:plastic rolling,other accessories,Industrial,outdoor equipment,sheet industry,engine,car instrument,Gas turbine,garbage disposal,multi-knife lathe,Technical Equipment
Similar models:7021 CD/HCP4AH1 7021 CD/HCP4AL S7021 ACD/HCP4A 7021 ACD/HCP4AH1 S7021 CD/P4A 7021 ACD/P4A 7021 CD/HCP4A S7021 CD/HCP4A 7021 CD/P4AL 7021 ACD/P4AL
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Model No. Inner Diameter Outer Diameter Width Type

550259
BK 3038
NJ 308 ECP
SAW 23518 T
Z 014

Purchase the SKF 7021 ACD/P4AH1 Please fill in the following

Hot number： 105x125x12 CRS1 R 2320 KM 319352 32x46x8 CRS1 R 3308 A-2RS1TN9/MT33 6008-2RS1 6320/HC5C3 7022 CE/HCP4AL 90810 99273 FSAF 23024 KATLC x 4 FY 1.1/4 WDW KD2-103 KMK 9 SAF 22524 x 4.1/8 T

Model No.	Inner Diameter	Outer Diameter	Width	Type
550259
BK 3038
NJ 308 ECP
SAW 23518 T
Z 014