Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71944 ACD/P4A

71944 ACD/P4A

Dimensions

d		220	mm
D		300	mm
B		38	mm
d₁		244.7	mm
d₂		244.7	mm
D₁		275.3	mm
r_1,2	min.	2.1	mm
r_3,4	min.	1	mm
a		79.9	mm

Abutment dimensions

d_a	min.	231	mm
d_b	min.	231	mm
D_a	max.	289	mm
D_b	max.	295	mm
r_a	max.	2	mm
r_b	max.	1	mm
d_n		251.4	mm

Calculation data

Basic dynamic load rating	C	208	kN
Basic static load rating	C₀	285	kN
Fatigue load limit	P_u	7.5	kN
Attainable speed for grease lubrication		3800	r/min
Attainable speed for oil-air lubrication		5600	r/min
Ball diameter	D_w	25.4	mm
Number of balls	z	29
Reference grease quantity	G_ref	84	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	1300	N
Static axial stiffness, preload class A		533	N/µm
Preload class B	G_B	2600	N
Static axial stiffness, preload class B		699	N/µm
Preload class C	G_C	5200	N
Static axial stiffness, preload class C		934	N/µm
Preload class D	G_D	10400	N
Static axial stiffness, preload class D		1275	N/µm
Calculation factors
Calculation factor	f	1.28
Calculation factor	f₁	0.98
Calculation factor	f_2A	1
Calculation factor	f_2B	1.04
Calculation factor	f_2C	1.08
Calculation factor	f_2D	1.14
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

6.6

Model Number: 71944 ACD/P4A
Inner Diameter：220mm Outer Diameter：300mm Width：38mm
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：2026-07-25
Application:Machine Tool Accessories,hydraulic control element,screen filter,Forging machine,Optical Instruments,Logistics Equipment,Vertical pull,tapping machine,hydraulic connector,Industrial,rolling mill roll neck and slowdown device
Similar models:71944 CD/HCP4AL 71944 CD/P4A 71944 ACD/P4A 71944 CD/P4AL 71944 CD/HCP4A 71944 ACD/HCP4A 71944 ACD/P4AL 71944 ACD/HCP4AL
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Model No. Inner Diameter Outer Diameter Width Type

53215 + U 215
6207-2RSH
7012 ACE/HCP4AL
87807
GEC 530 FBAS

Purchase the SKF 71944 ACD/P4A Please fill in the following

Hot number： 11066 19062 BD-22330-2CS5K/VT143-H 2330 241/530 ECAK30/W33 305802 C-2RS1 51100 V/HR22T2 6412 NR 71924 ACD/HCP4AL 9663 99141 K 12x17x13 TN NJ 2316 ECP NU 213 ECM/C3VL0241 NU 2968 M PCZ 1010 E

Model No.	Inner Diameter	Outer Diameter	Width	Type
53215 + U 215
6207-2RSH
7012 ACE/HCP4AL
87807
GEC 530 FBAS