Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71944 ACD/HCP4A

71944 ACD/HCP4A

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		4500	r/min
Attainable speed for oil-air lubrication		6700	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		591	N/µm
Preload class B	G_B	2600	N
Static axial stiffness, preload class B		776	N/µm
Preload class C	G_C	5200	N
Static axial stiffness, preload class C		1036	N/µm
Preload class D	G_D	10400	N
Static axial stiffness, preload class D		1415	N/µm
Calculation factors
Calculation factor	f	1.28
Calculation factor	f₁	0.98
Calculation factor	f_2A	1
Calculation factor	f_2B	1.07
Calculation factor	f_2C	1.12
Calculation factor	f_2D	1.17
Calculation factor	f_HC	1.04
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

5.56

Model Number: 71944 ACD/HCP4A
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：2026-07-26
Application:Medium and large motor,Laser Devices,Insect Count,packing equipment,motorcycle,Textile Accessories,Forklift industry,reducer,Vertical pull,expectoration machine,medical equipment
Similar models:71944 CD/HCP4A 71944 CD/HCP4AL 71944 CD/P4AL 71944 ACD/HCP4A 71944 ACD/P4AL 71944 CD/P4A 71944 ACD/HCP4AL 71944 ACD/P4A
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Model No. Inner Diameter Outer Diameter Width Type

13092
20x35x8 HMS5 V
2310 E-2RS1KTN9
45x62x10 HMS5 RG
SA 8 C

Purchase the SKF 71944 ACD/HCP4A Please fill in the following

Hot number： 11740 BD-24044 CCK30/W33-AOH 24044 28748 401205 52215 8648 87785 FSYE 3 N-118 FYTB 510 M GEZ 112 ESX-2LS HM 31/750 RNU 226 ECM SAF 23038 KAT x 7 WBB1-8708 R-2RS1 W 627/5-2ZS

Model No.	Inner Diameter	Outer Diameter	Width	Type
13092
20x35x8 HMS5 V
2310 E-2RS1KTN9
45x62x10 HMS5 RG
SA 8 C