Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71948 ACD/P4A

71948 ACD/P4A

Dimensions

d		240	mm
D		320	mm
B		38	mm
d₁		264.7	mm
d₂		264.7	mm
D₁		295.3	mm
r_1,2	min.	2.1	mm
r_3,4	min.	1	mm
a		84.5	mm

Abutment dimensions

d_a	min.	251	mm
d_b	min.	251	mm
D_a	max.	309	mm
D_b	max.	315	mm
r_a	max.	2	mm
r_b	max.	1	mm
d_n		271.4	mm

Calculation data

Basic dynamic load rating	C	216	kN
Basic static load rating	C₀	305	kN
Fatigue load limit	P_u	7.8	kN
Attainable speed for grease lubrication		3200	r/min
Attainable speed for oil-air lubrication		4800	r/min
Ball diameter	D_w	25.4	mm
Number of balls	z	31
Reference grease quantity	G_ref	93	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	1350	N
Static axial stiffness, preload class A		584	N/µm
Preload class B	G_B	2700	N
Static axial stiffness, preload class B		767	N/µm
Preload class C	G_C	5400	N
Static axial stiffness, preload class C		1029	N/µm
Preload class D	G_D	10800	N
Static axial stiffness, preload class D		1412	N/µm
Calculation factors
Calculation factor	f	1.32
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

8.5

Model Number: 71948 ACD/P4A
Inner Diameter：240mm Outer Diameter：320mm 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：2026-04-19
Application:chemical,tapered grinder,walking Food processing machinery and equipment,mathematical instruments,Optical Instruments,defogging and degreasing,engine,power tools,medical equipment,Hydraulic Hose,ventilation heating equipment
Similar models:71948 ACD/HCP4AL 71948 CD/P4AL 71948 ACD/HCP4A 71948 CD/HCP4AL 71948 CD/HCP4A 71948 ACD/P4AL 71948 CD/P4A 71948 ACD/P4A
BEARING POWER International Trading Co.,Ltd. specialize in 71948ACD/P4A products，there is large inventory of SKF 71948 ACD/P4A Angular contact ball bearings, super-precision. We has been built up long-term cooperation with SKF company, could make a bulk order of the 71948 ACD/P4A Which SKF 71948ACD/P4A 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.

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