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

71948 CD/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		56.6	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	229	kN
Basic static load rating	C₀	325	kN
Fatigue load limit	P_u	8.15	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	31
Reference grease quantity	G_ref	93	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	860	N
Static axial stiffness, preload class A		237	N/µm
Preload class B	G_B	1720	N
Static axial stiffness, preload class B		325	N/µm
Preload class C	G_C	3440	N
Static axial stiffness, preload class C		461	N/µm
Preload class D	G_D	6880	N
Static axial stiffness, preload class D		678	N/µm
Calculation factors
Calculation factor	f	1.32
Calculation factor	f₁	1
Calculation factor	f_2A	1
Calculation factor	f_2B	1.04
Calculation factor	f_2C	1.09
Calculation factor	f_2D	1.15
Calculation factor	f_HC	1
Calculation factor	f₀	16.7

Mass

Mass bearing

8.5

Model Number: 71948 CD/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：2021-06-04
Application:Cylinder Pneumatic Treatment Element,Storage Device,boring bar boring bar,linear drive,vacuum suction cup,agricultural testing and analysis equipment and related,embroidery cloth,Automobile,plastic molding,Machine tool accessories,medical Equipment
Similar models:71948 ACD/P4A 71948 ACD/P4AL 71948 CD/HCP4AL 71948 CD/P4A 71948 CD/HCP4A 71948 CD/P4AL 71948 ACD/HCP4A 71948 ACD/HCP4AL
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Hot number： 23156 CCK/W33 23988 CC/W33 400201 63.6x82.5x15.0 TP 7829 BT4B 331161 AG/HA4 BT4B 334141 G/HA1VA901 IR 160x175x40 NA 2200.2RS NJ 406 MA NNCF 5013 CV NNU 4936 BK/SPW33 PF 40 FM SAF 22616 x 2.5/8 T W 619/1