Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71948 CD/HCP4AL

71948 CD/HCP4AL

Dimensions

d		240	mm
D		320	mm
B		38	mm
d₁		264.7	mm
d₂		264.7	mm
D₁		295.3	mm
b		3.5	mm
C₁		20.9	mm
C₂		7.1	mm
C₃		5.45	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		4800	r/min
Attainable speed for oil-air lubrication		6700	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		263	N/µm
Preload class B	G_B	1720	N
Static axial stiffness, preload class B		361	N/µm
Preload class C	G_C	3440	N
Static axial stiffness, preload class C		512	N/µm
Preload class D	G_D	6880	N
Static axial stiffness, preload class D		752	N/µm
Calculation factors
Calculation factor	f	1.32
Calculation factor	f₁	1
Calculation factor	f_2A	1
Calculation factor	f_2B	1.07
Calculation factor	f_2C	1.12
Calculation factor	f_2D	1.18
Calculation factor	f_HC	1.04
Calculation factor	f₀	16.7

Mass

Mass bearing

5.98

Model Number: 71948 CD/HCP4AL
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：2025-12-09
Application:Broadcasting System,security equipment,Internal thread type,Industrial,rolling mill roll neck and slowdown device,ultra-quiet generators,disposable,plastic rolling,Cylinder Standard,Broadcasting System,test equipment
Similar models:71948 CD/HCP4AL 71948 CD/P4A 71948 CD/P4AL 71948 ACD/P4A 71948 ACD/P4AL 71948 CD/HCP4A 71948 ACD/HCP4A 71948 ACD/HCP4AL
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145x180x12 HMSA10 RG	145	180	12	Seals
30221/DF	105	190	-	Bearings, units and housings
592627	222.25	254	15.88	Seals
BSA 205 C	25	52	15	Bearings, units and housings
D/W RW2-2RS1	3.175	9.525	4.762	Bearings, units and housings
KMD 4	18	-	20	Bearings, units and housings
LM 377449/410	558.8	736.6	104.775	Bearings, units and housings
OKBS 72	72	-	-
PBM 557070 M1G1	55	70	70	Bearings, units and housings
SAW 23536 x 6.3/8	161.925	-	-	Bearings, units and housings
SYJ 511	-	-	-	Bearings, units and housings

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