Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71905 CD/HCP4A

71905 CD/HCP4A

Dimensions

d		25	mm
D		42	mm
B		9	mm
d₁		30.6	mm
d₂		30.6	mm
D₁		36.4	mm
r_1,2	min.	0.3	mm
r_3,4	min.	0.2	mm
a		9	mm

Abutment dimensions

d_a	min.	27	mm
d_b	min.	27	mm
D_a	max.	40	mm
D_b	max.	40.6	mm
r_a	max.	0.3	mm
r_b	max.	0.2	mm
d_n		31.8	mm

Calculation data

Basic dynamic load rating	C	6.76	kN
Basic static load rating	C₀	4	kN
Fatigue load limit	P_u	0.17	kN
Attainable speed for grease lubrication		45000	r/min
Attainable speed for oil-air lubrication		63000	r/min
Ball diameter	D_w	4.762	mm
Number of balls	z	18
Reference grease quantity	G_ref	0.54	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	25	N
Static axial stiffness, preload class A		27	N/µm
Preload class B	G_B	50	N
Static axial stiffness, preload class B		36	N/µm
Preload class C	G_C	100	N
Static axial stiffness, preload class C		49	N/µm
Preload class D	G_D	200	N
Static axial stiffness, preload class D		69	N/µm
Calculation factors
Calculation factor	f	1.07
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	10.2

Mass

Mass bearing

0.039

Model Number: 71905 CD/HCP4A
Inner Diameter：25mm Outer Diameter：42mm Width：9mm
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:Optical detection,Medical printer,packaging machinery,Special Equipment,boring bar boring bar,reducer,product accessories,laser devices,wall materials,car instrument,Embroidery
Similar models:71905 CD/HCP4A 71905 ACE/HCP4AL 71905 ACD/HCP4A S71905 CD/HCP4A S71905 CE/P4A 71905 ACE/HCP4AH 71905 CE/P4AL 71905 CE/HCP4AL S71905 ACE/P4A 71905 CE/P4A
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Hot number： BD-23222 CCK/W33-AHX 3222 G 32228T158/DB 7203 BECBP 91374 99094 BT4B 332716/HA1 NA 49/28 NNU 41/600 M/W33 NNU 4921 BK/SPW33 NUTR 3580 X P 17 RM PCMS 2005001.5 M RLS 14 SAF 22240 SAW 23544 x 7.1/2 TLC