Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71808 ACD/HCP4

71808 ACD/HCP4

Dimensions

d		40	mm
D		52	mm
B		7	mm
d₁		44.1	mm
d₂		44.1	mm
D₁		48.1	mm
r_1,2	min.	0.3	mm
r_3,4	min.	0.15	mm
a		14.3	mm

Abutment dimensions

d_a	min.	42	mm
d_b	min.	42	mm
D_a	max.	50	mm
D_b	max.	51.2	mm
r_a	max.	0.3	mm
r_b	max.	0.15	mm
d_n		44.5	mm

Calculation data

Basic dynamic load rating	C	4.49	kN
Basic static load rating	C₀	4.55	kN
Fatigue load limit	P_u	0.196	kN
Attainable speed for grease lubrication		28000	r/min
Attainable speed for oil-air lubrication		43000	r/min
Ball diameter	D_w	3.175	mm
Number of balls	z	29
Reference grease quantity	G_ref	0.31	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	40	N
Static axial stiffness, preload class A		93	N/µm
Preload class B	G_B	120	N
Static axial stiffness, preload class B		145	N/µm
Preload class C	G_C	240	N
Static axial stiffness, preload class C		197	N/µm
Calculation factors
Calculation factor	f	1.23
Calculation factor	f₁	0.97
Calculation factor	f_2A	1
Calculation factor	f_2B	1.09
Calculation factor	f_2C	1.17
Calculation factor	f_HC	1.02
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

0.029

Model Number: 71808 ACD/HCP4
Inner Diameter：40mm Outer Diameter：52mm Width：7mm
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：2026-04-16
Application:horizontal processing,mathematical instruments,Special Equipment,sheet industry,medical equipment,Security Equipment,car instrument,Cleaning equipment,sample cup,beverage production,Textile Industry Accessories and Accessories
Similar models:71808 CD/HCP4 71808 CD/P4 71808 ACD/P4 71808 ACD/HCP4
BEARING POWER International Trading Co.,Ltd. specialize in 71808ACD/HCP4 products，there is large inventory of SKF 71808 ACD/HCP4 Angular contact ball bearings, super-precision. We has been built up long-term cooperation with SKF company, could make a bulk order of the 71808 ACD/HCP4 Which SKF 71808ACD/HCP4 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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