Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71909 ACE/HCP4A

71909 ACE/HCP4A

Dimensions

d		45	mm
D		68	mm
B		12	mm
d₁		52.7	mm
d₂		51	mm
D₁		60.3	mm
r_1,2	min.	0.6	mm
r_3,4	min.	0.3	mm
a		20	mm

Abutment dimensions

d_a	min.	48.2	mm
d_b	min.	47	mm
D_a	max.	64.8	mm
D_b	max.	66	mm
r_a	max.	0.6	mm
r_b	max.	0.3	mm
d_n		54.2	mm

Calculation data

Basic dynamic load rating	C	9.75	kN
Basic static load rating	C₀	6.55	kN
Fatigue load limit	P_u	0.275	kN
Attainable speed for grease lubrication		30000	r/min
Attainable speed for oil-air lubrication		47000	r/min
Ball diameter	D_w	6.35	mm
Number of balls	z	21
Reference grease quantity	G_ref	1.5	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	88	N
Static axial stiffness, preload class A		94	N/µm
Preload class B	G_B	265	N
Static axial stiffness, preload class B		141	N/µm
Preload class C	G_C	529	N
Static axial stiffness, preload class C		185	N/µm
Calculation factors
Calculation factor	f	1.09
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_HC	1.01
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

0.12

Model Number: 71909 ACE/HCP4A
Inner Diameter：45mm Outer Diameter：68mm Width：12mm
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:Dental Drill etc,test strip,food safety,diagnostic test paper,metal mold,wheel lathe,CNC,large agricultural machinery,storage and transportation equipment,expectoration machine,medical equipment
Similar models:71909 ACE/P4AL S71909 ACD/P4A S71909 CB/P4A 71909 CD/P4A 71909 ACE/P4A S71909 ACE/HCP4A S71909 ACB/P4A 71909 ACB/P4AL 71909 CE/P4AH1 71909 ACD/P4A
BEARING POWER International Trading Co.,Ltd. specialize in 71909ACE/HCP4A products，there is large inventory of SKF 71909 ACE/HCP4A Angular contact ball bearings, super-precision. We has been built up long-term cooperation with SKF company, could make a bulk order of the 71909 ACE/HCP4A Which SKF 71909ACE/HCP4A 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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Hot number： 21318 EK 24913 29292 34700 40x55x8 HMS5 V 7222 CD/HCP4A 7317 BECBF 7417 BAGAMC 89328 M BT4B 328977 BG/HA1VA901 KM 19 MB 21 NUP 219 ECML NATV 8 PPA SD 45x52x4