Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71909 ACD/P4A

71909 ACD/P4A

Dimensions

d		45	mm
D		68	mm
B		12	mm
d₁		52.6	mm
d₂		52.6	mm
D₁		60.4	mm
r_1,2	min.	0.6	mm
r_3,4	min.	0.3	mm
a		19.3	mm

Abutment dimensions

d_a	min.	48.2	mm
d_b	min.	48.2	mm
D_a	max.	64.8	mm
D_b	max.	66.6	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	12.4	kN
Basic static load rating	C₀	9	kN
Fatigue load limit	P_u	0.38	kN
Attainable speed for grease lubrication		17000	r/min
Attainable speed for oil-air lubrication		28000	r/min
Ball diameter	D_w	6.35	mm
Number of balls	z	23
Reference grease quantity	G_ref	1.62	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	80	N
Static axial stiffness, preload class A		100	N/µm
Preload class B	G_B	160	N
Static axial stiffness, preload class B		129	N/µm
Preload class C	G_C	320	N
Static axial stiffness, preload class C		168	N/µm
Preload class D	G_D	640	N
Static axial stiffness, preload class D		225	N/µm
Calculation factors
Calculation factor	f	1.11
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_2D	1.14
Calculation factor	f_HC	1
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

0.13

Model Number: 71909 ACD/P4A
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：2026-06-24
Application:vacuum filter,molding machine,agricultural testing and analysis equipment and related,Low-voltage electrical equipment,car instrument,spectrometer,Energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving,drawing die,Sensors,surgical instruments,wire industry
Similar models:S71909 CE/P4A S71909 ACB/HCP4A 71909 ACB/P4AL 71909 ACD/P4A 71909 ACE/HCP4AH1 71909 ACB/P4A 71909 CE/HCP4AH1 S71909 ACB/P4A 71909 ACE/HCP4A 71909 ACE/HCP4AL
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Model No. Inner Diameter Outer Diameter Width Type

1950 VL R
6215
7236 BCAM
PCM 131520 E
SYNT 40 LTS

Purchase the SKF 71909 ACD/P4A Please fill in the following

Hot number： 1040 VE R 23030 CC/W33 330758 BG 32022T84 X/DB 406000 C 39/800 M GEH 60 TXE-2LS SAF 22622 x 3.7/8 QJ 236 N2MA RNU 2207 ECP RPNA 18/32 S7022 ACD/HCP4A SAF 1618 TLC SNL 3068 SYFWK 1.7/16 LTA

Model No.	Inner Diameter	Outer Diameter	Width	Type
1950 VL R
6215
7236 BCAM
PCM 131520 E
SYNT 40 LTS