Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71920 ACE/P4AL

71920 ACE/P4AL

Dimensions

d		100	mm
D		140	mm
B		20	mm
d₁		112.4	mm
d₂		109	mm
D₁		127.51	mm
b		2.3	mm
C₁		10.9	mm
C₂		3	mm
C₃		3.3	mm
r_1,2	min.	1.1	mm
r_3,4	min.	0.6	mm
a		39.2	mm

Abutment dimensions

d_a	min.	106	mm
d_b	min.	103.2	mm
D_a	max.	134	mm
D_b	max.	136.8	mm
r_a	max.	1	mm
r_b	max.	0.6	mm
d_n		115.4	mm

Calculation data

Basic dynamic load rating	C	36.4	kN
Basic static load rating	C₀	30	kN
Fatigue load limit	P_u	1.14	kN
Attainable speed for grease lubrication		11500	r/min
Attainable speed for oil-air lubrication		18000	r/min
Ball diameter	D_w	12.7	mm
Number of balls	z	24
Reference grease quantity	G_ref	10	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	332	N
Static axial stiffness, preload class A		187	N/µm
Preload class B	G_B	996	N
Static axial stiffness, preload class B		280	N/µm
Preload class C	G_C	1990	N
Static axial stiffness, preload class C		367	N/µm
Calculation factors
Calculation factor	f	1.18
Calculation factor	f₁	0.99
Calculation factor	f_2A	1
Calculation factor	f_2B	1.04
Calculation factor	f_2C	1.07
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

0.77

Model Number: 71920 ACE/P4AL
Inner Diameter：100mm Outer Diameter：140mm Width：20mm
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：2021-06-07
Application:spreader series,Pump,Spectrum Products,powder metallurgy,Hair styling device,agricultural testing and analysis equipment and related,Insect Count,Storage Device,machine tool spindle,wall industry,Energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving
Similar models:71920 ACE/HCP4AH1 71920 CB/HCP4A 71920 ACE/HCP4A 71920 ACE/P4AL 71920 ACD/P4A 71920 CD/P4AH1 S71920 CD/HCP4A 71920 ACB/HCP4AL 71920 CD/HCP4AL 71920 ACD/P4AH1
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Model No.	Inner Diameter	Outer Diameter	Width	Type
1020 VRME R	973	-	-	Seals
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99256	65.1002	73.4314	23.8252	Seals
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NJ 313 ECM	65	140	33	Bearings, units and housings
PBM 405060 M1G1	40	50	60	Bearings, units and housings
SAF 22609 T	36.5125	-	-	Bearings, units and housings
SAF 22526 x 4.5/16 T	109.5375	-	-	Bearings, units and housings

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