Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71921 ACD/P4AH1

71921 ACD/P4AH1

Dimensions

d		105	mm
D		145	mm
B		20	mm
d₁		117.3	mm
d₂		117.3	mm
D₁		132.7	mm
K		0.5	mm
C₁		5.46	mm
r_1,2	min.	1.1	mm
r_3,4	min.	0.6	mm
a		39.3	mm

Abutment dimensions

d_a	min.	111	mm
d_b	min.	111	mm
D_a	max.	139	mm
D_b	max.	141	mm
r_a	max.	1	mm
r_b	max.	0.6	mm
d_n		120.6	mm

Calculation data

Basic dynamic load rating	C	57.2	kN
Basic static load rating	C₀	65.5	kN
Fatigue load limit	P_u	2.5	kN
Attainable speed for grease lubrication		7500	r/min
Attainable speed for oil-air lubrication		12000	r/min
Ball diameter	D_w	12.7	mm
Number of balls	z	27
Reference grease quantity	G_ref	11.1	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	360	N
Static axial stiffness, preload class A		263	N/µm
Preload class B	G_B	720	N
Static axial stiffness, preload class B		346	N/µm
Preload class C	G_C	1440	N
Static axial stiffness, preload class C		463	N/µm
Preload class D	G_D	2880	N
Static axial stiffness, preload class D		633	N/µm
Calculation factors
Calculation factor	f	1.25
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

0.82

Model Number: 71921 ACD/P4AH1
Inner Diameter：105mm Outer Diameter：145mm 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：2025-12-09
Application:Industrial,coal,plastic blow molding,ultra-quiet generators,Roller,small appliances,Liposuction device,food packaging,machine lathe,tower crane,printing equipment
Similar models:71921 CD/HCP4AL S71921 ACD/P4A 71921 CD/P4AL S71921 ACD/HCP4A 71921 ACD/P4AH1 71921 CD/P4A S71921 CD/P4A 71921 ACD/HCP4AH1 71921 CD/P4AH1 S71921 CD/HCP4A
BEARING POWER International Trading Co.,Ltd. specialize in 71921ACD/P4AH1 products，there is large inventory of SKF 71921 ACD/P4AH1 Angular contact ball bearings, super-precision. We has been built up long-term cooperation with SKF company, could make a bulk order of the 71921 ACD/P4AH1 Which SKF 71921ACD/P4AH1 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.

Model No.	Inner Diameter	Outer Diameter	Width	Type
1530x1580x20 HDS1 R	1530	1580	20	Seals
11197	28.575	47.04	7.95	Seals
140 VL V	126	-	-	Seals
35086	88.9	130.2	11.13	Seals
7026 CD/P4A	130	200	33	Bearings, units and housings
91366	-	-	25	Seals
FY 504 M	-	-	-	Bearings, units and housings
HM 3196	75	-	480	Bearings, units and housings
KMFE 28 L	28	-	140	Bearings, units and housings
NKS 20	20	32	20	Bearings, units and housings
P 85 R-40 RM	40	-	-	Bearings, units and housings
Z 210	50	-	6	Seals

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Hot number： 1240 VRME R 15462 49984 6204-ZNR BT4B 334106 G/HA1VA901 FY 15 TF IR 320x350x80 KMFE 24 H PRM 151715 RNA 4912 SAF 23048 KA x 8.15/16 SNW 118x3.1/8 SYNT 70 L W 638/2.5 R-2Z W 63800 R-2RS1