Bearings, units and housings -- Ball bearings -- Angular contact ball bearings -- Four-point contact ball bearings -- Angular contact ball bearings, four-point contact ball bearings SKF QJ 1284 N2MA

QJ 1284 N2MA

Dimensions

d		420	mm
D		760	mm
B		150	mm
d₁	≈	549	mm
D₁	≈	631	mm
a		590	mm
h		20.5	mm
b		25	mm
r₀		3	mm
r_1,2	min.	7.5	mm

Abutment dimensions

d_a	min.	456	mm
D_a	max.	724	mm
r_a	max.	6	mm

Calculation data

Basic dynamic load rating	C	1430	kN
Basic static load rating	C₀	3750	kN
Fatigue load limit	P_u	64	kN
Limiting speed		1300	r/min
Calculation factor	e	1.34
Calculation factor	X	0.54
Calculation factor	Y₀	0.44
Calculation factor	Y₁	0.47
Calculation factor	Y₂	0.81

Mass

Mass bearing

315

Model Number: QJ 1284 N2MA
Inner Diameter：420mm Outer Diameter：760mm Width：150mm
Reference speed:1300 r/min Limiting speed:-
Type：Bearings, units and housings Ball bearings Angular contact ball bearings Four-point contact ball bearings
Details： Four-point contact ball bearings Angular contact ball bearings, four-point contact ball bearings
Update date：2026-07-31
Application:set bacteria instrument,Liposuction device,economic mold,relay,food add,hydraulic control element,Workpiece,Hairbrush device,gas turbine,Gear grinding machine,Dental Drill etc
Similar models:312844/VJ202 81284 M QJ 1284 N2MA 51284 F 312844
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Model No. Inner Diameter Outer Diameter Width Type

47x90x10 HMSA10 RG
609/710 MA
6248 M
71918 ACD/P4A
FYE 1 1/2

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Hot number： 401001 4012 47586 4909 511/560 F 81108 TN AOH 32/530 G BTM 70 ATN9/P4CDB NUP 213 ECML OKC 090 OKF 150 SAF 22328 SAFS 23048 KAT x 8.15/16 SNL 3068 G SSAFS 22522 x 4 TLC

Model No.	Inner Diameter	Outer Diameter	Width	Type
47x90x10 HMSA10 RG
609/710 MA
6248 M
71918 ACD/P4A
FYE 1 1/2