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：2026-04-18
Application:hardware,chemical instruments,Spectrum Products,safety testing,food packaging,cleaning agent,cooling system,Seals,medical equipment,bag machine,lifting upgrade
Similar models:51284 F QJ 1284 N2MA 81284 M 312844 312844/VJ202
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Model No.	Inner Diameter	Outer Diameter	Width	Type
148x170x15 HMSA10 V	148	170	15	Seals
19922	50.8	73.15	9.53	Seals
211 NR	55	100	21	Bearings, units and housings
230x260x15 HMS5 V	230	260	15	Seals
33217T145/DB	85	150	-	Bearings, units and housings
35x62x8 HMSA10 V	35	62	8	Seals
44x62x8 CRW1 R	44	62	8	Seals
607-RSL	7	19	6	Bearings, units and housings
60x72x8 HMSA10 RG	60	72	8	Seals
71922 ACD/P4AL	110	150	20	Bearings, units and housings
IR 110x125x40	110	125	40	Bearings, units and housings
YEL 206-2RF/VL065	30	62	48.4	Bearings, units and housings

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