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 344 N2MA

QJ 344 N2MA

Dimensions

d		220	mm
D		460	mm
B		88	mm
d₁	≈	308	mm
D₁	≈	372	mm
a		238	mm
h		15	mm
b		12.5	mm
r₀		2.5	mm
r_1,2	min.	5	mm

Abutment dimensions

d_a	min.	242	mm
D_a	max.	438	mm
r_a	max.	4	mm

Calculation data

Basic dynamic load rating	C	780	kN
Basic static load rating	C₀	1400	kN
Fatigue load limit	P_u	32	kN
Limiting speed		2400	r/min
Calculation factor	e	0.95
Calculation factor	X	0.6
Calculation factor	Y₀	0.58
Calculation factor	Y₁	0.66
Calculation factor	Y₂	1.07

Mass

Mass bearing

Model Number: QJ 344 N2MA
Inner Diameter：220mm Outer Diameter：460mm Width：88mm
Reference speed:2400 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：2026-06-24
Application:special broaching machine,electronic materials,bag machine,paper processing machine,Flame Cutting,EEG,tobacco machinery,Laser Devices,medical equipment,non-ferrous metal alloy,rehabilitation training equipment
Similar models:344/332 AA PRM 303440 LL 483448/418 QJ 344 N2/309829 22344-2CS5/VT143 BD-23244 CCK/W33-AOH 2344 NCF 2344 ECJB 22344-2CS5K/VT143 NU 2344 ECN1MA NU 344 M
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Model No. Inner Diameter Outer Diameter Width Type

51414 M
D/W RW156-2ZS
K 22x30x15 TN
NA 6913
NKI 28/30

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Model No.	Inner Diameter	Outer Diameter	Width	Type
51414 M
D/W RW156-2ZS
K 22x30x15 TN
NA 6913
NKI 28/30