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：2026-04-17
Application:other lathe,product accessories,journal lathe,intermediate,Industrial,extruder,Cylinder Standard,universal category,spectrometer,motor,medical equipment
Similar models:L 183449/410 7344 BCBM QJ 344 N2/309829 BD-22344 CCK/W33-OH 2344 H 22344 CCK/W33 + AOH 2344 BD-22344-2CS5K/VT143-OH 2344 H LL 483448/418 22344 CCK/W33 PCM 303440 E L 183448/410
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Model No.	Inner Diameter	Outer Diameter	Width	Type
13612	34.925	53.49	6.35	Seals
BD-23292 CAK/W33-OH 3292 H	430	830	296	Bearings, units and housings
511/630 F	630	750	95	Bearings, units and housings
51226	130	190	45	Bearings, units and housings
60x90x10 HMS5 RG	60	90	10	Seals
71800 ACD/P4	10	19	5	Bearings, units and housings
GEM 70 ESX-2LS	70	105	40	Bearings, units and housings
IR 14x17x17	14	17	17	Bearings, units and housings
NCF 2916 CV	80	110	19	Bearings, units and housings
OKC 050	50		-
RNU 209 ECP	54.5	85	19	Bearings, units and housings
SIKAC 30 M/VZ019	30	-	37	Bearings, units and housings

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