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 311 MA

QJ 311 MA

SKF Explorer

Dimensions

d		55	mm
D		120	mm
B		29	mm
d₁	≈	70.5	mm
D₁	≈	97.8	mm
a		61	mm
r_1,2	min.	2	mm

Abutment dimensions

d_a	min.	66	mm
D_a	max.	109	mm
r_a	max.	2	mm

Calculation data

Basic dynamic load rating	C	137	kN
Basic static load rating	C₀	118	kN
Fatigue load limit	P_u	5	kN
Limiting speed		10000	r/min
Calculation factor	A	40.42
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

1.75

Model Number: QJ 311 MA
Inner Diameter：55mm Outer Diameter：120mm Width：29mm
Reference speed:10000 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：2026-04-16
Application:tire industry,plastic molding,Hairbrush device,Machine tools,woodworking machinery,Spectrum Products,journal lathe,Security Equipment,respirator,universal category,auto tools
Similar models:22311 EK + AHX 2311 4311 ATN9 33116/DF 7311 BEGBP 33115/DF FSAF 22311 T QJ 311 MA 33117 NUP 311 ECM 331148 A
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Model No.	Inner Diameter	Outer Diameter	Width	Type
10074	25.4	47.02	6.35	Seals
40078	101.6	142.9	11.13	Seals
50186	127	180.98	12.7	Seals
6312-2ZNR	60	130	31	Bearings, units and housings
90799	-	-	45	Seals
FYAWK 3/4 LTA	19.05	-	-	Bearings, units and housings
FYE 3 N	76.2	-	-	Bearings, units and housings
GEH 30 ES-2LS	30	55	20	Bearings, units and housings
KRV 16	-	16	28	Bearings, units and housings
NN 3012 KTN/SP	60	95	26	Bearings, units and housings
PCM 161810 E	16	18	10	Bearings, units and housings
W 639/2-2Z	2	6	3	Bearings, units and housings

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