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 1988 N2MA

QJ 1988 N2MA

Dimensions

d		440	mm
D		600	mm
B		74	mm
d₁	≈	495	mm
D₁	≈	544	mm
a		364	mm
h		12.5	mm
b		15	mm
r₀		2.5	mm
r_1,2	min.	4	mm

Abutment dimensions

d_a	min.	458	mm
D_a	max.	582	mm
r_a	max.	3	mm

Calculation data

Basic dynamic load rating	C	761	kN
Basic static load rating	C₀	1900	kN
Fatigue load limit	P_u	35.5	kN
Limiting speed		1500	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 1988 N2MA
Inner Diameter：440mm Outer Diameter：600mm Width：74mm
Reference speed:1500 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：2025-12-09
Application:Workpiece,construction machinery and equipment,floor industry,Cylinder Pneumatic Treatment Element,tapered grinder,Vertical machining,Power equipment,linear drive,Spectrum Products,Industry,Storage Device
Similar models:QJ 1988 N2MA 61988 MA 71988 ACMB NU 1988 MA 1988/1922
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Model No.	Inner Diameter	Outer Diameter	Width	Type
108x140x15 HMSA10 V	108	140	15	Seals
320x364x20 HDS2 D	320	364	20	Seals
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6317	85	180	41	Bearings, units and housings
D/W R155 R	3.967	7.938	2.779	Bearings, units and housings
EE 982051/982900	520.7	736.6	88.9	Bearings, units and housings
NNU 41/1120 M/W33	1120	1750	630	Bearings, units and housings
NU 311 ECML	55	120	29	Bearings, units and housings
S7022 ACB/HCP4A	110	170	28	Bearings, units and housings
SILR 35 ES	35	-	25	Bearings, units and housings
W 606-2Z	6	17	6	Bearings, units and housings

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