FAG Bearing QJ1068-MPA

Four point contact bearing QJ10..-MPA, solid brass cage
d=340mm, D=520mm, B=82mm, Mass bearing=66.4kg
Material: Bearing steels
In Stock:
Photo may not represent actual item. See the technical specification for details.

Specifications of FAG Bearing QJ1068-MPA

FAG Bearing QJ1068-MPA
FAG Bearing QJ1068-MPA

Dimensions

α 35 ° Contact-angle
a 301 mm Distance between the apexes of the pressure cones
d1 403.6 mm Shoulder diameter inner ring
D1 459 mm Shoulder diameter outer ring
rmin 5 mm Minimum chamfer dimension

Main Dimensions & Performance Data

Cr 760000 N Basic dynamic load rating, radial
C0r 1640000 N Basic static load rating, radial
d 340 mm Bore diameter
Cur 44000 N Fatigue load limit, radial
nG 2070 1/min Limiting speed
D 520 mm Outside diameter
nδr 960 1/min Reference speed
B 82 mm Width

Mounting dimensions

Da max 502 mm Maximum diameter of housing shoulder
ra max 4 mm Maximum recess radius
da min 358 mm Minimum diameter shaft shoulder

Temperature range

Tmax 200 ℃ Operating temperature max.
Tmin -30 ℃ Operating temperature min.

Product description of FAG Bearing QJ1068-MPA

FAG Bearing QJ1068-MPA , Four-point contact ball bearings are angular contact ball bearings with raceways that are designed to support axial loads in both directions. They need considerably less space than double-row bearings.,Four-point contact bearings are single-row angular contact ball bearings and therefore require significantly less space in an axial direction than double-row designs.

The bearings comprise solid outer rings, split inner rings and ball and cage assemblies with brass or poly-amide cages. The two-piece inner rings enable a large complement of balls to be accommodated. The inner ring halves are matched to the particular bearing and must not be interchanged with those of other bearings of the same size. The outer ring with the ball and cage assembly can be mounted separately from the two inner ring halves.

FAG Bearing QJ1068-MPA, Four point contact bearings are similar in their structure to double row angular contact ball bearings, but are considerably narrower in an axial direction due to only one raceway groove. Since the centre of curvature of the arc-shaped raceways on the inner ring and outer ring are offset relative to each other, the balls are in contact with the bearing rings at four points under radial load. For this reason, four point contact bearings are only used under predominantly axial load.

Due to the large contact angle on both sides, the bearings can support alternating, pure axial or predominantly axial loads.

If predominantly radial load is present, four point contact bearings should not be used due to the higher friction in the four point contact.

One of the two bearing rings, normally the inner ring, is split for assembly reasons in order to allow filling with the balls. As four point contact bearings FAG Bearing QJ1068-MPA are often fitted without radial retention, the outer rings can be designed as an option with retaining slots to prevent rotation.

A main area of application is in gearbox engineering, where axial loads are present in both directions and close axial guidance is required in conjunction with a small bearing width.

Four point contact bearings are often combined with a radial bearing and used as an axial bearing with radial clearance in a housing.

FAG Bearing QJ1068-MPA, Four point contact bearings are particularly suitable where: • Predominantly axial loads must be supported • The axial design envelope is not sufficient for double row radial angular contact ball bearings • Radial forces must be supported by a separate radial bearing • Axial forces occur in both directions and a close axial clearance is required in conjunction with a small bearing width, e. g. in gearbox engineering

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