FAG QJ304

Description

FAG QJ304 Four point contact bearing with slots a=35°

Designation	Mass	Dimension
	m	d	D	B	r	D1	d1	a	an
	≈kg	mm	mm	mm	min	≈	≈	≈
QJ304

FAG QJ304 Mounting dimensions

Features 

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 polyamide cages. The two-piece inner rings allow 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.

Axial load capacity in both directions

Due to the design of the rolling element raceways with their high raceway shoulders, the contact angle of 35° and the large number of rolling elements, four point contact bearings have a high load carrying capacity. They can support high axial forces in both directions as well as small radial loads.

With or without retaining slots in the outer ring

Single row four point contact bearings capable of supporting axial loads in both directions are often combined with a radial bearing and used as an axial bearing with radial clearance in a housing. For quick and secure location, larger four point contact bearings therefore have two retaining slots in the outer ring offset by 180°. These bearings have the suffix N2.

Operating temperature

Bearings with solid brass cages can be used at operating temperatures from –30 °C to +150 °C. Bearings with an outside diameter of more than 240 mm are dimensionally stable up to +200 °C. Bearings with cages made from glass fibre reinforced polyamide are suitable for operating temperatures up to +120 °C.