Drawn cup needle roller bearings, as the name suggests, are needle roller bearings with a deep drawn, thin-walled outer ring with either open ends or a closed end. These bearings are mounted with a tight interference fit in the housing. That enables a simple and economic design of the housing bore, as shoulders or snap rings are not required to locate the bearing axially. They are characterized by a very low sectional height and high load carrying capacity.
Types of Drawn cup needle roller bearings
Drawn cup needle roller bearings with open ends:
- are available open (without seals) or sealed on one or both sides.
Drawn cup needle roller bearings with a closed end:
- are available open or sealed.
- are suitable for bearing arrangements where they are situated at the end of a shaft.
- accommodate small axial guidance forces, because of the profiled design of their closed end.
Full complement bearings with open ends:
- are suitable for very heavy radial loads at moderate speeds.
- are available with open ends and without seals only.
Features of Drawn cup needle roller bearings
- Low cross section
In applications where less space is available, drawn cup needle roller bearings enable downsizing.
- High load carrying capacity and stiffness
Owing to their large number of rollers, drawn cup needle roller bearings have a high load carrying capacity and stiffness.
- Good running properties
Applications of Drawn cup needle roller bearings
Drawn cup needle roller bearings are typically used in applications where the housing bore cannot be used as a raceway for a needle roller and cage assembly, but where a very compact and economical bearing arrangement is required.
- valve trains
- power tools
- transfer cases