Large Four Point Contact Ball Bearings for Industrial Equipment
Four point contact ball bearings are designed to support combined radial and axial loads with a single bearing arrangement. Large size QJ and QJF series bearings are widely used in heavy industrial equipment where space saving, high axial capacity and reliable operation are required.
We provide large four point contact ball bearings with bore sizes ranging from 100mm to 600mm, supported by reliable manufacturing partners and OEM production capabilities for steel plants, gearboxes, lifting equipment and other demanding applications.
QJ and QJF Series Four Point Contact Ball Bearings
QJ Series Four Point Contact Bearings
QJ series bearings feature a split inner ring design and are commonly used where high axial loads are present in both directions. They can replace certain angular contact bearing arrangements while reducing installation space.
QJF Series Four Point Contact Bearings
QJF series bearings are designed for heavy duty applications requiring enhanced rigidity and load capacity. They are suitable for large industrial machines operating under continuous loads.
Advantages of Large Four Point Contact Ball Bearings
High Axial Load Capacity
The four contact points between balls and raceways allow the bearing to carry axial loads in both directions.
Space Saving Design
One four point contact bearing can replace a pair of angular contact bearings in many applications.
Customized Industrial Solutions
Large bore sizes, special clearances and OEM designs are available according to equipment requirements.
Applications of QJ QJF Four Point Contact Bearings
- Steel mill equipment
- Industrial gearboxes
- Heavy machinery
- Lifting and handling equipment
- Mining machinery
- Rolling mill auxiliary equipment
- Large transmission systems
- Special industrial machines
QJ Series Four Point Contact Bearing Size Range
Our large four point contact ball bearings cover bore diameters from 100mm to 600mm, including popular QJ and QJF models. Each bearing can be manufactured according to customer requirements including dimensional modifications, internal clearance and lubrication options.