Bearing Track Grinding Machines
Nova manufactures flexible CNC Grinding Systems that feature excellent accessibility for quick change-over, serviceability and maximum up-time whilst providing the rigidity required for the most demanding of grinding applications. The range comprises of Internal, External, Combined and Special grinding machines for the Bearing and Constant Velocity Joint industries.
Nova internal grinders are used to make small parts, such as bearings, valve lifters, and giant parts such as landing gear struts. Three work holding systems are available; roller/shoe type, magnetic/shoe type and chucking with front loader or through the spindle. Tooling costs are low and change-over is rapid.
The bearing industry typically uses the magnetic/shoe system. Parts must be made from magnetic steel and have a ground OD and face. When the part has a ground OD the roller/shoe system is used. Chucking systems are available when the parts do not have ground external surfaces.
External grinding is critical to many manufacturing organizations. The performance of parts such as bearings and CV joints are directly tied to how well they are ground. At the same time external grinding is a bottleneck for most manufactures.
The Nova PGE series of external grinders are built to achieve roundness of less than 0.0005mm with cycle times as short as a few seconds. Dressing systems are available to shape the wheel for roller bearing tracks, ball bearing grooves and C-V Joint cage OD’s.
When components have multiple surfaces to be ground with tight geometrical tolerances between them, then combination grinding is the best process. With a component such as a gear, the part is chucked on the pitch diameter of the teeth. As many as 4 spindles can be utilized, 2 or 4 spindles can be placed on a turret. These wheels can one at a time be presented to the part to grind the bore, the front face or the back face.
An independent set of slides can be arranged on the machine tangentially with a grinding wheel up to 500mm in dia. This wheel can grind an external surface while any one of the wheels on the turret is internal grinding simultaneously.
Grinding of Constant velocity Joints for the Automotive Industry is a specialty of Meccanica Nova. Machines are designed for many components of the CVJ and other automotive and on/off-highway applications. The most common are:
- Outer Race (Bell): Internal Sphere and Ball Tracks
- Inner Race (Star): External and Ball Tracks
- Ball Cage: Internal, External and Windows
Nova - Providing Precision Grinding Solutions Since 1937