JA4-60 Diaphragm Chuck on a Grinding Machine
The JA4-60 is mounted at the front of the grinding spindle. The wheel approaches the workpiece from the side, with a coolant nozzle aimed at the working area. The close view shows how the chuck nose and wheel fit around the part.
How the grip works
The built-in pneumatic cylinder flexes a metal diaphragm. Its gripping segments move with that small elastic deflection. The grip does not depend on conventional jaws travelling along long slideways. A replaceable diaphragm collet is finished to match the part. External gripping closes onto the outside diameter. Internal gripping expands against the bore.
Choose the gripping direction from the machining datum. Gripping inside a bore leaves the outside diameter accessible. For a slender shaft or thin wall, set the contact length, overhang and clamping force together. After mounting, check the chuck datum first, then the gripped part.
What to check in this setup
- Check approach clearance against the wheel width.
- Keep the gripping and grinding sections separate.
- Check chuck and workpiece runout after mounting.