MachinistMike123
Plastic
- Joined
- Oct 16, 2019
I'm now on an Okuma Vertical Borer VTM 80Yb. I'm machining jobs which weigh around 1 tonne. Just looking for advice on the best way to machine the soft jaws. I've machined my jaws to 20" diameter, 4" deep. I was using a spider to grip on when I machined them, so I could only turn the pressure up to 100 psi. I've got my pressure set at 400 psi and gripped the job. However, the jaws are lifting slightly off the chuck when I clamp the job. This is causing there to be a taper in the job, so I need to eliminate this. When I reduce the pressure, it doesn't lift as much, however I can't afford to be reducing the pressure as the large O.D is 28" and it weighs a tonne... literally! Any help or advice would be welcome guys.