Thread: Orden TC grinder

The one I have is too big. Roughly 1.250x.930x1.750 long. Any takers?

Ew

I want to make some wheel arbors. Nominal size is 31.75mm (1.25"). The arbor I have measures 31.70, but it's seen better days and I'm not sure which number to aim for. I know there should be clearance on the wheel bore but how much? Does anyone have a newish arbor they could mike for me?

The spindle has some run-out and there's an opportunity to compensate with the arbors. I figure the wheel/arbor clearance tells me the smallest amount of run-out worth chasing.

My never before used wheel has an ID of 1.254" (31.85mm)
The spindle on the arbor (lightly used, no abuse marks) is 1.230" (31.24mm). The wheels have a soft inner to them, so I would not expect any wear even if the wheel did slip.Provided the wheel clamps up firmly, dressing will take any eccentricity out of the OD. 31.70mm does not sound too awful.

Michael

Thanks Michael. I will add that I'll be using a straight cup wheel in the first instance and I wouldn't want to be dressing the rim of that too often, for fear it would become unsafe as it thinned. So it seems worth minimising runout. If no-one ventures a larger number I will stick to 31.70.

Are you running the machine on a vfd Bryan? If not the jerk from the motor starting tends to be enough to move the wheel a tiny bit on the arbor. Since your spindle has runout I would put permanent witness marks on the spindle and arbors so you should be able to put wheels back with negligible runout.

Ew

Ew at this stage it has a single phase motor. Later I may either do a 3ph/vfd or a treadmill conversion.
Registration makes sense, I will certainly do that. Will be interesting to see how much slip I get with single phase.

Is a mechanical clutch a crazy idea? Or just a belt release?