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Harold Hall's precision grinding table

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wheeltapper:
Hi
I think you'll find the sizes refer to the diameter of the countersink.

Roy

wongster:
Hi Roy,

Which is the one for the plastic ball?

Regards,
Wong

wheeltapper:
Hi
I just looked at my rest and the countersink is 17mm diameter.

the biggest one in the above mentioned set only goes up to 15mm whereas my set goes up to 25mm.

I suppose you could get away with 15mm, it should grip enough.

Roy

wongster:

--- Quote from: wheeltapper on June 04, 2011, 09:53:16 AM ---Hi
I just looked at my rest and the countersink is 17mm diameter.

the biggest one in the above mentioned set only goes up to 15mm whereas my set goes up to 25mm.

I suppose you could get away with 15mm, it should grip enough.

Roy

--- End quote ---

Do you know the size of the shank? Is the included angle the same as on the plan?

Regards,
Wong

wheeltapper:
The countersink on the plan looks to be 20mm dia and 60 degree.
but I didn't worry too much about that.
It's only got to hold on to the ball, it's not that critical. the idea is to make the sinks first then assemble the bits roughly and measure how long the bottom spacer needs to be.

Roy.

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