Once the blocks have been taken down to their final finished overall dimensions, the following machining operations remain to be done.
A curved bevel of 2 1/16" radius has to be machined on the top surface to allow for any movement when in use. The centre of the bronze has to be bored out to 7/8" diameter to take the Coupling Shaft Pins and the oil passage ways have to drilled. Steve will machine the 2 1/16" radius in Leicester - he has our Rotary Table with him up there - but I have drilled and tapped the blocks 3/8" BSF through the centre of the blocks just where the 7/8" holes will eventually go, so that he has the means through that to bolt the thing down whilst machining the radius. Boring them out to 7/8" after that operation will just take that threaded hole away.
We need a piece of 7/8" diameter Silver Steel for the Coupling Shaft Pins - and uncannily, I have this in stock already. Many years ago, there was a firm called "Whistons", who have long disappeared from the scene, who dealt mainly in Surplus Stock and I think that it is as long ago as 1975 - or even before that I bought a box of "mixed Silver Steel" from them. It was mainly in small diameters of up to about 3/8" maximum - but included was one 13" length of 7/8" which I thought that I would never use......................