A Tailstock Raising Block for a Unimat SI1000.

摘要

As stated in my previous article, use of the tailstock at headstock raised level will need the tailstock to be raised to the same spindle level. The headstock raising block is a plain 20mm thick die-casting and, when needed, is inserted between the headstock and base casting. The standard toolpost bolts to the top of the cross-slide, and only needs a raising block to match that of the headstock, but the base of the tailstock is designed to sit on the bed rails. It needs a raising block to position two short lengths of matching rail with the tops of these exactly 20mm above the tops of the lower bed rails and spaced 40mm apart, as shown in principle at A in fig. 1. How best to fabricate a relatively simple aluminium block on which to- mount the raised bed rails? The semi-circular indentations could probably have been milled, but not possessing the necessary machinery and cutters, I decided to reproduce these by drilling and reaming in a built-up 'solid' block.