JAMES BEGGS AND CO. BOTTLE FRAME ENGINE - completes the main frame before moving on to the bearing pedestal - Part III

摘要

Now the top recess can be machined and the neck of the casting bored to size. Now for the tricky bit, change to a self-centring chuck and use soft jaws that can be machined out to receive the top flange. Give tailstock support as shown in photo 7 and bring the bottom flange edge to finished diameter. Set up the fixed steady on the freshly machined flange edge and remove the tailstock support. Another photograph (photo 8) shows this arrangement. The extended base can now be machined away to give a finished flange thickness, at the bottom, of 5mm and the bottom should be bored out to 40 millimetres.