Mark out and drill the holes, Photograph 6. As the holes C on the bottom frame are
the same distance apart, marking them out whilst the surface/height gauge is set
will be a good idea. Follow this by drilling and tapping the part.
This is a simple part and needs no manufacturing detail. However, make it at this
stage as it is required for the next.
Top Frame (2) and Bottom Frame (6)
Assemble these with the base and clamp and position onto the lathe's bed, the clamp
only finger tight. Place a drill chuck into the lathe's spindle fitted with a centre
drill and mark the lathe's centre position onto the frame using the tailstock barrel
to feed it into the centre drill, Photograph 7. Open up using a drill 8.2mm diameter
though you may wish to change this value, explanation later.
You will need a rotary table of at least 150mm diameter to use the following method
otherwise it will be necessary to use the method I suggest for the travelling steady
Fit a parallel shank centre in the milling machine cutter chuck and use this to centralise
the rotary table,Photograph 8, and fasten this in place, also locking both table
axis. Next,centralise the assembly ,Photograph 9 and secure it using the method shown
in Photograph 10. Using this method of securing the assembly, rather than that shown
in photograph 9, permits the assembly to be mounted so that the cap head screws can
be placed head up enabling both the bore, and the groves for the steadies arms to
be made at the same setting.