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Harold Hall

Workshop Projects

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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.

 

Clamp (8)

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.

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Rotary Table, aligning the workpiece
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Aligning a Rotary Table
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10

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 9

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 8

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 6

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 7