Mystery lathe items

[DAPPH]

This is a trepan. The pilot goes in the end of the tapered shaft held by the grub screw and the cutter goes in the flying shaft also held by a grub screw. A very handy (but potentially very dodgy) tool in equal measure.

Not so bad if used on tin plate screwed to a fixed board and used on very slow gentle feed . Could also be used as a low sped low feed fly cutter for cast iron

I used a tail stock mounted fly type cutter a few months ago turning the tin plate on 20 mm marine ply backer screwed to the lathe face plate and trued up to get a round clean hole 6 inches in diameter in some 5 mm alu plate

 

[DAPPH]

It doesn't feel bakelite. Feels softer.

The tool post is missing is a square plate for underneath unfortunately.

May be an early nylon plastic then circa 1943 onwards ?

 

[DAPPH]

It doesn't feel bakelite. Feels softer.

The tool post is missing is a square plate for underneath unfortunately.

Square plate or inverted Tee nut that slips in the groove of the cross slide ?

 

[GraemeVW]

Square plate or inverted Tee nut that slips in the groove of the cross slide ?

Square plate I think. I'm pretty sure it's from a mk1 student/master as a load of other parts in this box are.