Project ... Myford M type lathe

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vtsteam:
Does your tool holder have a height adjusting screw? -- I don't see one in the photo. If not you could add one. Just a vertical screw about 6mm threaded through the block that bears against the topslide. It adds both stiffness to the tool, holder adjustment ease, and repeatable height setting.

Eugene:
Steve,

Thank you for the Gingery Ref; I already have the series and find it inspirational and good fun. There are some things I'd like to make such as the two jaw, but I'm holding back until the lathe is running well with a modest set of tools.

The tool holder doesn't have an incremental adjustment and is one reason it's hard to set an accurate height; you need three hands. The existing holder is case hardened to a fair depth so drilling and tapping would be problematical unless I took a chunk out of each face with a diamond tool in a Dremel or the like, neither of which I have. :( The set I propose to make will certainly have adjusting screws; I'm already chopping up bits of steel for the blocks and I'll colour case harden them too just for swank.

Eug

vtsteam:
Eugene, the main reason I mentioned the adjustment screw is actually to add stiffness to the toolpost -- it makes a big difference to chatter -- and particularly when parting.

It might be possible to drill a hole with a masonry drill. The problem would be threading -- but a serviceable possibility is just a length of threaded rod through the hole with nuts on either end, top and bottom to pinch the toolholder between them.

If you want to do it fancy, turn a short press-in flanged tubular nut to fit the hole at the bottom, put it in ice water to shrink, press it in with the vise, tap it, and add a conventional adjustment screw.

lordedmond:
The case hardening is easy to deal with no diamond tools required

Ok here's how get it good and hot a nice red will do and let it cool slowly very slowly

This will soften the CH after you have done the work just reheat to red again and quench in water that will restore the CH

Of course you will need to do a clean up after

Btw the case hardening compound you can buy now is junk with a capital J

Try to get some proper Kasenite but it will be difficult as the good stuff had traces of cynanide in it and our nanny state or EU has banned it

Stuart

lordedmond:
Vtsteam
The CH will only be a few thou deep anyway so threading will not be a problem after softening

Stuart

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