Hemingway engraving tool

[Mike WaldronParticipant @mikewaldron61652]

[Mike WaldronParticipant @mikewaldron61652]

Going back to the cleanness of the graduations, Ian Bradley (one half [?] of Duplex) suggested using a brass bar held against the revolving steel dial to remove the small raised swarf left by the tool.

I’ve never tried it – I only used Wet & Dry wrapped round a flat stick (never Emery) to even up things afterwards. The new cross slide, topslide and leadscrew dials fitted on the lathe in the photo above (fitted long after it was taken) were done using setups for 100 and 125 on the spindle. I didn’t really cut quite deep enough on the leadscrew dial, so it’s a bit feint.

Oddly, the original cross slide dial was very hard to see, and unusually worn. There was no topslide dial, as you see in the photo, but there now is a square ‘lattice’ design dial.

Leadscrew dial to be re-done at a later date.

Mike

[JasonBModerator @jasonb]

Why mount the rotary table on the lathe. Do it on the mill where there is room and hold a stationary tool in the spindle if you don’t want to use a rotating tool.

I did not have any straight knurls at the time I did this but indexed it with the R/T and a bit of pointed HSS in the collet

[bernard towersParticipant @bernardtowers37738]

GHT uses a old smooth file covered in oil to remove the burrs. I use the same method and for me it works.

[Andrew TinsleyParticipant @andrewtinsley63637]

Sorry Bernard,

I must admit I didn’t take in the request for an email.

Andrew.

[Mike WaldronParticipant @mikewaldron61652]

You might all be relieved to know that Charles Woodward is alive and well, and thanks to the secretary of the Rugby SMEE I’ve managed to get in touch with him.

Thanks all for the suggestions along the way.

Mike

[Nigel Graham 2Participant @nigelgraham2]

Regarding cutters, as Jason mentioned them rather a long way back, I successfully engraved a scales on a stainless-steel strip in the mill, using a cutter ground free-hand from a broken centre-drill or some-such. The shape does not seem very critical as long as it is not too wide.

The basic form is a very slender, tapered D-bit rather like an injector reamer but with a finer tip.

If using the lathe carriage, a simple stop can be improvised using a suitable block and borrowing the clamp-pad and bolt from the fixed steady (assuming the work itself does not need that of course!).

[bernard towersParticipant @bernardtowers37738]

Thats the way GHT engraved the vernier strip for the UPT table.

[david bennett 8Participant @davidbennett8]

My go-to tool for engraving dials is a Unimat sl/db. The lever headstock saves a lot of dial twiddling.Stops are easily arranged. It looks like the same principle as the Hemingway kit.

dave8

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