Might prove useful one day

[Ian PParticipant @ianp]

Some time ago when making some parts out of 316 stainless steel, l broke the tip off a 3/16" diameter centre drill (Slocumb bit). The broken bit was jammed in the bottom of the cone and as the part had already had a lot of machining time spent on it I was keen to reclaim it.

The method I used was very simple and did not even require me to take the job out of the chuck.

Using one of the thin abrasive disks in a Dremel type tool I ground a clearance slot (same width as broken tip) across the diameter the into the broken end of the centre drill leaving the conical cutting edges untouched.

I then used the same cutter to cut a bit deeper into the material until the broken tip had no metal l left around it (it fell out by itself).

Not an earth shattering revelation but it might prove useful one day.

Ian

[Ian PParticipant @ianp]

[Sub MandrelParticipant @submandrel]

Neat! Obvious when explained, but I would never have thought of it.

Thanks Ian,

Neil

[Boiler BriParticipant @boilerbri]

It's really annoying when that happens. Usually just as you mention – when you have nearly finished the part. I made my axles for the Sweetpea i am building last Sunday. On the last cut i nudged the cross slide handle and took a great big cut out of one of the bearing surfaces. Luckily i had another piece of steel so i made another. Strange, when you remake a part it never seem to take as long!

Nice tip.

Bri

[Ian PParticipant @ianp]

Strange, when you remake a part it never seem to take as long!

Bri

That has given me a eureka moment.

Make the second part first, it will speed the whole job up!

Ian

[john kennedy 1Participant @johnkennedy1]

Did the same thing last night doing my Firefly carbs (making 2 engines) I took the centre drill out and ground it off at 45 deg,redrilled and knocked the cone off with a centre punch. Not my idea,read it on here somewhere.

[Boiler BriParticipant @boilerbri]

lol Ian

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