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Hi Peter: I bought some steel that was too hard to saw. I built a big fire in the back yard and annealed it for hours. When it cooled I could cut it, but it was still tougher than mild steel. You

This chart is missing the M14x1mm which is 12.75mm Get Outlook for Android<https://aka.ms/AAb9ysg> ________________________________ Sent: Tuesday, September 5, 2023 12:57:37 PM To: Carl

Drill sizes for metric tapping https://www.carbidedepot.com/formulas-tap-metric.htm ________________________________ Sent: Tuesday, September 5, 2023 12:49 PM To: [email protected] <[email protected]>;

I tried to bore out and thread one of these to M14 x 1 - on a Unimat 3 ! ?They are made of tough stuff. Wrecked an M14 tap, although I had bored it generously. (BTW surely by definition the minimum

Hello: I was told tap drills in metric are simple: screw size minus pitch, so M14 - 1mm = 13mm tap drill. 12.75 might be 100% thread, but not much stronger than 75%. Carl.

Ah, I understand! Hey, at least you didn't have to single-point that thread! I think my best by date was about 38 years ago. But I have seen folks who should know say things that scare me. I'm 68 now.

Yes I tapped the brass for the set screw, but I also cobbled the set screw together, not trivial on silver steel, which was the material closest to hand at the time. So I used a die for that - I

very nice! Best Regards John

12.75 is the drill size for an M14 tap ________________________________ Sent: Tuesday, September 5, 2023 11:56 AM To: [email protected] <[email protected]> Subject: Re: [Unimat] end mill holder I got

I got one with a 8mm hole, ER-11, IIRC, with the intent to thread it M12x1 for my SL/DB machines. It's here somewhere! ;) IIRC, M14x1 needs a 13mm tap drill? I have a pair of very nice tungsten

Had to use a tap to thread the set screw hole. Possibly to thread the spindle end, too, though that can be single-point threaded if you have small enough tooling. IIRC dies are used to put external

There is an old military maxim: If it's stupid, but it works, it ain't stupid! Sure, you don't want to get your knuckles too close to it in use, but it works, right? That's all you need. And a regular

jjg tools on ebay.co.uk offers an er16 collet holder in 12x1 and 14x1 Best Regards John

You could buy one of these for 10=15 dollars and then tap the end for 14x1mm and you are done:

“Die-ing”, not “tapping”. Wrong gender, so easy to confuse nowadays.

I’m a certified beginner. This was one of the first successful things I made. Yes I know the set screw arrangement is ‘unusual’, but I made it by tapping some silver steel / drill rod.

theres one on ebay with collets - https://www.ebay.co.uk/itm/364418596418

Mert offered partially-machined end mill holders.

Can you get away with using a drill chuck to hold an end mill? Probably. Maybe. Sometimes. :) On a Unimat the forces are likely to be lower than on larger machines. BUT! The end mills you're using on

Hi Gang: It is easy to drill and tap a drill chuck to fit Unimats, I've done it to chucks up to 1/2" capacity. I mostly use the 1/4" chuck converted in 1973. While you can hold a milling cutter in a