Emcomat Lathe threading dial mod

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I bought a threading dial for a Sieg mini lathe off Aliexpress and modified it so I can use it on my Emcomat 7 lathe. The description of the item is "Thread Dial Indicator/Metal thread-cutting Chasing dial/SIEG C2/C3" and this was the link on Aliexpress:
www.aliexpress...
The gear is 16 turn to match the imperial lead screw on the lathe. I machined a little spacer to shift the gear down in the body and also added a ring under the gear to take up slack. I also made a small sleeve to go inside the body to adapt from the 6mm hole to the 5mm needed to thread into the lathe.

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2 окт 2024

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Комментарии : 21

@AllenORourke1954 3 года назад

NIce modification Simon, I served my apprenticeship on a Colchester Student lathe nearly 50 years ago, finishing my working days on CNC's, I wouldn't know where to start setting up a conventional lathe up for screwcutting these days, forgotten how to. Can't wait to see the Riley running, always had a thing about them, a bloke across the street had a 1953 RME with the 2.5 engine which was basically a bigger version of yours, he offered to sell me it for 10 quid when I was 17 so the car was 18 years old at the time, what put me off was you could see the road through big rusty holes in the floor pans so I politely declined, I saw the car in a scrapyard about 3 years later and I nicked the Riley badge off the radiator which has long gone missing sadly...

@asciimation 3 года назад

The problem with lathes is they are never big enough! The Emco is still a small lathe but a step up form my original Chinese one in terms of quality. At some point I expect the switches to go on this one (it's a mechanical setup that is known to fail) so I imagine I will be fixing that at some point. The Riley is slow but steady progress needed I think. I have to spread out the costs a little too. I can't just buy all the parts I need up front so it's a matter of getting what I need, when I need it and trying to minimise the postage costs. I still try to do a little every day though.

@chunkyleejones3831 3 года назад

Dito Allen

@campbellmorrison8540 3 месяца назад

Im assuming your Emco is an imperial version, I have a V10P and its metric. I too would like to have a TDI but from what Ive seen its not that easy on a metric lathe and you need different gears for some of the non integer threads like 1.75 etc. Im surprised that mini lathe TDI from Aliexpress meshes with your leadscrew as mine is Mod1, I guess yours is imperial but I would have thought Chinese mini lathes were metric.

@winandd8649 10 месяцев назад

Nice! Want this on my Emco compact 8, but I'm sure I have a metric lead screw.. Hope I can find a suitable threading dial..

@asciimation Год назад

I don't know sorry. I've never actually seen one in person so am not sure if they are the same or not.

@sonogenio Год назад

Ciao mi raccomando attenzione non mettere maglie lunghe é pericoloso bye bye

@chasm6698 5 месяцев назад

There is a hierarchy of dial engagement rules depending on thread pitch. Yours has a 16 TPI leadscrew, so if you're cutting a 16 or 32 or 48 pitch, you can engage the half nut in any position and the tool will chase the thread. You need a more restrictive rule if the pitch is not divisible by 16, yet another if it's not divisible by 8, and so on down to not divisible by 2. It was actually kind of fun to get my head into the numbers and figure it out. Of course, you can always just use the most restrictive rule and that will work for any pitch.

@asciimation 5 месяцев назад

I can never remember the rules since I don't use them enough so I stick to the slow, always engage on the same number technique!

@chunkyleejones3831 3 года назад

Excellent job...

@devilvortex1 6 месяцев назад

I didn't understand how the indicator stops since the gear is always in contact.

@asciimation 6 месяцев назад

It's because when you engage the carriage it starts moving as well. So the gear moves the dial one direction but the carriage movement moves it the other direction so it cancels out. That's why you need a gear with the right number of teeth to match the pitch of the screw.

@metlgandalf Год назад

Do you think this attachment works also with a emco maximat v10p?

@asciimation Год назад

I have never seen on in person so I am not sure this will work on one sorry. If that part of the carriage and the lead screw are similar it should work? From china those little indicators were cheap enough to risk buying one to try.

@jerrypeal653 2 года назад

I think you can shim the dial mounting to get a more lined up engagement.

@danielabbey7726 3 года назад

Just found your channel, and subbed. Always been on the lookout for an Emcomat lathe, but when I saw your Enigma machine and pre-war race car content, I was hooked!

@asciimation 3 года назад

They are nice little lathes. I am slowly adding to mine to make it more usable for what I need to do - mainly Enigma machines and pre-war cars!

@jerrypeal653 2 года назад

Looks a lot like my 8.4 but for the v ways on mine and milling portion, nice little machines .

@asciimation 2 года назад

They are well made machines but suffer the same problem as all lathes, you always end up needing to machine something slightly bigger than your lathe can handle!