Thread indicator for Clausing 100 Mk 3 lathe

[Tomc938]

So looking at that Clausing I picked up last week I see it is missing the threading dial. I have looked around and can’t find a lot of information on it.

I plan to make a new one. Can anyone tell the the anything about the gear that meshes with the lead screw? I think I can figure everything else out from the pictures on the lathes.uk site.

Thanks!

 

[DavidR8]

@Tharm bought my Clausing which had a threading dial. Maybe he'll take some measurements for you.

 

[Tom O]

I’ll take a walk downstairs when I get home and show you mine.

 

[Tomc938]

I’ll take a walk downstairs when I get home and show you mine.

Thanks!

(Although I'm feeling a little awkward with the whole idea of that)

 

[Tomc938]

OK,

So I took a look and now I am confused. My lathe doesn't seem to have place to mount a threading dial. There's one hole there, but not threaded even, and none on the other side.

 

[Susquatch]

Sounds like quite a few of you are gunna work together to make threading dials!

My lathe is quite different. But I'll happily take photos of it for anyone who wants it. For reference, my leade screw is 8 tpi.

 

[DavidR8]

Sorry Tom, I poured through my photos to see if I had a pic of the thread dial on the Clausing but I don't

 

[combustable herbage]

Please Tom don't fall for the I'll show you mine if you show me yours trick again!!

 

[Tomc938]

Sorry Tom, I poured through my photos to see if I had a pic of the thread dial on the Clausing but I don't

There was a picture on the UK lathe site(see below). It’s the same shape as what I’ve seen elsewhere. Getting the right gear information might be the issue.

And now that I look again, it looks like the hole that is there is meant for the dial. Just wondering because it's not threaded. If course I can fix that pretty easy.

 

[Tomc938]

Please Tom don't fall for the I'll show you mine if you show me yours trick again!!

Ah yes, grade 3. Learned a lot that year

 

[Tom O]

Here’s my indicator

 

[Tomc938]

Here’s my indicator
View attachment 45948View attachment 45947

Thanks!

Would you have a chance to measure total height and diameter of the dial? I could trial and error, it but the closer I start the better. I plan to 3D print a prototype.

 

[combustable herbage]

I am curious of the number of teeth for the gear I am guessing its a number based on the leadscrew tpi?
You could probably 3d print the gear and use it because it doesn't have any load.

 

[Prairie guy]

Here’s mine

 

[Prairie guy]

Removed

 

[Prairie guy]

1.325 od, .625 id, .640 thickness, 32 teeth

 

[Tomc938]

1.325 od, .625 id, .640 thickness, 32 teeth

Awesome! Thanks!

 

[Tomc938]

I am curious of the number of teeth for the gear I am guessing its a number based on the leadscrew tpi?
You could probably 3d print the gear and use it because it doesn't have any load.

3D printing for the gear is a great idea! You are right - there should be no load.

 

[YotaBota]

I read somewhere that the dial from an Atlas 12" is the same dial, if you can find one. It's also 32 teeth.

 

[RobinHood]

There's one hole there, but not threaded even, and none on the other side.

Maybe they were stripped out and thus the dial went AWOL?

Or a threading dial was an option and the hole is the taping drill size for the SHCS?

Since you are making a dial from scratch, you can choose the bolt size to fit the hole you have after you re-thread it or repair it with a helicoil.