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Did you see the red marks on one of the sprockets? For a 8 start internal thread with specific start and end orientation. More thread milling! Used to do all that in the lathe, that's a whole

Probably not, this is caveman technology! I do like it though. Maybe here's a pic or 2 of the application. Dave Matticks

shouldn't you be out making parts for the space shuttle or something?

I know it's not Craftsman or Atlas but a little food for thought. You can really do a lot with a little if necessary. Note the gear motor coupled to the drive motor and chain drive with compound

Bill The pictures explain the prosses GP --------------------------------------------

I would be interested in hearing more about what you did, and how you went about doing it. I? hope some day to be skilled enough to make a rifling machine, and it looks like what you've done here

Hope I can find the pics of part of my never ending project from a few years ago. Needed to cut 1" pitch on a 4" diameter part 24" long. Here's the kicker, 2" root diameter. Don't remember the angle

No, complete tail stock Sent via the Samsung Galaxy S7, an AT&T 4G LTE smartphone

Interesting! Never saw or looked for one.I have an old Enco tailstock turret with a mt2 shank, goes in the tailstock quill.?Never going to use it but it's here.Dave? Sent from my T-Mobile 4G LTE

No. The tailstock turret referred to is a stand-alone unit. It is lever operated and has six adjustable stops. Also, it takes 3/4” tooling. The one that has a 2MT arbor and can fit into the

Atlas made three types of tailstocks for the 10” and 12” lathes. The standard tailstocks (the ones that came with the lathes) are not interchangeable. The 12” ones (early and late) are 1.000”

Does the turret mount in the tail stock quill GP --------------------------------------------

Thanks, there is a 10" turret tail stock there, just wondered if it would work on my 12" as is. Sent via the Samsung Galaxy S7, an AT&T 4G LTE smartphone

It will not be vertically aligned with the spindle center. You might be able to machine something to add to the base and raise it up, or just buy the right tailstock. Lots of them come up on eBay.

Will a 10" Atlas / Craftsman tailstock fit on a 12" tailstock base? Is the only difference the thickness of the base?

So many good things came frome these thermodynamic principles.? Internal combustion engines, refrigeration, air conditioning, steam turbines for power.Science is fun-Jody

Hi Bruce You make a good point that a low heat conductive piston might be better. Here is a video of a copper tube and wood piston type fire piston. https://youtu.be/YKJksRIBzNc I think the coolest

Neat. Aluminum is highly heat-conductive. Steel might have been a better choice. It's denser, but a thinner wall could be used, so it might come out in the wash. What's really impressive is when

I searched "spherical bronze bushing" under Google Images and got a lot of hits. I didn't follow up on them. Bruce NJ [email protected]> wrote:

Maybe not applicable in this case , but what most machinists I have worked would do is to cut the thread with a single point tool up to 90% or so , and then finish it with the relevant tap or die