Drive screw?

[Guy Smiley]

I recently chanced upon a store selling surplus factory equopment and picked up what is supposedly a drive screw. Can someone please tell me what this is and how best to use it with steppers.

It is 1/2" in diameter and has 8 threads running its length. The threads are quite steep that it looks like it only is 1 thread per inch. It came with a red anti-backlash nut that's spring loaded.

Is this useable for home-builts? If so, can someone tell me what (how heavy)its capacity is and what size rails I can use?
Thanks
Check out the list of what's available

[mikie]

wheres the picture of the screw?

only see a product list. This looks like a bloke flogging his own stuff on the zone.

[Guy Smiley]

Sure looks like a bloke flogging his stuff until you re-read the start of the post. I was actually being nice by sharing a find.

Sorry, ni pic available and am just hoping that the learned here can deduce from my description. Oh, and it has a black colored coating.

[DDM]

Is it like a acme style thread? The only ones that I can think of that would be that steep would be the ones like nook industries has. Is it a multiple start thread or a single and how long is it? It my be a good find depending on how you'd like to use it and if all else fails you can just beat your machine with it.

Carl

[Guy Smiley]

Originally Posted by DDM Is it like a acme style thread? The only ones that I can think of that would be that steep would be the ones like nook industries has. Is it a multiple start thread or a single and how long is it? It my be a good find depending on how you'd like to use it and if all else fails you can just beat your machine with it. Carl

Thank you for replying Carl (DDM). I'm starting to somewhat understand the screw but being such a newbie still needs to understand functions of the various designs. The little machine that I completed uses all-thread, check "Hoping it Works" in projects section, so I'm really still dumb when it comes to other thread patterns outside of all-thread and ball. ACME now has me confused because I visualize flat top and bottom with angled sides and now this screw in question has flat bottom, angled sides BUT round top!

This has 8 threads running side by side which probably what makes the threads run real steep and the reason why I mentioned 1tpi. I guess this is what you've referred to as "start". Looking at the end of the screw, I did count 8. It's 48" long.

Like I mentioned in my initial post, I chanced upon a store that sells surplus motion parts. And since I'm planning to build a few more machines for my own use I try to pick up parts when I find them. The reason why I immediately purchased this without full knowledge of what this is is because I don't want somebody to buy it before I do or me not having the cash when I finally need it.

[Guy Smiley]

I posted a list in my first post just wanting to share a find but somehow Mikie made it out to be inappropriate. I do understand somewhat because of the presence of all the advertisers here.

I was thinking that diyers here that can't really afford expensive brand new stuff may find something they need in the list and i may be able to help them with it. I suggest that they purchase as a group to save on freight though as I'm in SE Asia.

This is just in appreciation for all the help extended to me when I was building my machine and started from "0" knowledge on CNC.

[Guy Smiley]

Thank you for mentioning Nook Industries, it is very informative. I found that the above screw is a metric speed screw but seems to be custom because I don't find an 8 start in their catalog. I just need to understand now and do the math. Thanks Carl.