doublegunshop.com - home Forums General Discussion DoubleGun BBS @ doublegunshop.com Glazan Screw

James, I know the type of lathe you need, made plenty of screws myself, but never, ever, could you make a 8 size or a 10 size screw 3/8" to 1/2" in length, with a tool bit. That's why I said you need screw machine lathe that uses acorn dies, usually set up in a turrett post and cuts the same size thread, finishes the head and parts it off.

With all due respect, I've made plenty of small screws by "single-pointing" them on a good little Monarch 10 EE toolroom lathe. If the screw is sufficiently long for its diameter, it may require that a live center be used to support it. But for a Parker triggerplate screw, I don't think you'd need to do that.

Now doing it with an acorn die or a retractable, interchangable jaw thread chaser head is very cool, no doubt. But, a thread chaser head is usually reserved for makeing multiples of parts since they have to be adjusted for pitch diameter before a "run". Besides, they're pricey and I don't have one. So, in a pinch, I resort to single pointing a lot.

Chuck, I think that we are talking of two different chasers. The one I'm talking about is just for re-chasing some damaged threads. Hex shaped and usually turned with an ajustable wrench.

As far as turning an 8-36 or a 10-36 x 3/8" long or shorter in a lathe, I still find it almost impossible to do. Your cuts can only be maybe .002-.003 at a time, the tool has to be ground dead sharp, and dead on center. The lathe speed in conjuction with your indexing speed, and pull out time along with your tool post getting in the way. But if you say you can do it, who am I to agrue with you.
IMOP why you would do it this way, instead of using an acorn die, is beyond me.
By the way Merry Christmas

Bill,
I purchased a set of the parker screws from Galazans for a trojan I'm working on (the very same trojan that your stock blank is now gracing), and the trigger plate screw did not fit. When I called, I was supposed to get a call back from a smith, and never did...so I called back, and got hung up on. I guess they figured out why they don't fit??

At any rate, I'm not sure what your solution is? If you find a decent solution I would be interested in having a screw done as well. I don't have access to a lathe or the tools required to make my own

David
My next try is to have a friend TIG weld the slot in the old screw and recut it.
bill

JDW,
I usually just do it this way when I don't have a die around for the thread size I want or want a better fit.

When I single point, I set a 2 or 3 inch travel dial indicator on the bed and dial out and drop out the carriage leadscrew at a predetermined point. I've gotten pretty good at this over the years and can usually singlepoint a thread in less time than it takes to go buy a die. When you have good equipment and familiarity, it can go really fast.

Sounds like a better solution Bill, as my screw was outright missing!

All: Any idea on the cost of having one of these off-size, non-standardized screws duplicated? Would it be easier to have someone make one from scratch, or to modify the galazans screws I have?

Thanks,
Dave