Idea for powered die heads to thread both ends bar stock simultaneously

[Herding Cats]

I attended a sale of a shop that did thread rolling, they made fasteners. The thread rolling machines had 2 plates grooved to match the thread pitch, and the part was squeezed between the 2 plates, and one plate was moved laterally to roll the part between them.
I wonder what is involved to get set up to do that?

I think the stock needs to be turned undersize since rolling the threads would "expand" it

 

[Vancbiker]

I attended a sale of a shop that did thread rolling, they made fasteners. The thread rolling machines had 2 plates grooved to match the thread pitch, and the part was squeezed between the 2 plates, and one plate was moved laterally to roll the part between them.
I wonder what is involved to get set up to do that?

One of the larger screw machine shops in my area has some of those. Some of them with bowl feeders. Don’t recall seeing them doing anything with more than a 5/16”or so thread. Fastest threading I’ve ever seen. Less than a second per part.

 

[Herding Cats]

I've seen videos of it being done on some pretty large threads. IIRC most ARP fasteners are produced in the manner since it results in a stronger work hardened thread.

 

[Vancbiker]

I've seen videos of it being done on some pretty large threads. IIRC most ARP fasteners are produced in the manner since it results in a stronger work hardened thread.

I know all the ARP fasteners I’ve used in my Mitsu 4G63 builds have been rolled. I don’t know what machines they use.

Something I have wondered about in regards to those fasteners is how concentric and parallel the pitch diameters are between the threads on each end of a stud. They must be pretty close since I’ve never noticed any appreciable runout when screwing studs into the block.

 

[Garwood]

ARP would be a neat place to tour.

 

[Kustomizer]

Well, I went right to the cabinet where they used to be and only the larger one was there, I looked where the chasers were and only the larger ones are there so I am going to say I lied and only have one. It is an "Enco 9/16" it is in good working order and is of the type you can do ruff/finish passes if you want, I did on a bunch of 304 years back. I see ones like on ebay though not as nice of shape for 40 bucks right now, how about $100. bucks for mine and the drawer of chasers, you pay the shipping?
View attachment 1324
View attachment 1325
View attachment 1326
View attachment 1327
View attachment 1328

I guess he doesn't want this, it is boxed and ready to go, anybody else interested?

 

[Garwood]

I don't want to step on any toes, but that sounds like a deal I could make use of. Paypal work?

 

[Macds]

I guess he doesn't want this, it is boxed and ready to go, anybody else interested?

Still interested. Im waiting on a quote for the chasers I need for the project.
Ill call again in the morning.

Ive not been able to find them online anywhere, so dealing with the Canadian distributor for Quality Chaser.

 

[Kustomizer]

I will hang loose, we lost contact some days ago and I ass-u me'd