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

[Macds]

Hey fellas,

I had a local company send me 1000pcs of 3/8" hot rolled to thread both ends.
Did it in my small CNC lathe, it was a pain in the ass. with 4' lengths.

They are now wanting to send over batches of 4.5K in lengths varying from 4' to 8'.

Im thinking of building a little machine that can be set for length of round stock, and stops for thread length.
Kinda picturing placing the bar stock in V blocks with pneumatics clamps, and then using rotating die heads to thread both ends at the same time.

Can anyone recommend rotating tooling that will accomplish this? Possibly something that will chamfer the ends as well?

Thanks

 

[Garwood]

geometric head?

 

[Doug]

Landis made (may still make but look for used) many machines just as you describe.

Largest dealer of Landis threading machines in the United States | Stanley Machinery Corp

www.stanleymachinery.com

and yes, they should be able to nick that chamfer in as well.

 

[Macds]

As an update to this post, I looked into Landis heads (new).
15K USD each and 28 week delivery time.

Im going to reach out to Dougs suggestion and see what happens. Doing these in the CNC lathe sucks, way too much labour involved IMO.

 

[Mud]

A used geometric die head and chasers is a few hundred, will go lots faster than single pointing. A 9/16" size would be my choice.

Do you have room for a junker turret lathe?

 

[Doug]

As an update to this post, I looked into Landis heads (new).
15K USD each and 28 week delivery time.

Im going to reach out to Dougs suggestion and see what happens. Doing these in the CNC lathe sucks, way too much labour involved IMO.

Try over at smalltools.com

 

[Mud]

There are other brands, Geometric seems to be the most available as far as chasers goes. There are many models, we use a standard manual lethe model in the cnc and rigged up a bar to close the head when the turret indexes.

geometric die head for sale | eBay

Get the best deals for geometric die head at eBay.com. We have a great online selection at the lowest prices with Fast & Free shipping on many items!

www.ebay.com

 

[Mud]

Forward to 1.00

 

[Kustomizer]

Hey fellas,

I had a local company send me 1000pcs of 3/8" hot rolled to thread both ends.
Did it in my small CNC lathe, it was a pain in the ass. with 4' lengths.

They are now wanting to send over batches of 4.5K in lengths varying from 4' to 8'.

Im thinking of building a little machine that can be set for length of round stock, and stops for thread length.
Kinda picturing placing the bar stock in V blocks with pneumatics clamps, and then using rotating die heads to thread both ends at the same time.

Can anyone recommend rotating tooling that will accomplish this? Possibly something that will chamfer the ends as well?

Thanks

How about a fair size drill press laying on its back with your above mentioned v-block clamps and a geometric die head in the spindle, when you are not doing this job you can have the drill press back. you would have to make an adaptor to fit the die head to the drill press, I think the smallest one I have has a 5/8 or 3/4 shank

I think I have a couple of those die heads ( low milage ) in a box here somewhere and a fair size pile of chasers, I don't need 2 them any more.

 

[vmipacman]

How about a fair size drill press laying on its back with your above mentioned v-block clamps and a geometric die head in the spindle, when you are not doing this job you can have the drill press back. you would have to make an adaptor to fit the die head to the drill press, I think the smallest one I have has a 5/8 or 3/4 shank

I think I have a couple of those die heads ( low milage ) in a box here somewhere and a fair size pile of chasers, I don't need 2 them any more.

But how would that be better than using the geometric head in the lathe? At least the lathe can bar pull and part off.

I might try bundling and sawing to length, then using soft jaws in the mill with 20-30 locations and using the geo head In the mill.

hah. Nevermind Reread that these are 4’ long. Got confused with another thread.

 

[Garwood]

Might be a tad long for a vmc.

Did it in my small CNC lathe, it was a pain in the ass. with 4' lengths.

They are now wanting to send over batches of 4.5K in lengths varying from 4' to 8'.

 

[Goff]

You can get straight thread dies for a powered Rigid pipe threader. I have used 1/2-13 dies in the past. Do not know about 3/8" dies.

 

[Macds]

How about a fair size drill press laying on its back with your above mentioned v-block clamps and a geometric die head in the spindle, when you are not doing this job you can have the drill press back. you would have to make an adaptor to fit the die head to the drill press, I think the smallest one I have has a 5/8 or 3/4 shank

I think I have a couple of those die heads ( low milage ) in a box here somewhere and a fair size pile of chasers, I don't need 2 them any more.

I REALLY like this idea!
I could make a fixture table using just a drill press head even.... hmmm

Mind if I contact you regarding a die head or 2?

 

[Kustomizer]

I REALLY like this idea!
I could make a fixture table using just a drill press head even.... hmmm

Mind if I contact you regarding a die head or 2?

That would be fine, I will start looking in the morning, we just moved and the new shop is too small to unpack, I will start looking.

 

[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?

 

[Macds]

DM sent

 

[Doug]

You can get straight thread dies for a powered Rigid pipe threader. I have used 1/2-13 dies in the past. Do not know about 3/8" dies.

I dunno 'bout you....But the last thing I want to doo is stand next to a screaming universal motor, and wearing off my fingerprints
to open/close the damn chuck....all day.

 

[Kustomizer]

DM sent

I sent info, did it not get there?

 

[Herding Cats]

I would think the easiest way would be to clamp a bunch of them in a fixture and then rigid tap them with a die nut in a horizontal or a vertical with an angle head.

At that quantity I would entertain the idea of building a pneumatic fixture.

 

[Mud]

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?