"Tom Gardner" mars@tacks wrote in message
...
On 1/27/2012 9:51 PM, Howard Beal wrote:
"Tom Gardner"mars@tacks wrote in message
...
On 1/27/2012 8:38 PM, azotic wrote:
Tom Gardner"mars@tacks wrote in message
...
I need to make thousands of fasteners consisting of 1/4" x 4" threaded
rod with a 20 degree bend in the center. The ends will each get a 1/4"
nylon-insert lock nut. I plan on doing the bend on a punch press. I'm
concerned about:

-What grade of All-thread so the rod doesn't crack at the bend?

-How to cut the rod? (parting die on punch press, bandsaw, cut-off
wheel in chop saw, etc)

-How to deburr so the nuts will start?

This is for a new product so I will be ramping up and might have to
change methods according to demand.

Do you need all 4" to be threaded?

Buy 4" threaded studs and just do the bend?

Best Regards
Tom.

I assumed it would be a LOT cheaper to use All-thread even with the
added
operations.

Check the thomas register? Maybe a screw machine shop?

All depends on your shops fixed costs and tooling you have available.
Parting on your punch press will be the most cost effective. Use a
Outside Chamfering Mill to clean up the threads, then bend.

Best Regards
Tom.


I do have a couple of screw machine companies that do other jobs for me
and I do believe that that will be the most cost effective solution when
the quantities are large enough. I need to keep it in-house until the
product takes root.


Thats a tough one. Estimating monthly sales on new products is a bitch.
Been there done that. Sounds like your gonna be stuck with labor
intensive cost until you get enough volume to farm it out.

Best Regards
Tom.
--
http://fija.org/