RFQ: Threaded Posts

[dsmdude]

We are in need of an intial order amount of 100 threaded posts. The material is 1 1/2" dia hot or cold rolled steel. Threads are 1 1/4" - 7 and the end of the stud has a taper to make it easier to thread in to a tapped hole. After the intial order we would need these in qty of 100-200 approx every month. It would be nice to get these within 1-2 weeks from ordering. Payment via Paypal, credit card, or open invoicing would work best. A quote with you supplying the material would be appreciated. We will close this quote on July 27th. Please PM, email or call with your bid or questions. Thanks! Nathan @ PIK Manufacturing

email address is cheapbrackets@yahoo.com
phone is 320-251-2222

[AMW]

Hello Nathan, I posted the following question on your post @ RFQWORK.com:

How much of a "Lead Chamfer" would you prefer @ the start of the Thread?
> The height of this thread (( 1 1/4 - 7 )) is .0876." Would 3/16" Lead Chamfer be acceptable to you or would you want to go larger?
>> Please advise!

Please email us @ applied.machineworks@yahoo.com

Regards
Al
__________________

[dsmdude]

Hello, a 3/16" chamfer would work great. Thanks! Nate

[dsmdude]

We are closing this RFQ for the time being. We have run in to some problems with the design and manufacture of the product this part was intended for. The reciving end of the threaded stud was supposed to be a 1 1/4" threaded inside DOM tube that we were going to tap on our manual lathe. Having never taped anything that large we did not realize that it wouldn't be a simple operation to say the least. I'm not sure the product would be cost effecient if we farmed out both the stud and taping of the tube. We are working on a redesign and exploring other options for the time being. we may still do the project but are putting it on hold for now. Thanks to all who submited a quote for their time, I really wish this would have worked out as planed.

[Geof]

Perhaps I am being cheeky sticking my nose in...but I have never let that stop me .

Have you considered silver soldering your 'post' into the end of the DOM? Having read, and replied, in both your threads it seems to me you have a product that is close to ideal for silver soldering.

You would bore the end of the DOM to provide a step against which the post would sit and then simply sit the post in the vertical DOM and silver solder the joint.

If you maintain a good tolerance so the clearance is between about 0.002" and 0.005"., radial measure, silver solder will wick in perfectly by capillary action and will give you a joint strength that could approach 80 to 100,000 tensile depending on the properties of your DOM and post material. Certainly you will get a joint that is at least 80% of the tensile strength of the parent materials.

I am using the generic term silver solder but if you want to Google and find more info use 'braze 450'

[dsmdude]

Hello, the silver solder sounds ok but this joint needs to remain completly adjustable. Thanks! Nathan

[Geof]

Okay, here is another approach. Your adjustability requirement would appear to be the reason the DOM has to be tapped for quite a depth...which is difficult.

Is it possible to change your thread size to one with an OD slightly smaller than the ID of the DOM; or increase the size of your DOM slightly?

Then you make short threaded rings using leaded steel; tapping this in a manual lathe may be practical, leaded steel is very different to the DOM material. The suggestions you received to thread cut first and finish with a tap are entirely practical with leaded steel. The rings need only be a few threads long.

Then simply silver solder these rings into a small bored out section in the ends of the DOM.