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Thread rolling device

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ksor:
I got some thread rolls M14-M16, M18-M22, M24-M27 like this:



I the first place I need some articles describing how it works "when you roll a thread" - any links ?

Then I would like to make some kind of "device" for the tail stock to ROLL the thread on instead of cutting with a die - maybe you got any links to plans ?

Darren:
I have no idea how a thread is rolled, but imagine a very big machine is used  :scratch:

sbwhart:
Hi Ksor

We had some thread rollers (Alfred Herbert) where I working didn't roll threads with them though used them to roll another type of feature in one of our products, because of the loads involved they were strong robust machines and the processes was done under oil.

The diameter of the thread blank is made to the thread efective diameter, you squeze in and push out metal at the same time, rolled threads because of the material grain flow are stronger than a machined thread.

This is a pic of a thread rolling box as used on a capstan lathe I guess you want something similar to this.



Hope this helps

Stew

bogstandard:

--- Quote ---I have no idea how a thread is rolled, but imagine a very big machine is used
--- End quote ---

Not really true Darren.

I bought some old castings off a car boot for a squid.

They turned out to be thread rollers for putting the thread on the end of bicycle spokes.

I tried offering them FOC to a museum, but they refuse to take them because they said they had enough examples, so one day they will be turned into something else.


John

Darren:
My, aren't they interesting little chaps ... be a shame to destroy them but thanks for showing as that was an eye opener  :smart:

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