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Difficulty in drawing...

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Divided he ad:
Well ok, drawbaring I suppose (Yer it's a word!?  :scratch: )


I just got this new mill you see, and well it's got a stupid drawbar with this odd 3/8 16tpi thread on the end of it!

Well, I'm certainly not going to but all my MT3 tooling again! it's all in M12x1.75 thread.


So I figured I'm make a drawbar.... Shouldn't be too hard? Unless you have nothing suitable to make it from!  :bang:

So, I thought up a plan.... This might not work, so in a day or so this post will revert to making a new drawbar after all? But this is what I did instead....

There was an odd drawbar in the bits I got, far too long for this mill, it almost came out the bottom of the spindle. It probably fits something but.... Needs must! (I can always replace it!?)

Difficulty in drawing...


I cut it's thread off and made a new one to M8x1.25
Difficulty in drawing...

Then  made a M12x1.75 thread on a bright mild steel bar (better quality than the drawbar too!)
Difficulty in drawing...

I drilled and tapped it M8x1.25 and made an 8.5mm relief in it.
Difficulty in drawing...


Then altered the drawbar to fit the thread and relief I had made.
Difficulty in drawing...


And finally, threadlocked the one onto the other, held the blank in the vice and tightened using it's own hex. cut it off and trimmed/finished off the new thread.
Difficulty in drawing...


Difficulty in drawing...

And I've still got the original drawbar that came with it that fits the drill chuck that was in it too :thumbup:


Now I'm just leaving it to set while I tell you guys about it  :) 


Tell you if it works tomorrow!






Ralph.

sbwhart:
That should work ralph the wort or worst even  :lol: that can happen is the two bits come unscrewed.

Stew

Divided he ad:
That was my theory Stew  :thumbup: 


Ralph.

CrewCab:
Keep it simple, I like it  :headbang:

CC

AdeV:
Nice work Ralph - but one question, why didn't you just cut the M12x1.75 thread into the drawbar? 

 :smart:

Aaaah, unless the replacement drawbar was already too thin? In which case, nice work * 2 - good piece of lateral thinking there  :thumbup:

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