Gallery, Projects and General > Oooops!

Bent boring and facing head...

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philf:
Hi Jim,

I had a Wohlhaupter with a MT3 shank and it was integral to the body. You could tell if the shank was integral from the serial number on the body. I think if Mo.3 appears in the number then it's an integral shank. The same might apply to your Mizoguchi.
 
I found this info on Wohlhaupters on another forum (practicalmachinist) which may also help:

1) The older UPA-3 heads had integral one piece construction. However, the removable shank has been the standard for many years, and most of the heads in use today are of the two piece design.
 
2) If you look down through the hole in the back end of the shank, you should see a hex socket. This is the screw used to hold the shank to the head. If there is no access hole or hex socket, you probably have an old one piece unit. If the hex is there and you want to remove/replace the shank, be careful that you turn the hex bolt in a clockwise or R.H. rotation. (Metric wrench of course) The shank is held to the head with a differential screw design.

Good luck.

Phil.

tekfab:
Hi Jim and welcome,  are you using the Int 40 sleeve or the MT3 ? If you're using the int40 sleeve then it may be possible to machine the mt3 shank to fit another sleeve type.
Mike

jimwhiting:
Hi,

I'm using the MT3 (Warco WM-18 Mill) shank...

I've had a quick look and it is all one piece... I will triple check tomorrow and strip it down completely.

So it looks like I can do a couple of things.

1. Cut the shank off and attach a new MT3 shank somehow...
2. Machine the shank down to something smaller, maybe MT2 and sleeve it back to MT3
3. Try to bend it back somehow?

Oh and any other suggestions... (other than try not to bugger it up :) )

On the plus side, I have had a chat with the seller and he wasn't aware... He's agreed to give me some money back so I have a good boring head... and if I manage to figure out a way to sort the wobble then I'll have the deal of the century... well almost...

Thanks!

-Jim.

jimwhiting:
Here are some pictures of it stripped back... I can't find a join so looking at fitting a new taper or sleeve...

evildrome:
Would it be possible to have someone true up the taper on a cylindrical grinder?

Might work if its not badly out of whack.

Cheers,

 Wilson.

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