Thread: Turret Troubles

Originally Posted by Stustoys

HI Bob,
Whats the second item in the pictures for? I picked up the item pictured on ebay with the thought of modifying it or making something similar for holding threading tools but dont really know what its for.

I think longer drills were held in collets weren't they? Not having the chuck would fix your clearance problems, of course set up would be more painful.

Stuart

Stuart
This appears to be a recessing attachment that fits into the Turret head.
It is used for machining a groove or recess in a bore to take a circlip or O Ring or for recessing the bottom of a bored hole to provide clearance for subsequent operations such as tapping or the like.Also used to make a stepped bore.
The operator after boring or drilling a hole indexes the Turret head & simply feeds the attachment holding a boring bar with the appropriate tool into the machined hole & then uses the hand lever to cause the tool on its dovetailed slide to feed into the workpiece to a predetermined stop & thus produce the recess. After that procedure the operator moves the hand lever on the attachment back to its original setting & the cutting tool is withdrawn. All a very fast operation.
I hope this may be of some assistance to you.
regards
Bruce
ABRATOOL

Bruce,
Thanks, That all sounds right except of one thing, the adjustable stop works on the toolholder in the "forward(?)" position.
Could this be for external grooves?
Or do I have it backwards again lol

Stuart

Stu

My Hardinge version appears to work backwards. I will pull it apart to see if it can be reversed. Rob "Ropetangler" may have more information about yours in his Herbert manual.

Bob.

Don't say anything Stuart

Well now, who ever would have thought........

Maybe they set the tool upside down like a back tool post? as the stop on the in your drawing appears to be in the same place.

Need a spare?

Stuart

Stu,

I imagine the thing is pretty big. Maybe too big for the little Hercus. The body of the Hardinge version measures 80 x 38 x 30 deep. A dainty little thing.

BT

The mounting bar(?) is 1". You could be right the body is about 85x60x30. I'll take some pictures with a rule.
Stuart

Here you go BT