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Finding tool centre height on a lathe

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Jonny:
The scribe type methods only get you some where near unless happen to drop lucky.
Cant beat taking a face cut and altering height to remove pip.

Bogstandard:
A bit of a back against the wall statement there Jonny.

What about tooling that can't be used in a facing off scenario?


Bogs

Stilldrillin:
Most of the tooling I use can be used for facing.

So, I have an (originally), 2" length, of 1/2" dia brass. With a "centre" point turned on one end.

Hold in chuck. Set tool to "centre" height.

Reverse the bar in chuck jaws. Then take a small proving pass across the end face......  :thumbup:





Unless there's already a part finished component held in the chuck.......  :doh:

David D

Jonny:
Not exactly Bogs i honestly cannot think of any type of tooling where you have to do that way.
May be a knurling tool.
Any type of tool that cuts be it boring bars inc internal thread cutting, grooving can be used to face off, same with cut off and grooving tooling, why settle for second best.
 
Quite agree Dave but i dont bother with a point.
Will also show some weaknesses in setup, whether that be tool flex or beds and slides.

Bogstandard:
You are quite right, if you put the tooling into a position where you can use it to face off.

Unfortunately, you then have to move the tooling to a position where you need to use it in it's correct mode of operation.

The advantage of a scribed line technique is that you set the tool to the correct height and then it doesn't need to be touched, as it is done in it's working position.

Rather than arguing over it, you do it your way, I will do it mine, and I will waste not one bit of metal by continually facing off.


Bogs

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