New Boring Head received-Questions about boring bar indexed-?

[Chris MateParticipant @chrismate31303]

Ok< two companies replied they cut the boring bars.

So I continued on the lathe:

Below 37mm stickout it works ok, no sound, good cut, so in the lathe the usable stickout for this 150mm bar is 35mm.

The Iscar bar is at 55mm stickout and ok, but thats in a holder in the quick change toolpost.

I hope its different for the mill, and not a case where I must buy a 75mm boring head to get a bit deeper cut at 18mm boring bars, theres not a huge price difference between these two boring heads.

[Chris MateParticipant @chrismate31303]

Ok< more experimenting interesting difference with lathe(Subject moves around, bar stand still) ver Mill(Subject stand still bar moves around.

Lathe:
Here this bar fails at 37mm + longer stickout, unusable>

Mill:
Here the bar makes it to 65mm stickout to my surprise, cut the bar off at 65+30mm=95mm long now,

Photos added:

[Michael GilliganParticipant @michaelgilligan61133]

That should do nicely, Chris

… it even looks ‘in proportion’

MichaelG.

Edited By Michael Gilligan on 01/08/2023 17:50:49

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