Stainless steel

[Brian Rice 1Participant @brianrice1]

how do I stop stainless steel work hardening when turning in lathe?

[Brian Rice 1Participant @brianrice1]

[Roy MParticipant @roym]

Depending on the grade of stainless,(some is free-cutting),a general rule of thumb would be lower the surface speed, and/or increase the feed rate. You also need to keep the job cool, and the tool keen. Treat the material as tough, and grind your tool accordingly,( take note of approach angle and top rake). Or choose correct insert tip. If the material is really really tough, and you are using tool steel,you may have to keep re grinding your tool. Remember that you have to, somehow, remove the offending hard part of the piece before starting to turn with your re-ground tool.

Roy M

[Ady1Participant @ady1]

I would only use carbide on S-Steel, a decent lathe with good stiffness is important too

Backgear can be handy, especially when drilling, less heat

Edited By Ady1 on 08/04/2015 00:31:57

[Bodgit Fixit and RunParticipant @bodgitfixitandrun]

I vaguely remember somthing about the coolant used being important as well but can't think what it was. Can anyone help please?

[Roger WoollettParticipant @rogerwoollett53105]

The advice I have been given is "never ever let the tool rub", When drilling keep the pressure on, when turning keep the feed going.

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