Chatter in groove cutting

[phelop]

Hi,

I have a small lathe (9x20) and I have chatter problem when I try to cut oring groove inside a piece. I have try to slow down the speed, level up and down the tool, lock the carrier ect. The part is 5/8 hole in stainless steel.

Regards

 

[T Bredehoft]

Use a narrower tool, cut your grove then widen it. If it still chatters, make it narrower.

 

[Ulma Doctor]

Your tool appears to be dull

 

[markba633csi]

Agree with Mike, your tool needs to be much sharper, with more relief. I suspect you also still have a rigidity issue somewhere. Stainless can be tough though, especially on small, light machines.
Once it begins to work-harden the cutting can become really difficult.
-Mark

 

[phelop]

Ok Thanks

 

[MrWhoopee]

It appears that your groove is actually a counter-bore, open to the end of the part. If so, try feeding the tool longitudinally (boring) instead of plunging with the cross-feed, taking small bites.

 

[Nogoingback]

What type of stainless steel is it?

 

[KevinM]

I have the same lathe (soon to be retired). You will never get rid of chatter with the stock compound mount. There are 4 bolt mounts (http://bedair.org/clamp/9x20clamp.html) that help tremendously but a plinth is the way to go. With the plinth you do away with the compound and the associated flex.

 

[phelop]

What type of stainless steel is it?

304

 

[phelop]

I have the same lathe (soon to be retired). You will never get rid of chatter with the stock compound mount. There are 4 bolt mounts (http://bedair.org/clamp/9x20clamp.html) that help tremendously but a plinth is the way to go. With the plinth you do away with the compound and the associated flex. View attachment 345697View attachment 345698

Ok nice !