316 stainless steel turnind od

[Emilyfinchum]

Looking for chip break suggestions on 316 stainless. Going from half inch down to .38, that's my roughing with doc at around .03 with a .016r ccmt. Feed per rev at s975 f.0025. Finish pass is perfect and holds up great, was only taking 2 passes on the rough until this new batch of material that is considerably different- stringy and harder. We have ran these parts many times on our Swiss machine but this time it's just killing us. Any help is appreciated!

 

[bigjon61]

Sandvik CCMT 3(2.5)1-MM 2025 works well for us in 316

 

[plastikdreams]

I'd have someone hit it with a xrf gun and make sure you got the right material.

 

[wmpy]

Is this on a Swiss machine? Why not take it one pass?
High pressure coolant?
LFV?

 

[guythatbrews]

Peck turn the roughing pass. Adds very little time.

 

[bestworkloo]

Kycera -MS
Mitsubishi -MA VP15TF