turning 316l feeds and speeds

[veritasproject]

Can any one help me i am new to turning steel. i looked online for feeds and speeds and was unable to find anything. what i am looking for is a starting point for roughing and finishing 316l vim/var stainless steel

thank you

[Colin Gilchrist]

Daniel,

 

This is really going to depend on the tooling you are using. Most of the time you can get really good specific information from any of the tool manufactures.

 

316 is not especially hard to cut, but depending on the type of insert you use you are probably looking at a range of 200-500 sfm and .01 feed per revolution.

 

What kind of tools are you using?

[Scott Lundin Shopware Inc.]

I have turned quite a bit of 316L stainless with Mitsubishi US735 grade roughing at 325 SFM and .008-.010 IPR feed.

[Goldorak]

we cut a lot of 316 here

 

sumitomo CNMG @ 350SFM and .012FPR got the best result and tool life

[Avs_Fan]

We run a LOT of 304VAR & 316L with Seco CNMG,DNMG,VNMG TP3000, 540 - 560sfm, .010"IPR., light DOC @.06" radial or less.

[Philcott]

There are specialty stainless's out there that are manufactured with controlled grain structure. This allows much better manageability with higher speeds and feeds and way less aggravation.

 

Look for 316 project 70, 316 Maxx or 316 70+.

 

Have a look here for project 70

[Steve Hattori]

+1 on Phil's post- we have run tons of 316 proj 70 at 800-1000 sfm...Sandvik inserts. The premium for the Carpenter material was more more than made up by the increased machinability and consistent results. Cheap, off-the-shelf material would knock us back to 300-400 sfm and who knows what for tool life.