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316 SS troubleshooting
- Thread starter jephw
- Start date
- Replies 13
- Views 1,743
Milland
Diamond
- Joined
- Jul 6, 2006
- Location
- Hillsboro, New Hampshire
How rigid is the setup, very stiff or flexible? You don't want to bounce a cutter in any steel if you can avoid it.
I'd look at decreasing stepover and significantly increasing SFM and feed. Let speed recover what you lose in aggressive width of cut.
I'd look at decreasing stepover and significantly increasing SFM and feed. Let speed recover what you lose in aggressive width of cut.
mhajicek
Diamond
- Joined
- May 11, 2017
- Location
- Maple Grove, MN, USA
Machine? Holder? Specific cutter (brand and part#)? Stickout? Runout? Depth of Cut? Stepover? Part rigidity?
Milland
Diamond
- Joined
- Jul 6, 2006
- Location
- Hillsboro, New Hampshire
Stub endmill? If not, change over to one. Is that .187" depth in one go? I'd step in, maybe .040" a pass, then do a .030" step over, but at faster S/F. That setup isn't too stiff when compared to a more conventional milling op.
And how tight is the milling spindle? When was it last rebuilt?
And how tight is the milling spindle? When was it last rebuilt?
Milland
Diamond
- Joined
- Jul 6, 2006
- Location
- Hillsboro, New Hampshire
Sure,try it. But I'd get some stub endmills if that's an op you do a lot of. And I'd still check your spindle, as that's an endmill killer if it's got slop.
MaxPrairie
Hot Rolled
- Joined
- Jul 9, 2015
I would go 200 sfm and 8-10ipm, whatever that is in ipt it's less than 2 per tooth. Stubby would help if you run shallow stainless in the future.
Rapid_Tech
Aluminum
- Joined
- Oct 27, 2014
- Location
- Toronto
As others have mentioned get a stub endmill, definitely with a corner rad, .01-.02" is plenty. If you aren't familiar with them, DeBoer Tool outside of Toronto (Mississuga to be exact) makes a really nice stub endmill, called the X-mill, with corner rads.
I haven't seen anyone mention it yet but COOLANT, COOLANT, COOLANT!!! And lot's of it, right at the cutting edge.
I haven't seen anyone mention it yet but COOLANT, COOLANT, COOLANT!!! And lot's of it, right at the cutting edge.
Quite often I do what you're doing there with a similar setup (although my Haas is likely of a lot lesser quality than your lathe). I find that the 4000RPM limitation of live tool puts me on the lower end of the feed and speed recommendations. On 316 I slot light and slow and the endmills seem to hold up well. I use Kenna's Gomills. I've got the fancier ones, Harvi, etc, but still prefer Gomills. I also find that 316 is often different from batch to batch and vendor, not sure why.
DouglasJRizzo
Titanium
- Joined
- Jun 7, 2011
- Location
- Ramsey, NJ.
A little more SFM, I think. Chipping is usually due to not enough speed.
