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Just a quick update - so far reducing the feed near centerline seems to be helping! I am running a 1/2" 4340 and 3/4" 4340 job right now and am up around 1,000 pcs per cutoff. They haven't "broken"...

Just for the record, both inserts in the below pics have 500 pcs of cutting off 1/2" annealed 4340. The insert on the left was F.003 the entire way and the insert on the right was F.003 to X.3 and...

Thanks, man!

1. I dig what you're saying about G96/G97 for smaller parts.
2. Yes - on parts where I'm putting a chamfer I plunge straight in X, then back out in X, then over in Z, then back...

I always put a small chamfer on the back of the part during cutoff...in my case that is the LEFT side of the insert in the pic because the tool is upside down on the cross slide further away from the...

Interesting! I wonder if any gains are to be had on a machine with a sub spindle where the part is supported during cutoff :scratch chin: I read on Sandvik's website they actually recommend not even...

This insert cut off 500 pcs of 1/2" 4340. I don't think there's much to see but just thought I would share. To me it looks pretty good but I couldn't feel with my fingernail the tiny bit of...

Because the HSS tooling does a better job of dealing with the SFM drop-off as you approach center?

Just FYI we're using Master Chemical TRIM OE322 NS

It’s surprising how the 3” on either side of the insert really amplifies how above or below center you are. Kind of fun!

Thanks for the reply! Do you use G96? I’ve heard a lot of people say it's not helpful on smaller diameters...

Is the idea of reducing the feed at, say, X.1875 just to try to compensate for the...

Thanks, Brent. I’ve had trouble detecting wear on these...they “seem” to go from good (not “new” but “good”) to gone quickly. How do you know when to change them? Do you “just know” from...

I don’t have any set of real numbers recorded but, in general, it seems like we are maybe getting between 500 and 2,000 pcs with the smaller and/or easier-to-machine parts being higher around...

5,000 eh!? It sounds like I’m leaving money, parts, and time on the table....I’ll have to investigate this further. Thank you!

Just to be sure - I check my tool center height by 1) facing off...

Thanks, guys! I believe the machines are (relatively) tight for the work they do so I do not thing it is a rigidity problem. The stick out is at a minimum for the tools as they slide up to the...

Ha! Yeah, I know that’s quite a range of operating parameters I threw out there but what you said is VERY helpful...500ish pcs in 1–1/4”ish 4140ish not so bad but expecting tens of thousands of...

I can try to get a close up on Monday.

I cannot commit to an answer regarding if tool life is been affected with the new oil because the new(er) Swiss machines that use the oil are largely running...

We were using Blaser Swisslube oil and we changed to something comparable but cheaper...still oil. There’s a filter bag in the high pressure pump, not sure what the mesh size is though.

I know...

Hi Everyone! I’m not sure we’re getting the most from our parting tools. Everything is low/med-alloy annealed steel (4140, 41L40, 1215, etc) between, say, 1/4” and 1-1/4” diameter. We’re using...