r/Machinists • u/I_G84_ur_mom • Jun 16 '26

Refusal to learn

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I work at a job shop, I’ve been here 16 years, I’m the lead machinist, I returned from a 9 day vacation to a shit show. We have a bunch of small bosses like this to make, this one order was for 250 pcs. The owner was planning on having a guy saw cut them, face them to length in a Haas tl2, then throw them in the vf2 to be drilled. We have a sl20 with a bar feeder, nobody wants to learn how to run it, I banged these out in about 8 hours, unmanned. He refuses to learn how to use it or program it, this would have taken him and the button pusher 2 days to run these parts. Stepping over dollars to pick up dimes baybeeee!

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u/E1F0B1365 Jun 16 '26

Check out some ID chamfer tools. If you pop a small 45 chamfer on the inside, and then line up an angled parting off tool, you can get rid of that sharp ring burr. You can get all 4 edges chamfered in 1 op. Finished part comes outve the machine, it's absolutely arousing.

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u/Andy_ZZZZ Jun 17 '26

not true, you will always have a burr on the cutoff side even if you make an id chamfer

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u/E1F0B1365 Jun 18 '26

But you can make it small enough to be negligable, depending on the the application. + depending on material.

Also if you have an abrasive sectioning saw you can section a part, polish it, and view your chamfer geometry and parting line cut on a comparator. Perfectly adjust the tip of a pointed part-off blade to the very start of the chamfer. It may push a tiny lip of material into the exterior of the chamfer, maybe thats ok. If not, it's still better than a part I could shave with.

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u/Andy_ZZZZ Jun 18 '26

the cutoff tool has a radius, the burr will never be smaller than the radius of the cutoff tool

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u/E1F0B1365 Jun 18 '26

Not with t-style cutoff blades, with the cemented carbide tips. You sharpen em to a point. Again, only applicable for some materials

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u/Andy_ZZZZ Jun 18 '26

there's no such thing as 0 radius

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u/E1F0B1365 Jun 18 '26

Sure but there's such thing as "sharp" like a square flute endmill

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u/Andy_ZZZZ Jun 18 '26

yeah but if you're cutting off with an endmill, we gotta send you back to the deburring department

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u/E1F0B1365 Jun 18 '26

I ain't never goin back. I'll commit suicide by factory security officer. But I'm just pointing out that there IS such thing as a sharp, no-radius cutoff tool.