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Recent content by gregormarwick

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    2.375in hole in 17-4

    Twin/triple rough boring heads pull much more torque than an insert drill. Especially in a gummy long chipping material like condition A 17-4 when you have to really push the feedrate to break a chip. They're fantastic when they fit nicely in the torque curve of the spindle, when they don't...
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    Boss bought B&S CMM Without TESA Reflex Control. Massive Paperweight?

    I'm not familiar with that specific machine, but I suspect based on the recent faulty display thread that the only way you'll get a control for that machine is to buy another one. You could retrofit it with a Deva kit, but I doubt that it would be worth the time/money investment for that...
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    looking for trouble

    You both noticed that some fuckwit has put a mach retro on that though :ack2:
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    2.375in hole in 17-4

    All cylindrical shank insert drills have a flat or a whistle notch. 880 drills have a flat. 60mm 880 is a 40mm shank.
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    2.375in hole in 17-4

    Forget about a spade drill, that is an insert drill job.
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    Sort of OT - naturally occurring magnetism?

    That is interesting, even though I had to google the units! So it seems that this physical location is located directly between two polarised anomalies. However these units are extremely small right? Is that really a likely cause? These are well cared for hand tools, or even tools that are...
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    2.375in hole in 17-4

    Ideally, I'd hit that hole with a 60mm insert drill. Your 30HP may or may not be able to drive a 60mm drill depending on your torque curve, but I'd expect it to struggle. A condition is going to cause headaches no matter what, prepare for chip evac problems and bird nesting if your mill isn't...
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    Sort of OT - naturally occurring magnetism?

    Here's one for the physicists (geologists?) in our midst... About 18 months ago I, in a round about manner, ended up taking over my and setting up in my retired father's workshop after ~20 years in a different part of the country. I learned the trade here with dad in the early 2k's before being...
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    Sandvik Cartridge CA tooling

    Same here, large diameter boring heads, and a few smaller tools but not spinning too quick because of the materials being cut... All the same I've never had one of these move in cut, they take a pretty solid grip because of effectively being clamped into a vee. There is probably no published...
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    Have you ever met a machinist that was better than you?

    Honestly no, however the machinists I've met and worked with in my career have all set a pretty low bar IMHO, and also I am not without my crutches - I'd be pretty much dead in the water nowadays without my cad/cam software for example as I haven't hand coded a part in basically two decades. I...
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    Why do they want thousands for a heat shrink tool machine?

    As is your right - but if you quote someone on a forum the expectation of a response is implied. It's childish behaviour to solicit a response and then proclaim you don't care. Now, since you clearly have absolutely no useful wisdom to impart on this subject, why don't you follow your own advice?
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    Why do they want thousands for a heat shrink tool machine?

    Then don't quote me in your bullshit responses.
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    New type of anti-vibration bars - MAQ AB

    Since Sandvik's patents expired a few years ago lots of others have jumped on the damped bars, basically copying Sandvik, but rarely matching them in performance IME. Stumbled across these this morning that are a little different: https://maqab.com Seems to be an evolution of the original...
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    Why do they want thousands for a heat shrink tool machine?

    Very funny, but does nothing to refute me. If the induction machine is so obviously superior it should be trivial to prove me wrong, right?
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    Ongoing unrest in Russia

    I didn't claim it had never happened before, only that it's unusual.
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