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  1. Replies
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    Not exactly sure about the DMU duoblocks. ...

    Not exactly sure about the DMU duoblocks.

    But at that price I think you're getting into the DMC FD Duoblocks which have turning capability as well as HMC-style twin pallet changers, which are...
  2. Part Failure: 3D Printed Titanium Handlebar at the Tokyo Olympics

    A rider on Australia's track cycling team suffered a crash in the Team Pursuit at the Tokyo Olympics when his 3D printed titanium handlebars snapped.

    Luckily for his three teammates, he had just...
  3. Replies
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    1,703

    QHD (1440p) 27" works for me to get around the...

    QHD (1440p) 27" works for me to get around the scaling issues in Windows.

    QHD or 4K 32" might also work.
  4. The carwash DI resins will work fine. They just...

    The carwash DI resins will work fine. They just have a very limited life.

    If you want an RO system, you can get a drinking water system for $200 off Amazon. The DI stage is optional. The rest...
  5. Fans don't do a thorough job on small holes. It...

    Fans don't do a thorough job on small holes. It helps that it's a horizontal, but the thru-tool air will do a much better job.

    The folding fans work the best for everything else.
  6. PM member dstryr has four Grobs. I trust his...

    PM member dstryr has four Grobs. I trust his judgement.

    The horizontal spindle and the ability to flip the pallet upside down will make a noticeable difference in chip evac and automation...
  7. Replies
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    2,658

    Don't fix it. If I were buying it and saw...

    Don't fix it.

    If I were buying it and saw that the previous owner attempted to hide the damage, I'd be suspicious of what else was wrong with the machine.
  8. Replies
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    3,796

    Just to confuse everyone a bit more, a "mil" can...

    Just to confuse everyone a bit more, a "mil" can also be a milliyard, 0.036", or a millimile, 63.36".

    Useful for measuring #64 drills and short people, respectively.
  9. Well yes, of course there's a mismatch error...

    Well yes, of course there's a mismatch error threshold in the spindle RPM as well as axis positioning, and yes, it's an old concept, like almost everything e lse in manufacturing.

    But like any...
  10. Agreed, that's a big one. It's already...

    Agreed, that's a big one.

    It's already enabled some level of crash-proofing in certain machines. Maybe not in a full rapid move, but certainly in a feed move under, say, 150ipm.

    The machine...
  11. Replies
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    It dawned on me earlier today that GM's...

    It dawned on me earlier today that GM's commitment to all-electric may have less to do ICE vs Electric and more to do with fundamental tech changes happening or about to happen:

    1a. Self driving...
  12. Pie jaws, wide jaws, or machinable collet pads. ...

    Pie jaws, wide jaws, or machinable collet pads.

    How many do you need to make?

    The 0.150" lip on radius probably exceeds the available travel of the chuck. You'll probably need to remove one...
  13. Replies
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    16,226

    I like this idea: Making the Most of EV Batteries...

    I like this idea: Making the Most of EV Batteries with Vehicle-To-Grid
  14. Replies
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    Your best bet to reduce vibration is to reduce...

    Your best bet to reduce vibration is to reduce your ap. Greg's recommendation for 0.5mm ap seems spot on.

    What color are your chips? If they're not blue, you can spin faster and/or feed harder...
  15. Replies
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    Makes sense to get a third. Keep it all within...

    Makes sense to get a third. Keep it all within the same family.

    While their machines aren't perfect, Okamoto as a company doesn't overpromise and doesn't take short cuts.

    24x48 takes you out...
  16. How far in are they breaking? Hydraulics...

    How far in are they breaking?

    Hydraulics have pinch points ("rings") and don't grab the tool uniformly down the entire bore.
  17. I think you can safely rule out converter size...

    I think you can safely rule out converter size and wiring size. Our VF5 and UMC500s are wired with 8awg on 40A breakers.

    At 246/246/244 your voltages are on the high side.
  18. Replies
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    1,312

    How many passes are you taking? Sounds like...

    How many passes are you taking?

    Sounds like you're trying to hit it in one shot. Take a spring pass or two and comp the radius as needed to hit your diameter.

    Tools dull quickly in hardened...
  19. 700 sfm should be perfectly fine. Full slotting...

    700 sfm should be perfectly fine. Full slotting endmills run the slowest at 500 SFM. Everything else runs faster. We run our facemills between 800 and 1000 sfm. Dry of course.
  20. More inserts means higher feed rates, but...

    More inserts means higher feed rates, but possibly lower ap depending on the insert size and geometry. So maybe you feed twice as fast but you only take half the axial doc. Net cycle time isn't...
  21. Gray iron has about 2/3 the rigidity of steel but...

    Gray iron has about 2/3 the rigidity of steel but roughly the same machinability as 1018.

    The net result in your case is the need to dial back the parameters.

    The vibration damping...
  22. Anything over 4xD stickout can be chattery even...

    Anything over 4xD stickout can be chattery even in carbide.

    HSS has about 1/3 the rigidity of carbide, so even worse.

    Long flute lengths further reduce rigidity, partially because you're...
  23. Mitsubishi AXD4000, 1.25" shank, 1.5" cutting...

    Mitsubishi AXD4000, 1.25" shank, 1.5" cutting diameter. Hold it in a milling or hydraulic chuck.

    https://www.orangevise.com/content/pm/axd4000.jpg
  24. Our M140 can be moved with a 5500-lb pallet jack.

    Our M140 can be moved with a 5500-lb pallet jack.
  25. We have an M140, the predecessor to the M200. ...

    We have an M140, the predecessor to the M200.

    It was originally purchased for a part family that absolutely required turning and has been repurposed for a new part family that absolutely...
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