Search Results - Practical Machinist - Largest Manufacturing Technology Forum on the Web
Close
Login to Your Account

Search:

Type: Posts; User: Conrad Hoffman

Page 1 of 60 1 2 3 4

Search: Search took 0.05 seconds.

  1. Replies
    33
    Views
    1,078

    I'm still looking for the knob on the machine...

    I'm still looking for the knob on the machine that sets the tolerance.
  2. The human brain has all manner of biases that...

    The human brain has all manner of biases that make audio discussion and evaluation a futile waste of time that goes on forever. FWIW, I'm perfectly happy with an old pair of Sony MDR-V4 phones and...
  3. My preference would be a note, but I think a GD&T...

    My preference would be a note, but I think a GD&T runout call-out would be the place to start.
  4. GD&T is great if everybody in the chain fully...

    GD&T is great if everybody in the chain fully understands it. Well, that leaves me out! IMO, concentricity is a call-out that should almost never be used. It doesn't mean what everybody thinks it...
  5. IMO, once you use a face mill with the right...

    IMO, once you use a face mill with the right inserts and the mill trammed correctly, you'll never consider anything else. Boring heads are for boring.
  6. Replies
    8
    Views
    720

    The Harig looks great and should work great after...

    The Harig looks great and should work great after a tune-up. I question the wisdom of a wide wheel on these machines and you'll certainly have to balance it. IMO, changing bearings on a Boyer-Schultz...
  7. Replies
    11
    Views
    784

    You might get lucky here, but maybe try a post...

    You might get lucky here, but maybe try a post over at photo.net
  8. Lacking more info, I'll assume a can of Mother's...

    Lacking more info, I'll assume a can of Mother's Mag Wheel Polish could give the required finish.
  9. A while back I wanted to do a custom pulley for...

    A while back I wanted to do a custom pulley for one of the less popular proprietary belt profiles. Seemed like an easy thing. Ended up being a f---ing rabbit hole and I eventually gave up and just...
  10. That sounds like it might be a diamond turning...

    That sounds like it might be a diamond turning operation.
  11. Replies
    15
    Views
    793

    Hone is great and you can sometimes stack thin...

    Hone is great and you can sometimes stack thin parts and do them all at once to get around the PITA of thin parts. You should have no trouble at all honing L/D ratios of 2:1 or more. At their very...
  12. Replies
    47
    Views
    1,835

    You're going to have to add weight opposite the...

    You're going to have to add weight opposite the handle. I'd put a shaft through the hole and rest it on rails, just like balancing a grinding wheel. I don't like two handle wheels, but adding an...
  13. At work we always have chucks mounted on 1/2"...

    At work we always have chucks mounted on 1/2" stub arbors, maybe 7/8" long. Easy to get in and out.
  14. The High Speed Hammer Co. was here in Rochester....

    The High Speed Hammer Co. was here in Rochester. I remember driving by the place and every time I saw the sign I'd think, "Man, it sure must be loud in there." I think they might still exist with a...
  15. I've done something similar using a cast iron lap...

    I've done something similar using a cast iron lap and diamond rolled into the lap. This is very different than lapping with a slurry. It's old school but it works. Also see American Lap Company
  16. Oil in the lungs is really bad. Almost like...

    Oil in the lungs is really bad. Almost like vaping! Buy the right stuff and quit messing around.
  17. An oldie but goodie- have a look at the 592 and...

    An oldie but goodie- have a look at the 592 and 733 video amps.
  18. Designers that design too close to "doable"...

    Designers that design too close to "doable" usually end up with expensive designs and high failure rates. Start with what's typical for a given process, then add a safety factor. If the answer isn't...
  19. Backlash is of little concern. I'd get a wedge...

    Backlash is of little concern. I'd get a wedge type AXA QC toolpost, Phase II plus a bunch of tool holders from CDCO. Don't extend the tooling and try to keep the cutting edge within the envelope of...
  20. Replies
    56
    Views
    27,798

    Thanks- I've always found the Hardinge metric...

    Thanks- I've always found the Hardinge metric threading setup a poorly documented mystery. This helps a lot.
  21. NIST has a bunch of stuff related to uncertainty...

    NIST has a bunch of stuff related to uncertainty including some kind of on-line calculator. Google will turn it up if you do a site specific search. An example is...
  22. Replies
    14
    Views
    1,593

    The crack might or might not have anything to do...

    The crack might or might not have anything to do with the fall and could have been there since the beginning.
  23. Replies
    5
    Views
    664

    Thanks. Surprised not more replies. I have some...

    Thanks. Surprised not more replies. I have some import punches that have what appears to be a huge included angle, yet they work fairly well. I usually have no internal taper, just an angle on the OD.
  24. Replies
    30
    Views
    2,130

    Just a note on vacuum chucks- you can suck as...

    Just a note on vacuum chucks- you can suck as hard as you want, but the most force you'll ever get is 14.7 pounds per square inch, the result of atmospheric pressure. A 50 HP vacuum pump can't make...
  25. Replies
    5
    Views
    664

    Hole punch angles

    I often find myself making hole punches for things like gaskets and paper templates. Are there any generally accepted angles for sharpening that both cut well and hold up well?

    edit- I'm talking...
Results 1 to 25 of 1500
Page 1 of 60 1 2 3 4