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

Search:

Type: Posts; User: Forrest Addy

Page 1 of 60 1 2 3 4

Search: Search took 0.09 seconds.

  1. Aloris style holders aren't difficult to make. I...

    Aloris style holders aren't difficult to make. I probably made a dozen sets at one time or another. The two critical feature characteristics are the size over pins and the dovetail angle. I forget...
  2. Yup, I bought a DA 215 new in 1971. Good machine...

    Yup, I bought a DA 215 new in 1971. Good machine for general lathe wotk, nice selection of spoeds and English and metric thread pitches. Thery're pretty durable provided you oil the ways regularly.
    ...
  3. Link to a trepanning channel detailing tools and techniques

    This link takes you to a YouTube channel devoted to one man's approach to trepanning large centered holes in barstock on a big lathe.

    YouTube

    The presenter in his several YouTube videos speaks...
  4. It aint the stout that makes the 30XXX taper...

    It aint the stout that makes the 30XXX taper preferable. Its the positive keyed spindle nose drive. No up-spindle socket damage possible.
  5. Endorse DIY. A level is easy to make from most...

    Endorse DIY. A level is easy to make from most any material stable enough for the purpose.

    And I hear you. The V in a precision level base is mosty a PITA but I suppose it's become stupidly...
  6. Replies
    14
    Views
    780

    No need to. Remember in my ramblings above...

    No need to.

    Remember in my ramblings above where I mentioned suspension spring? I use a plain old home center screen door spring for a tool balance. The whole arrangement consists of a length of...
  7. Any #30. R8 is handy for small cutters but has...

    Any #30. R8 is handy for small cutters but has limited driving tougue for shell and face mille. The R8 is simply not suited for shell mills, face mills, sweep tools, etc. Personally I'd prefer NMTB...
  8. Richard said it all on the topic of precision...

    Richard said it all on the topic of precision scraping in heated environments, mitigating heat sources, thermal equalibrium, etc.

    The only thing I could add is don't let your sweat fall on the...
  9. Replies
    14
    Views
    780

    The factory rubber inserts aren't that expensive....

    The factory rubber inserts aren't that expensive. They poop out with time and should be replaced when they become hard or raggedy. Keep a spare in the scraper box along with the spare brushes, the...
  10. TDmidget said it best. I've used plenty of old...

    TDmidget said it best.

    I've used plenty of old stock vitrified wheels. The Federal Stock System stumbled on a trove of WW II era vitrified grinding wheels that fitted our large Mattison surface...
  11. Thread: 2020

    by Forrest Addy
    Replies
    8
    Views
    817

    What!? We gota a new number? It'll be July before...

    What!? We gota a new number? It'll be July before I get the correct year on the checks I write. Day-um!

    Stuck in the teen-zeys.
  12. Richard, you're a fine teacher of precision...

    Richard, you're a fine teacher of precision scraping. You have world wide influence in a very small community. You deserve credit for conserving a valuable craft that's gradually fading from the...
  13. You provide free catered lunch with your classes,...

    You provide free catered lunch with your classes, Richard? We did in the classes I taught. Pizza, sub sandwiches, Chinese food, even had a crawfish boil in Savannah.

    We ate it right there at the...
  14. Replies
    30
    Views
    2,577

    Ramp the surface plate down to a two wheeled...

    Ramp the surface plate down to a two wheeled wheelbarrow. If you pad the tray, the surface plate won't get scuffed up. Roll it down the path to the loading zone.

    Got a couple of friends? Big husky...
  15. Replies
    49
    Views
    3,124

    I have Mitutoyo thread mikes 0 -1 and 1 - 2 and...

    I have Mitutoyo thread mikes 0 -1 and 1 - 2 and Shars to 6" there after. The Mitu are maybe 30 years old and the Shars 7. Both are excellently made but vastly different in price. I suspect the Mitu...
  16. Replies
    11
    Views
    798

    Handy compressed air formulae

    Here's a link:

    USEFUL_FORMULAS_FOR_COMPRESSED_AIR.pdf

    There's standards for compressed air calculations. Never go by manufacturer's specs without vetting them. ALL comsumer grade and prosumer...
  17. Sorry I got here so late. There is always...

    Sorry I got here so late.

    There is always tension in the wall of a tube that when split resolves into a diameter change. This is no big deal when the wallls are thin and the split bushing is...
  18. Replies
    12
    Views
    857

    Make/scrounge wedge style leveling jacks such are...

    Make/scrounge wedge style leveling jacks such are used to level and algn smaller high end machine tools. Suoport wedges are OK but sometimes you need to clamp one end to the table to keep them in...
  19. A little trick for cleaning dingey slip stones.

    A micro-epiphany:

    I was visiting relatives who showed me their latest gizmo: a knife sharpener that used stones mounted on a sliding rod which guided it at a constant angle over the cutting edhe...
  20. Resource bokk for new owners of ancient machine tools

    YouTube

    Takes you to a free PDF of a turn of the last century millwrights handbook. There is much in it that may be interesting or of historical value having little practical use today.

    However...
  21. You can make your own lung friendly soluable oil...

    You can make your own lung friendly soluable oil coolant with 9 parts water, one part vegatable oil, and enough lecithin to emulsify. You gane get a lifetime supply of lecithin on Amazon. Wotks great...
  22. Yup. Major suggestion: pick a DRO whose cross...

    Yup. Major suggestion: pick a DRO whose cross slide scale can be gutted and buried in the cross slide between the nut and the saddle casting clearance wall. Some midification/surgery may be required...
  23. Replies
    8
    Views
    1,180

    Good ol' Pratt & Whintey, I presume. My career...

    Good ol' Pratt & Whintey, I presume. My career shop had a string of six along the west bay aisle. Very slow and not that great on positional accuray but they could do stuff in their work envelope...
  24. Replies
    8
    Views
    1,180

    Cutting wide keyways on a shaper

    Ever shape a wide keyway? This is how it's done.

    YouTube

    Note how the gentleman in the video cuts the center from the wide keyway he layed out in the hub. Then he uses a full width tool to cut...
  25. Replies
    14
    Views
    1,102

    Mike the tap over wires being careful to measure...

    Mike the tap over wires being careful to measure over the cutting diameter and not some part of the radial relief. Use this figure to cut the external thread.

    Don't fall into the trap of going...
Results 1 to 25 of 1500
Page 1 of 60 1 2 3 4