Pratt Whitney Jig Bore
Close
Login to Your Account
Results 1 to 8 of 8
  1. #1
    Join Date
    Dec 2010
    Location
    new orleans
    Posts
    652
    Post Thanks / Like
    Likes (Given)
    1582
    Likes (Received)
    385

    Default Pratt Whitney Jig Bore

    Saw this on Houston Craigslist

    Pratt Whitney 3b under power and he can load on a trailer…..all for 4K

    Man that’s a steal. What a beautiful beast.

    machine shop jig bore mill - tools - by owner - sale

    cc4ef92a-5e27-4eb2-a800-9612b85ac48b.jpgcc4ef92a-5e27-4eb2-a800-9612b85ac48b.jpg

    Damn…it was even rebuilt in 1992

  2. #2
    Join Date
    Jul 2004
    Location
    Houston, TX USA
    Posts
    32,403
    Post Thanks / Like

    Default

    Ball Roll Quill - so fairly modern. Also 8" riser - so its at leaast 10 foot 4" high and over 15,000 Lbs

    48 X 24 travels, and 9" on quill

    Rapids on table and saddle but the only "feed" on the entire machine is the quill

    Genius brother Harry fixed mine up with servo drives on table and saddle - and I fabbed up the mountings for them
    Last edited by johnoder; 08-07-2021 at 09:55 AM.

  3. Likes tim9lives liked this post
  4. #3
    Join Date
    Jul 2001
    Country
    UNITED STATES
    State/Province
    North Carolina
    Posts
    2,229
    Post Thanks / Like
    Likes (Given)
    262
    Likes (Received)
    558

    Default

    Quote Originally Posted by johnoder View Post
    ... Harry fixed mine up with servo drives on table and saddle - and I fabbed up the mountings for them
    Any good pics of this John ? Sounds cool.
    Are the Servo feeds just turning the fine
    feed hand knobs? Direct or belt drive ?

    --Doozer

  5. #4
    Join Date
    Jul 2004
    Location
    Houston, TX USA
    Posts
    32,403
    Post Thanks / Like

    Default

    Sort of on the photos. Basically I took off the two rapid belt drive motors and replaced them with (timing )belt drive servos. In other words you can disable the servo drives by simply "undoing" the clutch in the middle of the big hand wheel - making the big hand wheels still serviceable for final positioning.

    I'll see if I can find the photos and edit them in here

    p1000622sm.jpgp1000624sm.jpgp1000640.jpgp1000641.jpgp1000642.jpg



    Quote Originally Posted by Doozer View Post
    Any good pics of this John ? Sounds cool.
    Are the Servo feeds just turning the fine
    feed hand knobs? Direct or belt drive ?

    --Doozer
    Last edited by johnoder; 08-12-2021 at 06:56 PM.

  6. Likes CBlair, stephen thomas liked this post
  7. #5
    Join Date
    Jul 2004
    Location
    Houston, TX USA
    Posts
    32,403
    Post Thanks / Like

    Default

    These are older than 20 years but seem to get the job done right down to a crawl

    Typical specs are 2.1 NM max stall, 140V and 3100 RPM max with 5/8 output shaft

    20210812_184335.jpg

  8. #6
    Join Date
    Dec 2000
    Country
    UNITED STATES
    State/Province
    South Carolina
    Posts
    51,775
    Post Thanks / Like
    Likes (Given)
    3199
    Likes (Received)
    6047

    Default

    Cool machine but it's market value is negative... i.e cost (way) more in rigging and trucking to get it to scrap yard than it's scrap value.

  9. #7
    Join Date
    May 2003
    Country
    UNITED STATES
    State/Province
    Michigan
    Posts
    3,085
    Post Thanks / Like
    Likes (Given)
    1763
    Likes (Received)
    1543

    Default

    Quote Originally Posted by Milacron View Post
    Cool machine but it's market value is negative... i.e cost (way) more in rigging and trucking to get it to scrap yard than it's scrap value.
    Thank you captain obvious

  10. Likes moonlight machine liked this post
  11. #8
    Join Date
    Sep 2014
    Country
    UNITED STATES
    State/Province
    California
    Posts
    436
    Post Thanks / Like
    Likes (Given)
    111
    Likes (Received)
    89

    Default

    I worked with a guy who's self worth was negative, then again his overall worth was negative. If I dropped this machine on him I wonder if his ruby red boots would curl up at the toes.


Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •