Extractor cut
Close
Login to Your Account
Likes Likes:  0
Results 1 to 6 of 6

Thread: Extractor cut

  1. #1
    Join Date
    Jan 2015
    Country
    UNITED STATES
    State/Province
    Pennsylvania
    Posts
    118
    Post Thanks / Like
    Likes (Given)
    33
    Likes (Received)
    41

    Default Extractor cut

    This is how I've been cutting extractor slots, and it works, so I've stuck with it. Today, I had to cut two for a set of double rifle barrels I'm assembling. There has to be a better way. extractor-cut.jpg

    In addition to the lathe, I have a vertical mill, and I'd like to hang the barrel vertically off the side of the table to cut it, but haven't worked out a good way to hold the barrel yet. Cutting off the table with my Fray would not be a problem.

    I feel like there has to be a better way, but I've been too busy with real work to focus on this. Please offer suggestions for a better way than kludging my lathe to act as a horizontal mill.
    Attached Thumbnails Attached Thumbnails extractor-cut.jpg  

  2. #2
    Join Date
    Sep 2018
    Location
    Posts
    51
    Post Thanks / Like
    Likes (Given)
    0
    Likes (Received)
    20

    Default

    Why not hold it horizontally in the mill vise on your vertical mill and use a keyway cutter of the appropriate size?

    Sent from my Pixel 2 using Tapatalk

  3. #3
    Join Date
    Sep 2003
    Location
    Pacific NW
    Posts
    717
    Post Thanks / Like
    Likes (Given)
    6
    Likes (Received)
    73

    Default

    Your barrel vise or a aluminum version, with interchangeable bushings hanging off the side of the vertical mill.
    Or mounted to an angle plate.
    Or a barrel wrench mounted in the vise.

    I am not a fan of keyway cutters, they seem to have a awful short life.

  4. #4
    Join Date
    May 2011
    Location
    The Buckeye State USA
    Posts
    174
    Post Thanks / Like
    Likes (Given)
    12
    Likes (Received)
    18

    Default

    In addition to what has been mentioned I would add a couple more possibilities
    4" Kurt style CNC Super-Lock Vise 3900-1719
    A vise like this with a vee block hanging over the edge of the table
    Could use a rotary indexer mounted to a sub plate to position the barrel off the edge
    Could use a right angle milling attachment(if your mill will accept one)Basically what your doing now on he lathe

  5. #5
    Join Date
    Feb 2001
    Country
    UNITED STATES
    State/Province
    Arizona
    Posts
    2,208
    Post Thanks / Like
    Likes (Given)
    4
    Likes (Received)
    339

    Default

    If you have a Bridgeport or clone, rotate the turret (which holds the ram) such that the spindle is not over the knee. That way you can hang the barrel vertically from the side of the table. You will need to make some tooling to hold the barrel but it is pretty straightforward. You will need a cylindrical section near the chamber end to hold the barrel so if you are doing some other shape for the finished product, do the milling before losing the cylinder.

  6. #6
    Join Date
    Jan 2015
    Country
    UNITED STATES
    State/Province
    Pennsylvania
    Posts
    118
    Post Thanks / Like
    Likes (Given)
    33
    Likes (Received)
    41

    Default

    I just had a look, and I think I can probably bolt a barrel clamp to the small T-nuts for the table stop on the front side of the table.
    The key way cutter has merit too. Actually, this is the easiest solution, and I think I'll try that first.

    Thanks guys. It can be hard to let go of something that works even when there has to be a better way. I just needed someone to splain it to me.


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
  •