Free 186 More Best Homemade Tools eBook:  
Get 2,000+ tool plans, full site access, and more.

User Tag List

Page 3 of 4 FirstFirst 1 2 3 4 LastLast
Results 21 to 30 of 35

Thread: Shear tools for lathe work.

  1. #21

    Join Date
    Mar 2018
    Posts
    10
    Thanks
    0
    Thanked 5 Times in 3 Posts

    Denis G's Tools
    Quote Originally Posted by tonyfoale View Post
    Denis,
    I didn't invent the name, that is in common use for this type of tool.
    The action is far from burnishing, it is a true cutting action, as I am sure that anyone who has used one would testify to.
    OK, Thanks Tony. I've never seen one before, so you taught me something new.

    186 More Best Homemade Tools eBook

  2. The Following User Says Thank You to Denis G For This Useful Post:

    tonyfoale (Mar 31, 2018)

  3. #22
    Supporting Member tonyfoale's Avatar
    Join Date
    Nov 2016
    Location
    Spain
    Posts
    1,549
    Thanks
    679
    Thanked 2,628 Times in 705 Posts

    tonyfoale's Tools
    Quote Originally Posted by olderdan View Post
    Canobi,
    For some years now I have been running my SB lathe with an inside out poly v belt which is super smooth and quite cheap to buy. I have tried scarfed leather and flat grinding belts but this is the best.
    I like flat belt drive as it is quiet and has saved a few tool breakages (works like a fuse).
    Attachment 22976
    I use poly V belts wherever I can now, so far inside in though. They flex almost as well as a flat belt, and so can be used with small pulleys, they can deliver high torque without much slipping. Like flat belts they run smooth with little vibration. With small pulleys and the light weight of the belt they don't centrifuge off the pulleys much and so maintain their torque capability up to high speed. The pulleys are easy to make in a lathe, especially if you have a DRO.

    The largest one that I use is on a valve train test rig which I have spinning for long time periods at up to 12,000 rpm with about a 30 mm driven pulley, the driver pulley is around 140 mm. as seen in following pix.

    Shear tools for lathe work.-spintron-03.jpg Shear tools for lathe work.-spintron-04.jpg Shear tools for lathe work.-spintron-05.jpg Click thumb nails.

    I used a much smaller one on my 5 hp. 6000 rpm Bridgeport as featured previously at http://www.homemadetools.net/forum/h...6661#post84115

    Also on my multipurpose grinding head at http://www.homemadetools.net/forum/d...-grinder-67127

    Shear tools for lathe work.-pulleys.jpg Shear tools for lathe work.-tp-grinder-14.jpg

    2000 Tool Plans

  4. The Following 6 Users Say Thank You to tonyfoale For This Useful Post:

    j.bickley (Mar 31, 2018), KustomsbyKent (Apr 2, 2018), mwmkravchenko (Mar 31, 2018), Seedtick (Mar 31, 2018), that_other_guy (Jan 14, 2019), Tule (Apr 1, 2018)

  5. #23
    Supporting Member Floradawg's Avatar
    Join Date
    Jul 2018
    Location
    Flora, MS
    Posts
    622
    Thanks
    570
    Thanked 130 Times in 97 Posts

    Floradawg's Tools
    Thanks Tony.
    Last edited by Floradawg; Jul 25, 2018 at 05:08 PM. Reason: showed up on the wrong thread
    Stupid is forever, ignorance can be fixed.

  6. #24
    Supporting Member Floradawg's Avatar
    Join Date
    Jul 2018
    Location
    Flora, MS
    Posts
    622
    Thanks
    570
    Thanked 130 Times in 97 Posts

    Floradawg's Tools
    I keep trying to reply to your thread about a lathe shearing tool but it shows up here. Anyhow, thanks for the info on the lathe shearing tool I will try it.
    Last edited by Floradawg; Jul 25, 2018 at 05:12 PM.
    Stupid is forever, ignorance can be fixed.

  7. #25

    Join Date
    Sep 2015
    Location
    south Wales, UK
    Posts
    13
    Thanks
    0
    Thanked 5 Times in 4 Posts
    Shear tools have been used for some time by us shaper fans and I can vouch for the fine finish obtainable with my Elliot 10M.
    More info from the very helpful NEMES web-site: Kay Fisher's Metal Shaper Column 43

    Regards,

    Brian

  8. #26
    Supporting Member Floradawg's Avatar
    Join Date
    Jul 2018
    Location
    Flora, MS
    Posts
    622
    Thanks
    570
    Thanked 130 Times in 97 Posts

    Floradawg's Tools
    Thanks for the link. Interesting. The only time I used a shaper was in a technical training program that I went through when I worked for MIchelin in Lexington, SC. We had a project to complete using hand filing to a precise flatness and size and we were required to use a shaper on part of the piece. I still have it. I'll take a pic or two and post them if you would like to see it.
    Stupid is forever, ignorance can be fixed.

  9. #27

    Join Date
    Sep 2015
    Location
    south Wales, UK
    Posts
    13
    Thanks
    0
    Thanked 5 Times in 4 Posts
    Yes please - if it's not too much trouble.

  10. #28
    Supporting Member Floradawg's Avatar
    Join Date
    Jul 2018
    Location
    Flora, MS
    Posts
    622
    Thanks
    570
    Thanked 130 Times in 97 Posts

    Floradawg's Tools
    The only tolerance figure I remember is 0.02mm flatness for each face of the cube. This was achieved by holding a small precision square so that the base was held against the face and tilted to approximately 45 degrees. If when held up to the light any light could be seen under the edge of the square then that area was low. By filing away the high areas total flatness could be had. When I finished filing mine I was skeptical (being a natural skeptic) so I checked mine with an indicator on a stand and on a surface plate. Sure enough it was within 0.02mm. The cube is approximately 50mm in diameter. The actual figure wasn't important. They wanted it the same across each pair of faces all the way around. This was achieved by locking a vernier caliper on the dimension of the first two opposite faces. The same amount of resistance when slid along the faces indicated that the dimension was the same. I don't recall how we determined the squareness of one side to the next. The shaper was used to bevel the edges. The base design was up to us, sort of. I don't recall how much was up to us. Mine was draw filed along the sides. I shaped the narrow top ledge on the shaper and filed the ramp flat. I don't recall how the ramp was roughed out. It may have already been done for us. It's been 30 years and some of it is difficult to recall. The pen holder of course was ready made. The Mr. Bib was cut out on a CNC wire EDM machine. They even used it to cut out gears. Amazing. They gave me the Mr. Bib paperweight when I left the company.

    Shear tools for lathe work.-die.jpgShear tools for lathe work.-die2.jpgShear tools for lathe work.-die3.jpg

    Shear tools for lathe work.-die4.jpgShear tools for lathe work.-mrbib.jpg
    Stupid is forever, ignorance can be fixed.

  11. #29
    Supporting Member MountainMan's Avatar
    Join Date
    Jul 2018
    Location
    Conway,SC
    Posts
    63
    Thanks
    72
    Thanked 84 Times in 20 Posts

    MountainMan's Tools
    Wow nice work Floradawg,,,I've been by that plant a few times. Mostly buying up tools off craigslist
    Dave
    "I have not failed...I've just found 10,000 ways that wont work"
    Thomas Edison

  12. #30

    Join Date
    Sep 2015
    Location
    south Wales, UK
    Posts
    13
    Thanks
    0
    Thanked 5 Times in 4 Posts
    Excellent craftsmanship and thanks for sharing.
    Shame about what looks like rust on the support!

    Regards,

    Brian

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

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
  •