Machining a straight edge - Page 2
Close
Login to Your Account
Page 2 of 2 FirstFirst 12
Results 21 to 28 of 28
  1. #21
    Join Date
    Jun 2008
    Location
    Bellingham, WA
    Posts
    4,099
    Post Thanks / Like
    Likes (Given)
    987
    Likes (Received)
    2234

    Default

    I mentioned the other day that I was not happy with the method I used to scan the sole of my 18" SE. So I made a better "surface gage" using a Mahr tenths-reading electronic indicaror and a 4" diameter steel puck that weighs about 6 pounds. I added a .400" diameter annularly relieved shoe to the indicator tip so that the tip rode smoothly over the shallow grooves made by the face mill.



    Here is a video showing the plunger shoe or puck. I made it out of O1 tool steel and hardened it prior to brief lapping.


    And here are a couple of stills.
    img_6267-1-.jpg


    img_6268-2-.jpg


    Here are a couple photos of the holder or gage base prior to assembly

    img_6250-1-.jpg
    img_6251-1-.jpg


    I figure this tool will come in handy as it will make scanning my machined straight edges prior to shipping a lot more convenient.

    Denis

  2. Likes TGTool, JHOLLAND1 liked this post
  3. #22
    Join Date
    Dec 2015
    Country
    UNITED STATES
    State/Province
    Connecticut
    Posts
    1,097
    Post Thanks / Like
    Likes (Given)
    26
    Likes (Received)
    361

    Default

    That’s pretty slick.
    Is that my 18? Did you scan the whole bottom? Is it really within a tenth over the whole bottom? Indicator working?



    Sent from my iPhone using Tapatalk Pro

  4. #23
    Join Date
    Jun 2008
    Location
    Bellingham, WA
    Posts
    4,099
    Post Thanks / Like
    Likes (Given)
    987
    Likes (Received)
    2234

    Default

    Yes, that is your SE. I cannot easily check the entire sole as I have to suspend it on 2-4-6 blocks. The indicator is working and does repeat accurately. I would not claim a tenth over the entire sole. My initial purpose was to show flatness to .001 or so. Looks like it is much better than that and certainly “good enough.”

    The vial came from Geier and Bluhm. So, I will install it and send the SE on its way.

    Denis

  5. #24
    Join Date
    Dec 2015
    Country
    UNITED STATES
    State/Province
    Connecticut
    Posts
    1,097
    Post Thanks / Like
    Likes (Given)
    26
    Likes (Received)
    361

    Default

    Awesome!, I’m in need of it
    Thanks for the quick turnaround


    Sent from my iPhone using Tapatalk Pro

  6. #25
    Join Date
    Jun 2008
    Location
    Bellingham, WA
    Posts
    4,099
    Post Thanks / Like
    Likes (Given)
    987
    Likes (Received)
    2234

    Default

    Boxed up. It will go to the post office Monday morning and will ship USPS

    img_0192-3-.jpg



    img_0194-1-.jpg


    46abdea6-d470-4abb-a53d-57984b81a1d5.jpg


    img_6274-1-.jpg


    img_6271-1-.jpg
    Last edited by dgfoster; 01-12-2020 at 01:05 PM. Reason: Improved photos

  7. Likes Paolo_MD, JHOLLAND1, rimcanyon liked this post
  8. #26
    Join Date
    Dec 2015
    Country
    UNITED STATES
    State/Province
    Connecticut
    Posts
    1,097
    Post Thanks / Like
    Likes (Given)
    26
    Likes (Received)
    361

    Default

    The 18” arrived today,
    I am very pleased with everything-the overall design, how it feels and handles, and also the workmanship.
    The casting looks extremely nice, with no voids and even the smallest details in the font for your name and the date.


    Your bullet proof packing was appreciated also.
    Looking forward to the 36” and getting to scraping and painting to make them both perfect.

    Thank you very much.


    Sent from my iPhone using Tapatalk Pro

  9. Likes dgfoster liked this post
  10. #27
    Join Date
    Jun 2008
    Location
    Bellingham, WA
    Posts
    4,099
    Post Thanks / Like
    Likes (Given)
    987
    Likes (Received)
    2234

    Default

    Just a note on a new way I am making the little 5/32 hex crooked wrench:

    Yesterday I was finishing the machining of an 18 I am shipping to Brooklyn today.
    Until now I have been either tigging or silver soldering that little bit of hex into the arm of the steel bar to make the wrench. And I had been simply bending the crook into the bar by eyeball. That made a serviceable wrench, but I did not like its appearance. The tool is necessary to tighten the mount screw located at the rear of the vial mount and housing since there is little clearance above the vial and housing and only a fairly narrow space between the tube and base of the vial housing.

    So yesterday I made a simple (some might say crude <smile>) die to put the crook in the bar and I made a hardened O-1 anvil and hollow punch to swage the bit into the bar. The result is a nicer looking and better functioning tool. In addition to improved form and function the two new tools allow the tool to be made much more quickly and conveniently. A single light smack of a 2 pound hammer does a nice job of swaging and bending the bar with the dies is done with just a good squeeze in my Kurt vise.

    Here is the punch and anvil in position to swage the hex bit.
    swage-punch-bending-die-1-.jpg


    The punch and anvil
    swage-punch-bending-die-3-.jpg



    Reaching under the tube to get at the rear mount screw
    swage-punch-bending-die-4-.jpg


    Top view of same
    swage-punch-bending-die-5-.jpg


    Bending die and bent blank.
    swage-punch-bending-die-6-.jpg


    A few more pics in the next post.

    Denis

  11. #28
    Join Date
    Jun 2008
    Location
    Bellingham, WA
    Posts
    4,099
    Post Thanks / Like
    Likes (Given)
    987
    Likes (Received)
    2234

    Default

    Here are a few more pics

    swage-punch-bending-die-7-.jpg


    swage-punch-bending-die-8-.jpg


    The swaged hex in the bar.
    swage-punch-bending-die-9-.jpg

    I could not stand the appearance of the anvil. So I ground its face.
    swage-punch-bending-die-10-.jpg


    The anvil base is relieved to help it rest securely on the backup plate---no tendency to rock.
    swage-punch-bending-die-11-.jpg


    Denis

  12. Likes TGTool liked this post

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
  •