Harig Steptool Relief Grinding Fixture Alignment Bar
Close
Login to Your Account
Results 1 to 7 of 7
  1. #1
    Join Date
    Jan 2005
    Location
    San Francisco Bay Area
    Posts
    277
    Post Thanks / Like
    Likes (Given)
    3
    Likes (Received)
    19

    Default Harig Steptool Relief Grinding Fixture Alignment Bar

    I have a Harig Steptool relief grinding fixture but not the alignment accessory used to time the workpiece to the cam. I found a picture of the accessory but I have been unable to figure out how it is used. Can anyone give me some tips on making and using an alignment fixture?

  2. Likes gerritv liked this post
  3. #2
    Join Date
    Mar 2016
    Country
    CANADA
    State/Province
    Ontario
    Posts
    120
    Post Thanks / Like
    Likes (Given)
    113
    Likes (Received)
    69

    Default

    I'm disappointed that no one has responded, a friend and I are trying to figure out the same accessory. Seems items such as this never make it with the sale of the main item.

    Gerrit

  4. #3
    Join Date
    Jun 2012
    Country
    UNITED STATES
    State/Province
    Michigan
    Posts
    9,789
    Post Thanks / Like
    Likes (Given)
    3312
    Likes (Received)
    3514

    Default

    All the step tool fixtures I have used the alignment fixture is simply a center finder so at the peak of the cam your cutting lip is on center.
    So just an eyeball use post or a post with a short swing horizontal finger to show the fixture center line.

    With a tilt fixture (not Harig step tool) the alignment fixture sets its base off the fixture spindle not off the table.

    Many grinder hands just eyeball the lip to be horizontal with not using the alignment fixture so still being well with-in 1/2 degree, the Ok angle in a non specified angle tolerance..
    Last edited by michiganbuck; 06-08-2019 at 08:23 AM.

  5. Likes gerritv liked this post
  6. #4
    Join Date
    Jul 2005
    Location
    Cottage Grove, MN 55016
    Posts
    7,510
    Post Thanks / Like
    Likes (Given)
    4066
    Likes (Received)
    4490

    Default

    I found these . You need to be more patient too as many of us don't look daily on here.

    http://vintagemachinery.org/pubs/2804/4250.pdf

    http://vintagemachinery.org/pubs/2804/4249.pdf

    You may want to put and ad on Vintage Machinery and someone there might have info too.

  7. Likes gerritv, cash liked this post
  8. #5
    Join Date
    Mar 2016
    Country
    CANADA
    State/Province
    Ontario
    Posts
    120
    Post Thanks / Like
    Likes (Given)
    113
    Likes (Received)
    69

    Default

    Thank you michiganbuck, that helps. The manuals are useless, mainly advertising style.

    Richard, I am not the original poster but thought 4 days was fairly patient :-) The patent is actually more useful than the 'manuals', I even bought what was supposed to be a manual and it was just a bunch of hints. Not very helpful if you don't already know how to do this. US2958167A - Grinder fixture
    - Google Patents

  9. #6
    Join Date
    May 2018
    Country
    UNITED STATES
    State/Province
    Virginia
    Posts
    4
    Post Thanks / Like
    Likes (Given)
    0
    Likes (Received)
    1

    Default I think u are referring to a lip positioned that my be Hargis terms however if you

    Quote Originally Posted by lathehand View Post
    I have a Harig Steptool relief grinding fixture but not the alignment accessory used to time the workpiece to the cam. I found a picture of the accessory but I have been unable to figure out how it is used. Can anyone give me some tips on making and using an alignment fixture?
    However if that does not help & if we can get in touch on the phone I can walk you through this & possibly can get desired results I will monitor this forum For a few days & u can reply (fishman help) I will send you my phone # good luck

  10. #7
    Join Date
    Jun 2012
    Country
    UNITED STATES
    State/Province
    Michigan
    Posts
    9,789
    Post Thanks / Like
    Likes (Given)
    3312
    Likes (Received)
    3514

    Default

    alignment accessory

    Put your step tool on a plate. Height measure from the plate to the center line of a chucked cutter.
    Next make a 1/2 x 3/4 x 1 1/4" CRS block..(about).. To one side of the 3/4 x 1 1/2 face, ream a 3/8 hole.

    Make a 3/8 rod to the 1/16 shorter than length of the height measure. and drill and tap a 10/32 in one end.

    Drill/tap a set screw in the side of you block to hold the 3/8 rod vertical with the 10/32 pointing up.

    Make a locator 1/4 wide 1/8 thick x 1" long with a hole for a 10/32 screw at flat center.

    Grind one end of locator so taking off 1/16 so making your step-tool center line locator when it is mounted to the top end of the 3/8 rod.

    You eye ball the cutting edge of your cutter to the locator when your cam is in the fall away position for grinding clearance to a cutter. (just in side the fall away position is best.0

    Most often one will butter-fly (back and forth) all the cutting lips in a circle grind fashion.

    Then locate each tooth to the cam and grind, bring the cam relief up to just making the edge sharp.. doing same to each tooth edge insures all the lips are spot-on being the same.


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
  •