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Thread: Putting an edge on the belt grinder

  1. #1
    Join Date
    Feb 2009
    Location
    So Cal
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    Putting an edge on the belt grinder


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    Hi Guys,

    I have been putting an edge on my blades on the belt grinder. I have seen some makers have dedicated grinders with the motor reversed just for sharpening.

    What do you think?

    I was thinking of putting a drumswitch on my grinder to reverse the motor for sharpening.

  2. #2
    Why reverse it?

  3. #3
    Join Date
    Feb 2009
    Location
    So Cal
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    2,064
    I think the belt moving away from the edge might be easier on the belt instead of turning into the edge. Hopefully I can get some feedback

  4. #4
    Ahh, so you want the edge up...

    I just sharpen with the edge down, and mine IS reversible...

  5. #5
    Join Date
    May 2004
    Location
    Southeast Ohio
    Posts
    5,581
    So little pressure is used when sharpening on a moving belt there is little affect to the belt's surface.
    Fred

  6. #6
    Join Date
    Sep 2000
    Location
    Kamloops B.C. Canada
    Posts
    3,256
    I sharpen with the edge towards me the belt turning towards me, in the slack part of the belt. Frank

  7. #7
    Join Date
    Aug 2004
    Location
    Norfolk,Va.
    Posts
    19,367
    Some folks feel they have a better idea of the blade angle when observing it from the spine, so they hold the blade edge away from you and run the belt the same way. This does allow the blade to be more evenly ground from both sides, as well as tosses the blade away from you if an OOPSIE happens. If they set up a dedicated grinder for this, the belt is often run at a very slow speed, and they use a different gearing ratio in the pulleys and wheels to allow more torque and much slower speed than a blade grinder would run at.

    That probably doesn't make it worth having a dedicated grinder for most shops....but who doesn't want more equipment.

    I have one I built that runs 2.5X48" belts on a VS 3/4HP motor that has a max output speed of 75RPM. It will run from crawl to about 100FPS without any possible stalling. It has jigs to sharpen the blades at any angle desired. While a really cool tool ( no pun), it is hardly ever used.....maybe in the new shop it will get a permanent spot and get used more.
    Stacy E.Apelt
    It is better to die fighting evil than to live under it.

  8. #8
    Join Date
    Nov 1999
    Location
    Right behind the drinking fountain
    Posts
    14,938
    I use my 1 x 42 belt sander for sharpening. Edge down.


    At one point, my life was meaningless. Hobos spit on me and little children would run up and punch me in the groin.

  9. #9
    Join Date
    Dec 2009
    Location
    West of the Susquehanna.
    Posts
    13,769
    I like the edge away from me. Instead of switching wires, I just turn the grinder around. I've found paper wheels work better that way too on a Baldor buffer.
    ​​​ZT0350CF FOR SALE.

  10. #10
    Join Date
    Mar 2006
    Location
    Northwester Ontario Canada
    Posts
    5,640
    I use a variable speed Wilton and sharpen by slowing the machine right down and using a fresh belt dedicated for sharpening. Once the belt begins to lose its performance i toss it in the mix for general work and use another fresh belt for sharpening. This is the primary sharpening step, then I fine tune the edges by doing the final sharpening by hand.

  11. #11
    Join Date
    Jan 2008
    Location
    Cape Breton, Nova Scotia
    Posts
    1,587
    I use my old 1x30. I also like the edge away from me. I built a support so it can be turned on its back. Works like a charm!


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