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Thread: 2018 belt grinder build - free plans available

  1. #16
    Join Date
    Dec 2009
    Location
    Mount Sterling, KY
    Posts
    2,498
    Have one in my shop I made from 2 tread mills. My goto for most any kind of stock removal type grinding, wood, metal, plastic whatever.

  2. #17
    The plans look great and the build of materials is very detailed. They call for using a 3 phase motor combined with a vfd for speed control. I have a single phase motor that spins at the typical 1725 rpm and was thinking about making one without the speed control just to use what I have and save significantly not having to buy the vfd. Anyone use one of these with the speed control? Any real issues?-- NORMAL --

  3. #18
    Join Date
    Oct 2013
    Location
    Germantown, WI
    Posts
    95
    You can certainly use a single phase motor WITHOUT a speed control. Those grinders I have pictured in this thread are single phase 1 HP grinders - 3450 RPM motors.

    If you want to use a single phase, C face motor that is 1725 RPM, then order an 8" drive wheel and it will work great as a single speed grinder.

    Note You cannot use a variable speed controller on a singe phase motor ( at least not for long.....it will burn up the motor).

  4. #19
    Join Date
    Dec 2009
    Location
    Mount Sterling, KY
    Posts
    2,498
    Here is something that may be of help to those building their own and wondering about motor RPM, belt speed etc. When I was researching my build, mostly on knife maker forums, I found that most users as well as belt suppliers recommended 3600 to 4000 feet per minute belt speed. I created this spreadsheet to help me see what my belt speed would be for a given size pulley plus added a variable that I could input drive pulley RPM. The end result was that if I made my drive pulley just under 4" diameter, an RPM reading is identical to feet per minute. If someone would like the actual Excel spreadsheet just PM me.


    This one has 1725 in as the variable.
    Image1.jpg

    This one has 3450 as the variable.
    Image2.jpg


    Hope this is helpful in your DIY build.
    PM or Post if you need further explanations for what this is showing.

    Edit: This allowed me to add an RPM meter to my drive pulley and label the readout as Ft/Min Belt Speed.
    Last edited by James Combs; 11-26-2018 at 6:46 PM.
    ____________________________________________
    JD at J&J WoodSmithing
    Owingsville, Kentucky

    "The best things in life are not things."

  5. #20
    Thanks for the tips. I didn't catch the part about the c-face until now. The motor I have has a standard face/resilient mount (a Baldor RL1307A) not the c-face so not ideal for these plans. Am going to try and find a c-face unless there's a reliable way to mount the one I have.

  6. #21
    Join Date
    Oct 2013
    Location
    Germantown, WI
    Posts
    95
    I would recommend finding a C face motor, it will make a much better unit. Use your RL1307A to make a 9" disc grinder....You can buy a high quality 5/8" arbor disc from TrueGrit or other knifemaker supply stores for about $85. A 9" disc will allow you to glue on standard full 9x11 sheets of sandpaper which makes it easy and cheap to change out paper.

  7. #22
    Great idea Brad! I'm going to do that. Do you just use a spray adhesive like super 77 to glue the sheets on? -- NORMAL --

  8. #23
    Join Date
    Oct 2013
    Location
    Germantown, WI
    Posts
    95
    Yes Dean,that is exactly what I use. You can also use 3M feathering adhesive and that works well too.

  9. #24
    Join Date
    Nov 2018
    Location
    Evansville, Indiana
    Posts
    1
    Brad,
    I PM'D you for a set of plans. Thanks, Bill.

  10. #25
    hi all,,,new here,,,is it possible to get the plans for this belt grinder
    Last edited by Keith Outten; 01-29-2019 at 8:49 AM. Reason: more info

  11. #26

    Thumbs up

    morning brad,grinder looks fantastic,,,is it possible you could send me the plans,,been looking for the right set for a long time, thanks for your time
    Last edited by Keith Outten; 01-29-2019 at 8:49 AM.

  12. #27
    Brad,

    Do you mind if I upload a public copy of your plans so they're accessible? You sent some to me in October so I can just put a link here so that anyone can just download in the future if they'd like. Let me know at your convenience.

  13. #28
    Join Date
    Oct 2013
    Location
    Germantown, WI
    Posts
    95
    Hi Dean. Yes that would be totally fine (and very helpful for me too). I am going to send you an updated version as I made a few notes within the plans for contact wheels abd other questions I received. I have been sending emails almost daily for a year now - a lot of interest and its great!!


    Dean could you send me an email or PM me your email address. I must have lost it in my sent box. Thanks.
    Last edited by brad jansen; 01-28-2019 at 9:13 PM.

  14. #29
    Brad Jansen's Ultimate Belt Grinder Plans 2019

    https://f001.backblazeb2.com/file/dc...inder+2019.pdf

    Thanks again Brad, great work!

  15. #30
    Join Date
    Oct 2013
    Location
    Germantown, WI
    Posts
    95
    Thanks for doing that Dean!!

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