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Thread: Anyone have any thoughts on the OBM grinder?

  1. #1
    Captain ARAD. Voidmonster's Avatar
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    Default Anyone have any thoughts on the OBM grinder?

    I'm gonna be pushing the buy button on one of these grinders later this week (hooray for car rebate!). I'm adding a 4" contact wheel and some other parts and I'll be driving it with a 2.5hp DC motor with variable speed.

    A lot of my 'making razors' plans got badly stalled out by the shared-space shop I was using going under (AGAIN).

    I'm on generally better footing this time, and I've got a 3d printer that I can use to make scale molds (probably with lost wax and aluminum or something, or maybe directly from printed ceramic resin -- we'll see if that stuff works).

    But first up, GRINDER!
    spazola, Geezer, BobH and 5 others like this.
    -Zak Jarvis. Writer. Artist. Bon vivant.

  2. #2
    Senior Member jfk742's Avatar
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    I bought his super budget bolt together jobby. It tracks well enough but I did put a 40lb gas spring to replace the 20lb it came with. If I were to do it again I would have bought that yellow one on his website and figured out a way to weld on a 56c patterned mounting bracket for my motor.

    This is the one I bought, eBay only but same manufacturer:
    Name:  043BE5B4-1886-4801-95E7-20F399CBBD55.jpg
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    I have an extra 40lb spring if you need it, you’ll just need to cannibalize the mounting the mounting hardware.

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    Voidmonster (01-14-2020)

  4. #3
    Captain ARAD. Voidmonster's Avatar
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    Quote Originally Posted by jfk742 View Post
    I bought his super budget bolt together jobby. It tracks well enough but I did put a 40lb gas spring to replace the 20lb it came with. If I were to do it again I would have bought that yellow one on his website and figured out a way to weld on a 56c patterned mounting bracket for my motor.

    This is the one I bought, eBay only but same manufacturer:
    Name:  043BE5B4-1886-4801-95E7-20F399CBBD55.jpg
Views: 74
Size:  9.0 KB

    I have an extra 40lb spring if you need it, you’ll just need to cannibalize the mounting the mounting hardware.
    I’m still planning to make a housing for the motor since it’s air cooled and completely open. Then I plan to just mount it to whatever I use for a table (still looking around for that).

    If I need the beefier spring, I’ll hit you up!

    Also, if you need anything 3D printed... my resin printer can do pretty detailed stuff! With the resin I’m using, it’s not as tough as the usual filament printers, but it’s got 50 micron accuracy. So when you think 3D printed, think this:

    Name:  BAA9A336-B429-4119-90A6-1F2890C9D793.jpg
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    jfk742 (01-14-2020)

  6. #4
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    Not a bad looking set up. Went to variable speed several years ago and wonder what took me so long. One thing I really like about it is the 1 1/2" tooling arms make it easy to interchange with my KMG. One thing I don't like is the yellow one has plastic idler wheels, go for the aluminum.

    I love my KMG, and have a lot invested in tooling and such, but if it'd been available at the time, and knowing what I know now, I'd have went with something like the KMG TX. At the very least a grinder capable of tilting 90 deg. would have eliminated my horizontal edge grinder.
    Voidmonster and rolodave like this.

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    Voidmonster (01-15-2020)

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