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Thread: Is It Possible to Slow Down a Grinder's Speed?

  1. #46
    Quote Originally Posted by David Keller NC View Post
    Yeah, my bad - that was a poor example. But you can get VFDs that are 3ph in, 3 ph out, 1 ph in, 3 ph out, and 1 ph in, 1 ph out. Here's a better example:

    http://www.anaconsystems.com/text/opti_e2.html
    Thanks for the pointer to those VFDs. They are expensive, though. For many tools, the VFD could cost more than the tool.

    Mike
    Go into the world and do well. But more importantly, go into the world and do good.

  2. #47
    Join Date
    Sep 2008
    Location
    Raleigh, NC
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    2,850
    Quote Originally Posted by Mike Henderson View Post
    Thanks for the pointer to those VFDs. They are expensive, though. For many tools, the VFD could cost more than the tool.

    Mike
    Yeah, the solutions offered to the OP of this thread are a lot more practical than a single-phase VFD. But they might be useful to those interested in building their own powered lathe. With one of these, the mechanical alignment issues with multiple pulley diameters and wooden pillow blocks aren't an issue.

  3. #48
    Join Date
    Feb 2003
    Location
    Doylestown, PA
    Posts
    4,107
    Quote Originally Posted by David Keller NC View Post
    Yeah, my bad - that was a poor example. But you can get VFDs that are 3ph in, 3 ph out, 1 ph in, 3 ph out, and 1 ph in, 1 ph out. Here's a better example:

    http://www.anaconsystems.com/text/opti_e2.html
    And my woodworking related bookmarks got one longer. Thanks!

  4. #49
    I find that all a slow speed grinder does it make take longer to burn your tool. Grinding takes practice, dress you wheels so they are sharp.

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