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IndustryArena Forum > MetalWorking Machines > Benchtop Machines > Mini Lathe > Harbor Freight 7x10 tool post question
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  1. #1
    Join Date
    Apr 2011
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    0

    Harbor Freight 7x10 tool post question

    So, all of the references I find about this thing on the net says that the tool post is set up for 5/16" tooling. If I put 5/16" tooling in it, and make it touch the center post, the screws that hold it in place actually come down on the outside edge of the bit. Also, the centerline is about 1/16" too low.

    Is it possible that this tool post is designed for 3/8" tooling? How does one tell? The manual it came with doesn't say.

  2. #2
    Join Date
    Nov 2007
    Posts
    616
    I just looked at mine, I've got 3/8 tooling in it, and the cutting tip is near perfect on center. Of course, with some creative shimming you can use 1/4 or 5/16 just as well. All that matters is the tool bit is securely clamped in place, and the tip of the tool bit is as close to center as you can get.
    <a href="http://www.cnczone.com/forums/mini-lathe/82871-7-x-10-project-started.html" target="_blank">7X10 Lathe conversion</a>
    <a href="http://www.cnczone.com/forums/open-source-cnc-machine-designs/335846-cnc.html" target="_blank">Custom X-Carve router</a>
    <a href="http://www.linkedin.com/in/tooldesign" target="_blank">LinkedIn</a>

  3. #3
    Join Date
    Nov 2004
    Posts
    260
    The original Toolpost for these Machines is suppost to be used with shims under the Toolbit to make sure the cutting edge of the tool is even with the center line of the turned Part.
    The Toolbit dose not have to be all the way against the post, just make sure it is about centered under the tightening Screw.
    I am not aware where to buy a specific Set of shims for this, as a machinist we used to make our own from various thicknesses of sheet metal.
    But you could also buy and use a Feeler Gage Set of appropriet size for this.
    As for Toolsize, you can get anything that will fit into your post and has its cutting edge at or below center.
    Good Luck

  4. #4
    Join Date
    Apr 2011
    Posts
    0
    Looks like mine is 5/16". I just picked up the only 5/16" tooling they had at Harbor Freight. I tested one by facing some stock, and it's perfectly centered.

    Unfortunately, they don't carry blanks, only carbide. Where can I find 5/16" blanks? The only place I found any was Ebay.

  5. #5
    Quote Originally Posted by signal15 View Post
    Looks like mine is 5/16". I just picked up the only 5/16" tooling they had at Harbor Freight. I tested one by facing some stock, and it's perfectly centered.

    Unfortunately, they don't carry blanks, only carbide. Where can I find 5/16" blanks? The only place I found any was Ebay.

    G1508 HSS Square Tool Bits - 5/16" x 2-1/2" L
    Hoss
    http://www.hossmachine.info - Gosh, you've... really got some nice toys here. - Roy Batty -- http://www.g0704.com - http://www.bf20.com - http://www.g0602.com

  6. #6
    Join Date
    Oct 2005
    Posts
    328
    I'm not sure how good HF tool bits are, even in HSS. Here is Enco's offering...

    Enco &#45; Guaranteed Lowest Prices on Machinery, Measuring Tools, Cutting Tools and Shop Supplies

    Dave

  7. #7
    Join Date
    Nov 2007
    Posts
    616
    There's also HSS inserts available for insert tooling, if you want HSS and don't care to grind your own.
    <a href="http://www.cnczone.com/forums/mini-lathe/82871-7-x-10-project-started.html" target="_blank">7X10 Lathe conversion</a>
    <a href="http://www.cnczone.com/forums/open-source-cnc-machine-designs/335846-cnc.html" target="_blank">Custom X-Carve router</a>
    <a href="http://www.linkedin.com/in/tooldesign" target="_blank">LinkedIn</a>

  8. #8
    Join Date
    May 2007
    Posts
    1026
    I have the Tormach tool post and the AR Warner insert tools and am very happy with both. I use both HSS and carbide inserts depending on the job.

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