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Thread: Spade drill holder

  1. #21
    Join Date
    Jan 2002
    Location
    Huntsville Ala
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    5,856

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    What's the purpose of the notches in the one seen in post #16? Is that just equivalent to a roughing end mill? I assume they're offset from one flank to the other.

  2. #22
    Join Date
    May 2015
    Posts
    386

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    I guess itís for chips. FYI Iíve started on the first tool today. The photo is my progress so far.


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  3. #23
    Join Date
    Jan 2010
    Location
    Kansas City area
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    5,687

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    The notches are chip breakers. They keep the chips in little pieces instead of one long string. Cutting little chips takes less HP than one big wide chip.

  4. #24
    Join Date
    May 2015
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    386

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    Well I finished the first drill holder and tested it. This spade was the largest one 1 3/64. My plan is to make holders for the all the spade drills that I was gifted. It was an adventure but it will make video content. Here is the finished tool after I cold blued it.


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  5. #25
    Join Date
    Jul 2006
    Location
    Dracut, Massachusetts
    Posts
    1,996

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    Wow, you're quick! I would have to spent at least 14 months agonizing over the detials of whatever design I thought up, and then who knows how many months before I actaully got around to trying to make one.

    Do you need more than one holder? I figured that part of the idea behind these is that one holder can drill various sized holes depending on which insert you put in it. Do you have inserts that require different sized holders?

    Anyhow, Nicely done!

  6. #26
    Join Date
    Nov 2006
    Location
    durban s africa
    Posts
    1,453

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    Do these holders have a coolant through hole. Nice work.

  7. #27
    Join Date
    Apr 2017
    Location
    Kelowna BC
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    2,523

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    Quote Originally Posted by alanganes View Post
    Wow, you're quick! I would have to spent at least 14 months agonizing over the detials of whatever design I thought up, and then who knows how many months before I actaully got around to trying to make one.

    Do you need more than one holder? I figured that part of the idea behind these is that one holder can drill various sized holes depending on which insert you put in it. Do you have inserts that require different sized holders?

    Anyhow, Nicely done!
    Plus one on that..

  8. #28
    Join Date
    Oct 2012
    Location
    San Antonio TX, USA
    Posts
    2,720

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    nice work! Looking forward to how you find them.

    Only suggestion would be to increase the size of the relief/ chip excavation channel. As the body of the drill is about the same size as the tip, you may struggle to clear chips out of deeper holes with the small channel you have. Just going by the commercial ones I've seen.

  9. #29
    Join Date
    May 2015
    Posts
    386

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    Quote Originally Posted by alanganes View Post
    Wow, you're quick! I would have to spent at least 14 months agonizing over the detials of whatever design I thought up, and then who knows how many months before I actaully got around to trying to make one.

    Do you need more than one holder? I figured that part of the idea behind these is that one holder can drill various sized holes depending on which insert you put in it. Do you have inserts that require different sized holders?

    Anyhow, Nicely done!
    Actually Iím planning on making individual holders, the blades are a bit different. Beggars canít be choosers


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  10. #30
    Join Date
    May 2015
    Posts
    386

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    Quote Originally Posted by plunger View Post
    Do these holders have a coolant through hole. Nice work.
    No they donít. I made them up to fit my tailstock so I didnít add coolant holes since my lathe doesnít have coolant. I use a mister for coolant as needed


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