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IndustryArena Forum > WoodWorking Machines > DIY CNC Router Table Machines > What are you using for a spoil board cutter on your cnc router?
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  1. #1
    Join Date
    Oct 2006
    Posts
    205

    What are you using for a spoil board cutter on your cnc router?

    I bought some great bits at http://www.centuriontools.com for my cnc router. They also sell a 3" spoil board cutter that is used to level the replaceable spoil board. Unfortunetly, this spoil board cutter is not affordable for me at the moment.

    My table is 28x40 and would take some time to level it with the largest 1/2" bits I have.

    I was wondering what other zoners are using to quickly level their spoil boards.

    Thanks in advance.

    Rod
    San Francisco

  2. #2
    Join Date
    Aug 2007
    Posts
    339
    I use the Fly cutter that is made for this purpose. I have 2 different ones A 3 in. and a 4 in. for doing the entire table my table is 5 ft X 13 ft . It would take for ever using a smaller dia tool
    We all live in Tents! Some live in content others live in discontent.

  3. #3
    Join Date
    Oct 2006
    Posts
    205
    Boots,
    I take it that it's a 1/2 shank cutter in your router for those fly cutters. What speed are you running when leveling?

    Rod

  4. #4
    Join Date
    Aug 2007
    Posts
    339
    Yes it is a half in shank...I run it at 12,000 RPM and 480 IPM feed rate. I draw a box slightly larger than my surface to mill and use the pocketing feature in the software and pocket mill the surface .010 deep. If you need to go deeper make another pass.
    We all live in Tents! Some live in content others live in discontent.

  5. #5
    Join Date
    Oct 2006
    Posts
    205
    Boots,
    That's great intel. Thank you.

    Thanks for chiming in. I wonder what other guys are also doing.

    Rod

  6. #6
    Join Date
    Jul 2009
    Posts
    140
    I found a 3/4" cut width, double straight flute router bit at a hardware store, and this bit actually has cutting edge on the bottom face as well. Makes fast work of my MDF spoilboard!

  7. #7
    Join Date
    Oct 2006
    Posts
    205
    Carbon Kevin,
    I take it that it's a 1/2" reduced shank bit with a 3/4 cutter. I will have to be on the lookout for one of these.

    Rod

  8. #8
    Join Date
    Jul 2009
    Posts
    140
    Quote Originally Posted by rodjava View Post
    Carbon Kevin,
    I take it that it's a 1/2" reduced shank bit with a 3/4 cutter. I will have to be on the lookout for one of these.

    Rod
    1/4" shank, 3/4" cutter. It's a wood router bit, basically. I can find the brand name if you're interested.

  9. #9
    Join Date
    Oct 2006
    Posts
    205
    CarbonKevin,
    thanks for the offer to check. I'm leaning towards larger cutters like 1/2" shank with 2" cutter.

    I see them sold here: http://www.routerbits.com/cgi-router...01065_10500+12 This is $200 cheaper than from centurion tools.

    I would only use them for shallow, leveling passing cuts.

    Rod

  10. #10
    Join Date
    Oct 2006
    Posts
    205
    I just bought this 1/2" shank drawer lock joint router bit on Ebay for $20 including shipping.

    http://cgi.ebay.com/1-pc-1-2-SH-New-...item1e5c365786

    It's a drawer locking bit which I think can be used as a surfacing/planning bit to level a spoil board.

    I have priced the same bit on different websites at $40-$65 for the same C2 carbide.

    I will report my findings after I get it and tried it out.

    Here are pics of the two different cutters that cost $225 and $20.

    I would like to hear you thoughts about my choice.

    Rod
    Attached Thumbnails Attached Thumbnails spoilboard2.jpg   1pc-drawer-6.jpg  

  11. #11
    Join Date
    Mar 2003
    Posts
    35538
    Gerry

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    JointCAM - CNC Dovetails & Box Joints
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    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)

  12. #12
    Join Date
    Oct 2006
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    205
    Gerry,
    Those are some great options and at all price ranges.

    I'm a bit frugal and look for alternative means to save money by using muliti-purpose tooling like this drawer lock bit instead of a dedicated spoil board cutter.

    Thanks for chiming in.

    Rod

  13. #13
    Join Date
    Jul 2008
    Posts
    267
    Here is what I use. 1 1/2" diameter. $17. 10k RPM

    http://grizzly.com/products/Bottom-C...1-2-Dia-/C1261
    Attached Thumbnails Attached Thumbnails Bottom Cleaning Bit.jpg  

  14. #14
    Join Date
    Oct 2009
    Posts
    147
    just stick a 1/2" endmill in and go to town, i'll bet it doesn't take as long as you think.

  15. #15
    Join Date
    Jul 2009
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    140
    Quote Originally Posted by rodjava View Post
    CarbonKevin,
    thanks for the offer to check. I'm leaning towards larger cutters like 1/2" shank with 2" cutter.
    Rod
    The brand name is Samona

    ck

  16. #16
    Join Date
    Aug 2008
    Posts
    1166
    I use a 1/2" cutter to surface my 49"x49" spoilboard. I'm going at ~150ipm and it usually takes about 20-30 minutes (haven't done it in a while). I'm not running production, so I just go do something else while it runs.

  17. #17
    Join Date
    Jun 2008
    Posts
    203
    Quote Originally Posted by analogman View Post
    Here is what I use. 1 1/2" diameter. $17. 10k RPM

    http://grizzly.com/products/Bottom-C...1-2-Dia-/C1261
    This is exactly what I use...

    Also called a hinge mortising router bit. I bought mine @ Rockler

  18. #18
    Join Date
    Aug 2005
    Posts
    437
    Glad I found this thread, good info.

    And I was just going to modify a 3/4" spade bit, grindoff the center point and points on the outer edge... may still give this a try.
    Deeds not words...
    VoltsAndBolts runs RC for the builder. http://www.voltsandboltsonline.com/ My Forum

  19. #19
    Join Date
    Jul 2009
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    140
    Quote Originally Posted by voltsandbolts View Post
    Glad I found this thread, good info.

    And I was just going to modify a 3/4" spade bit, grindoff the center point and points on the outer edge... may still give this a try.
    YIKES!

    I really don't know if that's the best way to go...spade bits are meant for low speeds, not 15,000 RPM and up. Also, the geometry of the cutting surface is completely different than what you'd see on a more appropriate cutter.

    I'm all for saving a bit of money, and this might be an alright way of repurposing a tool - but for $20, in this situation I'd buy the right router bit instead. Spade bit just seems a bit risky to me...but I can't put my finger on why.

  20. #20
    Join Date
    Mar 2003
    Posts
    35538
    Putting a spade bit in a router is the worst possible thing you could do with a spade bit.
    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

    JointCAM - CNC Dovetails & Box Joints
    http://www.g-forcecnc.com/jointcam.html

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)

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