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Thread: feeds and speeds - 1.25" hard maple lamination

  1. #1
    Join Date
    Jan 2016
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    Fargo, ND
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    Default feeds and speeds - 1.25" hard maple lamination

    hi guys,

    i'm trying to experiment with cutting some rattle profiles (.75" hard maple with two 1/8" layers glued on top - total thickness roughly 1.25")

    i overlooked some important details on the first run, feeds and speeds were waaay off, pass depth was too deep, and i snapped my .25" downcut bit right off.

    i'm new to this and would eventually like to use double sided machining to dish out the skinny mid section, but for now, just trying to dial in feeds and speeds for the profile cut.

    attaching pics of my results, up until the bit broke, as well as a finished rattle. don't have an indexer, which i'd imagine would make turning a rounder rattle like this easier, but have been playing with roundover bits to achieve something similar for the time being.

    if anyone has recommendations on proper feeds and speeds for cutting 1.25" maple, i'm waiting on another .25" downcut and hope to cut again soon, this time with a little more success

    the rattles are roughly 6" long, and about 1.75" wide at the widest point.

    thanks,
    chadbone rattle profile.jpgfinished rattle.jpgrattle profile.jpg

  2. #2
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    Jan 2016
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    Fargo, ND
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    Default

    also, if there would be a more suitable bit than the downcut, please share your thoughts. thanks!

  3. #3
    Join Date
    Mar 2004
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    Delray Beach, FL
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    Default

    What model bot and router/spindle do you have.
    Answer is dependent on that.

  4. #4
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    Default

    yes, that might help
    desktop max with a spindle

  5. #5
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    I would keep my feed around 1.5-2 ips and step down no more than 1/4-3/8"
    Spin around 12-14k(adjust according to your ears.)
    Could likely be a bit more aggressive but why push it?

  6. #6
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    Thanks so much Dave,

    I will try your recommendations once I get the new bits and will let you know how it goes. I'm in no hurry to push things, and agree, like Scott mentioned, would much prefer taking a little more time on the table if it saves me the hassle of so much sanding later.

    Thanks again for your help. I really appreciate you taking the time.

    chad

  7. #7
    Join Date
    Mar 2004
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    Delray Beach, FL
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    You're welcome.
    I bet the forum would also appreciate your observations on the Max as you become more familiar with it.
    As a new model there hasn't been a lot of feedback here yet.
    Been thinking about one myself as well.

  8. #8
    Join Date
    Dec 2008
    Location
    Diamond Lake, WA
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    I just cut legs for 10 barstools (20 blanks) from 1.25" rustic hickory. Used a 3/8" two flute upcut spiral. 12K rpm, 4IPM. First passes were climb cuts leaving a 1/32" skin. Next cut thru in one pass using 1" x .5" tabs to hold the legs in place. No bit problems, no screaming bits, good clean cuts.
    Don
    Diamond Lake Custom Woodworks, LLC
    www.dlwoodworks.com
    ***********************************
    Life is not a journey to the grave with the intention of arriving safely in one pretty and well preserved piece; But to skid in broadside, thoroughly used up, worn out, bank accounts empty, credit cards maxed out, defiantly shouting "Geronimo"!

    If you make something idiot proof, all they do is create a better idiot.

  9. #9
    Join Date
    Jan 2011
    Location
    gleason, wi 54435
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    I am with dlcw on bit selection. I seldom use down cut bits on hardwood. They tend to burn maple and cherry for me so I leave them for manufactured wood.

  10. #10
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    Bob and Don, thanks for your help. I'll add one of those to the order and let you know how it goes. I know it's a relatively simple question for you experienced guys, but it really is a huge help and means a lot for you all to take the time and give your feedback. Thank you! chad

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