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Thread: Chainsaw RPM's

  1. #1
    TreeHouser Nutball's Avatar
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    Default Chainsaw RPM's

    I've always wondered at what rpm chainsaws cut. I always assumed around 6000-8000rpm, not a bad guess. I watched some old videos I have of my saws cutting, and listened to them while trying to match the frequency with a saw tooth tone generator on my phone. Just for fun, here's what I found:

    Echo 271t: Max power ~10,600, Optimal cut speed in 4-8" wood 9250, max torque (before loss of power and stalling) 8100-8300.

    Chinese husqvarna 365's
    newer, stronger, with new aggressive chain: Optimal cut speed 7000, max torque 6250. (This saw may have still been tuned too rich, I know one I had was)
    older, weaker design with old chain: Max power 9250, optimal cut speed 8500, max torque 6800.

    Husqvarna 390 with 20" bar, 19" cut depth in 10" and 25" logs: Max power 9750-10,650, optimal cut speed 8500-9500, max torque 7800-8300.

    All saws tested in solid hickory or oak.

  2. #2
    TreeHouser Sponsor cory's Avatar
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    Interesting.

    Keeping good/optimal rpms is something I think about on most every cut.
    Mastery is an illusion, grace a momentary gift, apprenticeship endless.

  3. #3
    TreeHouser Nutball's Avatar
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    Me too. I try to challenge myself with holding perfectly steady at the optimal rpms, no frequent repositioning 5 times a second.

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    More biners!!! Sponsor pantheraba's Avatar
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    Interesting thread idea...be cool to see where it goes.
    Gary

  5. #5
    Call me Bob BlackSmith's Avatar
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    A little off topic but a little on. I found an app called engine rpm at the app store if y’all are interested. Be good for tuning.
    ˙ǝuılƃıs ʎɯ uı ʇnd oʇ ɹǝʌǝlɔ ƃuıɥʇʎuɐ ɟo ʞuıɥʇ ʇ,uɐɔ I

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    Treehouser Sponsor Tree09's Avatar
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    How does it work Bob?
    Kyle


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    TreeHouser Sponsor Raj's Avatar
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    Well you pay your $3.99.......

    Peter

  8. #8
    Call me Bob BlackSmith's Avatar
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    Sound I’m guessing Kyle. Around $9 I think Pete.
    ˙ǝuılƃıs ʎɯ uı ʇnd oʇ ɹǝʌǝlɔ ƃuıɥʇʎuɐ ɟo ʞuıɥʇ ʇ,uɐɔ I

  9. #9
    TreeHouser Nutball's Avatar
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    It counts the number of pops the engine sounds in a second I assume. My saws were cutting at around 100-180Hz.

  10. #10
    TreeHouser Magnus's Avatar
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    I used one of these apps in a chainsaw test. We then tested same saw in three phones and got very different results as microphones have different soundfrequence the take up just like ears. Mine less than most...

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