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Humor me on this theoretical mod to a Husky 240 chainsaw

Discussion in 'Chainsaws and Power Equipment' started by saskwoodburner, Feb 28, 2016.

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  1. Barcroftb

    Barcroftb

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    Short answer, probably not. What Jon said is spot on. Narrow kerf might allow higher chain speed in the cut, but the saw still needs to provide the torque, and there's only so much there. Short of a port job there really is no replacement for displacement.
     
    Barcroftb, Feb 29, 2016
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  2. saskwoodburner

    saskwoodburner

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    It sounds like the bottom line is a no go on this exercise. 3-4% cutting speed could be lost or gained just on chain sharpness alone I'm sure. Guess I won't pursue this idea, but it was fun hashing it out on the forum.

    The wood in question is white poplar btw. Technically a hardwood but burns like a softwood?
     
    saskwoodburner, Feb 29, 2016
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  3. saskwoodburner

    saskwoodburner

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    To keep with the theme of the thread, could this saw be ported...?
     
    saskwoodburner, Feb 29, 2016
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  4. Barcroftb

    Barcroftb

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    Theoretically it could have some work done. But being a clamshell and not a split case saw there isn't a lot that can be done with it. On top of that is the cost. I doesn't generally make sense to spend twice the cost of the saw on port work.
     
    Barcroftb, Feb 29, 2016
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  5. MasterMech

    MasterMech The Mechanical Moderator

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    Sure it could. You just would have to live without the bump in compression that most builders are including in a port job. Sprocket changes in some small saws can be limiting, as not every option is out there. That's where Stihl's mini-spline drums are nice because almost any of their small saws can accept a rim sprocket for whatever pitch and gearing you desire.

    On the 240, I would buy a loop of Stihl PS or PS3 chain if you want to boost its cut speed. Not even 91VXL cuts as fast as PS series chain. Stay with the 6 pin spur drum and your current bar. Going to a super short bar won't speed up the saw significantly so unless it's a handling issue for you, I'd save the $$.
    We're still around. Most of us are working stiffs. I just wrapped up a 30hr weekend and my total from last week is likely flirting with 90hrs.
     
    MasterMech, Feb 29, 2016
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  6. saskwoodburner

    saskwoodburner

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    I watched a few videos on youtube where they had the PS3 chain, and it seems to pull itself along pretty good compared to regular chain.
     
    saskwoodburner, Feb 29, 2016
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  7. concretegrazer

    concretegrazer

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    Slacker.
     
    concretegrazer, Feb 29, 2016
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  8. MasterMech

    MasterMech The Mechanical Moderator

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    Fast and smooth, keep it outta the dirt and you will like it. A lot.

     
    MasterMech, Feb 29, 2016
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  9. HDRock

    HDRock

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    Most of my chains are Oregon but I have one stihl chain, RM3 and it just stays sharp a really long time.
    So, does stihl have a regular 3/8 pitch Simi chisel that is not a low kick back chain?
    I looked but didn't see one like that
     
    HDRock, Feb 29, 2016
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  10. concretegrazer

    concretegrazer

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    Yes, RM. What gauge? Or are we talking lp?
     
    concretegrazer, Feb 29, 2016
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  11. MasterMech

    MasterMech The Mechanical Moderator

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    Yes, it's called RM and is very similar to the RM3 you have. Unless the nose of the bar is buried, you probably won't notice much if any difference.
     
    MasterMech, Feb 29, 2016
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  12. HDRock

    HDRock

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    I want a, 3/8 . O50, 16" 60 dl Simi chisel preferably not low kick back. For my 55
    As far as I could find Oregon doesn't have a 3/8 . O50, 16" 60 dl Simi chisel
     
    HDRock, Feb 29, 2016
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  13. HDRock

    HDRock

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    Why is the RM called micro,
    OILOMATIC® STIHL RAPID™ Micro™ (RM)
     
    HDRock, Feb 29, 2016
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  14. concretegrazer

    concretegrazer

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    33RM is what your after.
     
    concretegrazer, Feb 29, 2016
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  15. concretegrazer

    concretegrazer

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    Stihls fancy marketing.
     
    concretegrazer, Feb 29, 2016
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  16. MasterMech

    MasterMech The Mechanical Moderator

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    Mostly.

    Micro refers to the specific shape of the cutter. Micro chisel. Some variants of semi-chisel chain vary in cutter shape slightly.
     
    MasterMech, Feb 29, 2016
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  17. HDRock

    HDRock

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    seems like they dropped the 33 designation is that right or wrong?
     
    HDRock, Feb 29, 2016
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  18. concretegrazer

    concretegrazer

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    The first 3 stands for 3/8ths and the second 3 means .050 gauge.

    I run 36rm aka 3/8 .063.
     
    concretegrazer, Feb 29, 2016
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  19. concretegrazer

    concretegrazer

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    concretegrazer, Feb 29, 2016
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  20. HDRock

    HDRock

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    HDRock, Feb 29, 2016
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