Page 7 of 40 FirstFirst ... 5678917 ... LastLast
Results 61 to 70 of 396

Thread: Pistol Grip Wrist Saving Arborist Tool

  1. #61

  2. #62
    Treehouser Sponsor SeanKroll's Avatar
    Join Date
    Oct 2016
    Posts
    1,801

    Default

    K.I.S.S.

    I like the idea of this handle grip-orientation https://www.amazon.com/Husqvarna-574.../dp/B0037W8YEM

    Seems more ergonomic.


    Add a piece of rope and a good clamp, with a quick release.
    Make it easy to replace the rope.

  3. #63
    TreeHouser
    Join Date
    Apr 2011
    Location
    France
    Posts
    1,023

    Default

    I only grasp the limbs with 2" diameter max, except with dead wood which can be a little bigger. That's about what I can hold with the thumb touching the trigger finger, giving me the best grip. I found that's a good size for most trees to match the max load I can handle. Cupressus arizonica for example has a lower limit due to it's density and its heavy clusters of fruits.

    The way I understand the gizmo is to avoid the twisting motion on the wrist when the limb fall from upright position. The hand has to take the load however, but the rope follow all the angle's changes without complaining, so the wrist isn't forced sideway.

    Usually, when you grasp full hand a limb in front of you or above, the wrist is almost in line with the arm, the thumb oriented to the butt side and the pinky to the tip, so the limb is perpendicular to your arm / wrist, like any tool's handle. After the cut, the limb falls tip first, pulling down your hand.
    With a light limb, no worry, you can keep the hand in front of you, the fore-arm just rotates to accommodate the new position, the limb staying perpendicular to your arm, like you hold a candle and the wrist is fine.
    With a heavier limb, the arm can't hold it like that and is forced to unfold, becoming vertical, in line with the limb. Problem, the hand has to hold it perpendicular to keep this heavy weight (best grip). The poor wrist is in between and unable to match this angle, locked and over stressed. Because of that, the hand can't fully follow the limb. Finally, the limb try to open your hand by prying out the pinky and the ring finger, so only three fingers are able to maintain the grip. With a heavy limb, it's painful and close to a oopsy.

    If you hold the limb with the thumb to the tip and the pinky to the butt, like it would be ok after the cut with the limb dandling under you, the hand is palm up and the fore-arm can't rotate any more to follow the fall. The wrist and the shoulder take the beating (hard).

    I've tried to find a better hand position / movement for the heavy woods, but no way.
    I use a lot the self rigging technique with a bunch of slings which I always carry on my saddle. That's handy, from 2" to about 6-8" diameter, but it's time consuming, regardless of the diameter.

    The cut release on the handle would avoid half of that time. If the setting around the limb can be quickly made, the Jomo's gizmo could be interesting.

    But Sean seems right too, the perpendicular handle has better holding capabilities.

  4. #64
    TreeHouser
    Join Date
    Apr 2011
    Location
    France
    Posts
    1,023

    Default

    Actually, there's one move relatively friendly for the wrist/arm. It's for the limbs on the opposite side of the trunk or above you, by letting them go forward away from you, not to the side. The hand keeps its grip in line with the limb and your arm, like with an axe splitting fire logs.
    But there's a problem, the forearm is just in the path of the chainsaw or the handsaw. That could be a concern...

  5. #65
    Acolyte of the short bar Sponsor Bermy's Avatar
    Join Date
    May 2008
    Location
    Bermuda and Tasmania
    Age
    51
    Posts
    4,538

    Default

    I'm with Mick and Stig....up till about two posts ago thanks to Marc-A. Took a Euro to explain it.

    Girth hitched loop runners...catch dem sukkas, then drop them, no wrists needed.
    Keep smiling, they will wonder what you're up to...

    Originally Posted by woodworkingboy
    It's always better when people get the feeling that they will regret their decision, before they have to regret their decision.

  6. #66
    TreeHouser Mick!'s Avatar
    Join Date
    Nov 2013
    Location
    South West France
    Age
    53
    Posts
    6,483

    Default

    Still don't get it, but I use the tail of my climbing line.
    From the supreme commander of Project Earth transition.



    Mick

  7. #67
    TreeHouser Jomo's Avatar
    Join Date
    Jan 2014
    Location
    San Diego
    Age
    58
    Posts
    31,946

    Default

    Never fear Mick!

    I cornered my retired older brother last night, a journeymen machinist n hardcore gun enthusiast.

    I set the hook deep!

    Told him he could sell em for 4 bills a pop!

    You Clantons better clear out!

    All the other kids with their pumped up kicks...

    Jomo

  8. #68
    TreeHouser Sponsor Raj's Avatar
    Join Date
    Oct 2013
    Location
    Brantford, Ontario
    Age
    45
    Posts
    4,882

    Default

    Better run faster than mah bullets!
    Peter

  9. #69
    Captain Zero! Sponsor FireFighterZero's Avatar
    Join Date
    Dec 2013
    Location
    North Central Montana, bloody cold!
    Age
    34
    Posts
    14,043

    Default

    Is this not a reasonable place to park?

    The bureaucracy is expanding to meet the needs of the expanding bureaucracy.

    Jim Conrad

  10. #70
    TreeHouser Sponsor flushcut's Avatar
    Join Date
    Jan 2011
    Location
    Delavan, WI
    Age
    39
    Posts
    8,900

    Default

    ^lol

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •