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'Bore cut' versus 'Plunge cut'?

Discussion in 'Chainsaw' started by Philbert, Jun 12, 2018.

  1. Philbert

    Philbert Chainsaw Enthusiast

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    I have used these terms interchangeably. Recently ran into some people who make a distinction between the two.

    Any thoughts?

    Philbert
     
  2. buzz sawyer

    buzz sawyer Addicted to ArboristSite

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    I'm no expert, but I consider a borecut to be all the way through the tree while a plunge cut may only go part way into the tree. Both are plunge cuts but not borecuts - imo.
     
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  3. RandyMac

    RandyMac Stiff Member

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    Plunge cuts are used for bucking in the bind, bore cuts are part of the swedish stump dance.
     
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  4. Huskybill

    Huskybill ArboristSite Operative

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    Both cuts are used together when using a tree jack.
     
  5. Philbert

    Philbert Chainsaw Enthusiast

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    Can you elaborate? Which are 'bore cuts' and which are 'plunge cuts'?

    (I don't know jack!)

    Thanks.

    Philbert
     
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  6. pioneerguy600

    pioneerguy600 Lost in Space Staff Member

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    Would a Silvey not do?
     
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  7. merc_man

    merc_man Addicted to ArboristSite

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    I though they were the same thing.

    Sent from my SM-J320W8 using Tapatalk
     
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  8. Huskybill

    Huskybill ArboristSite Operative

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    Here’s some info.



     
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  9. RandyMac

    RandyMac Stiff Member

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    The difference is that a plunge cut is a continuous cut, bucking the bind, without wedges.
     
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  10. Philbert

    Philbert Chainsaw Enthusiast

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    IMG_2095.JPG
    'Plunge' or 'bore'?

    Philbert
     
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  11. JimM

    JimM ArboristSite Guru

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    If the center hole is there first, I’m not certain it’s either.
     
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  12. Philbert

    Philbert Chainsaw Enthusiast

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    'Mortise'?

    Philbert
     
  13. Huskybill

    Huskybill ArboristSite Operative

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    At the speed cutting competition at the local fairs when they had it I took a 2100 with a 16” bar and did 8 cuts in 17.5 seconds.
     
  14. Westboastfaller

    Westboastfaller Addicted to ArboristSite

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    "Dave's top ten list"
    #10)
    ....what he said
    #9)
    .... One goes in, one goes out
    #8)
    what the other guy said
    #7)
    people like to make chit up as they go
    #6)
    plunge is easier to comprehend & spell than excavating
    #5)
    it just depends on my mood.
    #4)
    it's all in the filing
    #3)
    plunge is a made up term that comes from the people that say "ful"l skip, "full" chisel and "full" wrap
    #2)
    one's for the log and ones for the lady but we're subject to change

    ....and Dave's # 1, top 10 list of
    "What is the difference between plunge cut and bore cut

    #1) I just thought one was 'American' and one was Canadian
     
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  15. Philbert

    Philbert Chainsaw Enthusiast

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    And I thought that I was going to be 'bored' with your response!

    (Thanks for taking the plunge!)

    Philbert
     
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  16. woodyman

    woodyman Addicted to ArboristSite

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    I have a few huskys that say they don't care,sometimes the trees just fall down from fright when they see them.I do like to plunge though.
     
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  17. Huskybill

    Huskybill ArboristSite Operative

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    Plunge, bore it’s all good. Right?
     
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  18. Bwildered

    Bwildered Addicted to ArboristSite

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    They are totally different, it's like six of one & half a dozen of the other.
    Thanski
     
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  19. Philbert

    Philbert Chainsaw Enthusiast

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    'Thank you' for all who have replied. I am sticking with the 'different terms for the same thing' point of view.

    Below, for anyone else with OCD, are some references I found that support the terms being used interchangeably.

    Philbert

    Glossary of Forest Engineering Terms
    https://www.srs.fs.usda.gov/forestops/glossary/
    Boring - Starting a cut in the center of a log using the tip of the saw blade. Also known as a plunge cut (24).
    Plunge cut - Starting a cut in the center of a log using the tip of the chain saw blade. Also known as boring (24).
    ----------------------------------------------------------------------------------------------------------------
    STIHL MS 461 Instruction Manual
    (pages 11 - 12, with illustrations) Similar language in other STIHL manuals.

    Plunge cutting
    - For felling leaners
    - For relieving cuts during bucking
    1. Begin cut by applying the lower portion of the guide bar nose – do not use upper portion because of – risk of kickback. Cut until depth of kerf is twice the width of the guide bar.
    2. Swing saw slowly into plunge-cutting position – take care because of the risk of kickback or pushback.
    3. Make the plunge cut very carefully. Danger of pushback.

    Screen shot 2018-06-11 at 9.56.24 PM.png Screen shot 2018-06-11 at 9.56.35 PM.png
    ----------------------------------------------------------------------------------------------------------------
    Game of Logging Reference
    https://web.extension.illinois.edu/...ng/UIUC_Tims_Tips_Chainsaw_Safety/backcut.pdf
    " 2. The Bore Cut - Trees with backward or forward lean pose some difficulty and generally require the formation of a proper hinge prior to completing the back cut. On these trees it is recommended that the logger use the bore or plunge cut as the first step in making a back cut."
    ---------------------------------------------------------------------------------------------------------------
    Wildland Fire Chain Saws S-212 Student Workbook December 2012
    National Interagency Fire Center,National Wildfire Coordinating Group (NWCG)

    page 4A.14 Boring is a bucking method that can be used when space is limited under a log. You should gain proficiency with other bucking cuts first before attempting this cut.

    page 4C.8 Boring to determine a tree’s soundness is an important technique, but it must be done properly because it has the potential for kickback. Using the guide bar nose, bore into the area 90 degrees to the holding wood (hinge).

    page 4C.29 Two methods for removing leaners are a boring back cut and a triangle cut. You should gain experience before attempting these cuts.
     
  20. Canyon Angler

    Canyon Angler ArboristSite Guru

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    Wow, that's some exhaustive research for a pedantic, semantic tempest in a teapot...
     
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