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Thread: Custom Wrench

  1. #11

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    Quote Originally Posted by Don52 View Post
    Attached is a picture with the calculaton for the diminished torque when used with an extension. (Courtesy of Dale M.)
    This formula differs from the BELKNAP calculator.
    The Divisor A ( first calculation) and Dividend A (second calculation) should replaced by the L (length of wrench) in both cases.

  2. #12

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    nice job. what did you do to heat treat it after bending and welding it? i ask becuase i fix specialty tools at work sometimes when they break and from what ive learned if you dont treat it some how its just gona break again. so far what works best for me it get it red hot then quinch in heat treat oil. those calculation charts are cool good to know. do you guys not have a torque checker? we have one at work and its amazing how much different extenstions and what not change the torque.

  3. #13
    Join Date
    May 2008
    Location
    Troy, MI
    Posts
    340

    Default

    Quote Originally Posted by R W View Post
    This formula differs from the BELKNAP calculator.
    The Divisor A ( first calculation) and Dividend A (second calculation) should replaced by the L (length of wrench) in both cases.
    The Belknap calculation is correct.
    The one in my previous post is wrong.
    Attached is my derivation.
    Sorry for the confusion
    Attached Images Attached Images
    Last edited by Don52; 09-09-2012 at 09:57 PM.

    Miller Thunderbolt
    Smith Oxyacetylene Torch
    Miller Dynasty 200DX
    Lincoln SP-250 MIG Welder
    Clausing/Coldchester 15" Lathe
    16" DuAll Saw
    15" Drill Press
    7" x 9" Swivel Head Horizontal Band Saw
    20 Ton Arbor Press
    Bridgeport

  4. #14
    Join Date
    Sep 2012
    Posts
    15

    Default

    Thanks!!!!!!!!!!!!!!!!!!!!!!!!!

  5. #15
    Join Date
    May 2008
    Location
    Troy, MI
    Posts
    340

    Default

    Quote Originally Posted by slow50 View Post
    what did you do to heat treat it after bending and welding it? i ask becuase i fix specialty tools at work sometimes when they break and from what ive learned if you dont treat it some how its just gona break again. so far what works best for me it get it red hot then quinch in heat treat oil.
    In this case the hot bend in the wrench was so far away from the bolt that the stress was very much diminished by the moment arm of the extension so I just let the wrench cool off in the air.

    Miller Thunderbolt
    Smith Oxyacetylene Torch
    Miller Dynasty 200DX
    Lincoln SP-250 MIG Welder
    Clausing/Coldchester 15" Lathe
    16" DuAll Saw
    15" Drill Press
    7" x 9" Swivel Head Horizontal Band Saw
    20 Ton Arbor Press
    Bridgeport

  6. #16
    Join Date
    May 2008
    Location
    Troy, MI
    Posts
    340

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    The engineer on the wrench project wanted to use a wrench that had a part number and was readily available from McMaster Carr because we can get it delivered overnight for standard shipping. Unfortunately the Armstrong version of the ratcheting box wrench that McMaster Carr stocked didn’t have a stop on it so the hex would pass right through it. To solve the problem I drilled a 3/32” hole thru the hex using a solid carbide drill because the hex is hardened. I was surprised when I pressed a 3/32” spring pin into the hole because the hardened hex key shaved the OD spring pin as you can see. For the second longer hex I drilled a 1/8” hole and glued in a 3mm dowel using Loctite 680. This resulted in a neater job.
    Attached Images Attached Images

    Miller Thunderbolt
    Smith Oxyacetylene Torch
    Miller Dynasty 200DX
    Lincoln SP-250 MIG Welder
    Clausing/Coldchester 15" Lathe
    16" DuAll Saw
    15" Drill Press
    7" x 9" Swivel Head Horizontal Band Saw
    20 Ton Arbor Press
    Bridgeport

  7. #17
    Join Date
    Jun 2012
    Location
    McHenry, Il
    Posts
    23

    Default Sweet and neat

    Nice welding

    Just jim

  8. #18
    Join Date
    May 2008
    Location
    Troy, MI
    Posts
    340

    Default

    Attached is a picture of the wrench in operation.
    Attached Images Attached Images

    Miller Thunderbolt
    Smith Oxyacetylene Torch
    Miller Dynasty 200DX
    Lincoln SP-250 MIG Welder
    Clausing/Coldchester 15" Lathe
    16" DuAll Saw
    15" Drill Press
    7" x 9" Swivel Head Horizontal Band Saw
    20 Ton Arbor Press
    Bridgeport

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