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Thread: Torque Values

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  1. #1

    Join Date
    Jun 2013
    Location
    Missouri
    Posts
    28

    Default Torque Values

    Looking through the manual, there are several torque values ranging from 10 - 15 in/lbs. Finding torque wrenches starting at 20 in/lbs but wrenches that can go as low as 10 in/lbs tend to be very expensive. Any suggestions? Is it as simple as tighten to prevent lateral movement and not so tight that the parts won't move?

  2. #2
    Senior Member Dave S's Avatar
    Join Date
    Oct 2008
    Location
    St Paul, MN
    Posts
    1,833

    Default Re: Torque Values

    MoFlyer Mike,

    Now you hit a subject dear to my heart

    You do fish in Missouti, right?

    One of my favorite tools for torquing stuff where the normal wrench doesn't fit or the torque values are off scale is this:

    1) Get a fish scale.....calibrate it with a known weight....I have found that most fish scales are biased towards the end of the scale that makes a fish person feel exceptionally good about their catch FWIW - scales of this type, if they have an error, are off by a percentage so using a known weight towards the high end of what the scale reads will do just fine. Figure out the % error and write it on the scale for reference.

    2) Pick out a combination wrench where the open end fits the fastener and the closed end can be used to hook your scale...

    3) Measure the distance center to center on your combo wrench in inches and do the math for the torque value. Be sure to apply your correction factor determined in 1) above to the reading.

    4) When applying torque with the scale, be sure to keep it tangent to the arc of the wrench for accuracy.

    Very inexpensive solution. Neither the cost of the wrench nor the presence of a computer chip in it necessarily determines accuract....calibration does. The scale method also lets you see where you are on torque as you approach the target value compared to the snap/click wrenches.

    Sincerely,

    Dave S

  3. #3

    Join Date
    Jun 2013
    Location
    Missouri
    Posts
    28

    Default Re: Torque Values

    Excellent Dave! I do have access to calibrated weights for our scales so known weights shouldn't be a problem. Could be an issue with the setup in some locations of nuts on the airframe but will work around them.

    Thanks again,

    Mike

  4. #4
    Senior Member jiott's Avatar
    Join Date
    Jun 2010
    Location
    Portland, OR
    Posts
    2,960

    Default Re: Torque Values

    I found a simple old fashioned flexing beam with scale type torque wrench at a motorcycle shop for reasonable price. It is sized for torques down in the 10-50 in-lb range.
    Jim Ott
    Portland, OR
    Kitfox SS7 flying
    Rotax 912ULS

  5. #5

    Join Date
    Aug 2009
    Location
    Durham, ME
    Posts
    73

    Default Re: Torque Values

    Not sure what is considered expensive, but I found a 3/8 drive at Harbor Freight that adjusts from 5 to 80 foot pounds for $21.99.

    Link: http://www.harborfreight.com/3-8-eig...rench-807.html
    RobS

  6. #6

    Join Date
    Aug 2009
    Location
    Durham, ME
    Posts
    73

    Default Re: Torque Values

    I think I see what I missed - you need inch pounds!
    RobS

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