Torque in confind space

Hi All;

I had come across a thread in another post that someone was trying to torque down a nut in confined space. He could only get an open-end wrench on it.

If you have the same problem you can purchase what is called a [ame="http://www.amazon.com/Sunex-9720-Fractional-Straight-Crowfoot/dp/B000LQG3XQ/ref=sr_1_9?ie=UTF8&qid=1412439859&sr=8-9&keywords=crowfoot+wrench"]crowfoot[/ame], which has an open end and square opening for socket wrench. To calculate the new torque needed as follows:

New Torque = Old Torque / (1 + (Length of Crow-foot (ins)/12))

Make sure that the crowfoot and socket wrench are in strait line to maintain accuracy!

Example:

Old Torque = 79 ft/lbs
Length of Crowfoot wrench is 1-3/8” or 1.375 that is center of open end to center of square
If not sure place on bolt with nut to find center.

79/(1+(1.375/12)) = 70.88 or approximately 71 ft/lbs

If you do this a lot I have enclosed spreadsheet to calculate

Hope this helps!!
 

Attachments

  • CrowFoot.xls
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