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Re: TML is Right, but he's also wrong! Posted by TML [Email]  (#2212)  [Profile/Gallery]
(more from TML) on Sun, 12 Aug 2012 11:25:16
In Reply to: TML is Right, but he's also wrong!, marvinstockman, Sun, 12 Aug 2012 07:37:16 Members do not see ads below this line. - Help Keep This Site Online - Signup |
I didn't say it halves the torque, but it does reduce it significantly. Put a torque wrench on a calibrator and test it, you will discover I am correct. Or call up the engineering or calibration department of a major torque wrench manufacturer, and ask them. Think about it; the pivot point that sets the torque is inside the tube of the wrench, in between the handle and the ratchet head. If you move the handle further away, which is in effect what you are doing when you put a pipe on the end of the wrench, then you are affecting the geometry of the mechanism. Just like it's easier for you to apply torque with a longer lever, the mechanism releases easier when the ratio of the handle-to-pivot and pivot-to-ratchet distances increases. Conversely, if you pull the wrench mid way up the tube, the actual torque applied will be a lot more than the setting; if you move past the pivot point, then you negate it completely, and the wrench will never click, allowing infinite torque, only limited by your strength and the breaking point of the parts or bolt.
posted by 24.246.55...
, Sat, 11 Aug 2012 15:35:29, Sat, 11 Aug 2012 20:49:36, Sun, 12 Aug 2012 11:25:16 <-- Viewing This Message
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