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Re: buy a beam type torque wrench for calibration use Posted by TML [Email]  (#2212)  [Profile/Gallery]
(more from TML) on Sun, 13 Jun 2010 18:39:36
In Reply to: Re: buy a beam type torque wrench for calibration use, Ken Fisher, Sun, 13 Jun 2010 14:46:06 Members do not see ads below this line. - Help Keep This Site Online - Signup |
They can be very accurate, but that is different than all of them being accurate. I'm curious, assuming you've done this vice experiment, on how many different wrenches did you try this, and how many different makes and models? Unless the answer is over 200 and over 40, then your sample size is too small to draw any conclusions from. You also didn't address how a 100ft-lb torque wrench with a resolution of at best 1ft-lb could possibly be within 4% when the resolution is 5% at 20ft-lb. I'll save you the work; it can't. Period. Yes, torque is simply force by distance. I don't see how that point affects anything being discussed. A beam type torque wrench does not directly transfer force and distance. Assumptions are made about the strength and flexibility of the steel, which may or may not hold true for every single one that comes off the production line. For those $30 torque wrenches, they are not checking them, it would cost them too much money. Through use the wrench can also experience metal fatigue which could affect the accuracy. On top of this, there is parallax error for when you aren't able to view the scale directly. Beam type wrenches have their advantages, but there's a lot of reasons why very few of them are in general use.
posted by 204.191.58...
, Sat, 12 Jun 2010 14:29:43, Sat, 12 Jun 2010 19:34:46, Sun, 13 Jun 2010 07:03:22, Sun, 13 Jun 2010 21:21:15, Sun, 13 Jun 2010 21:45:43, Wed, 16 Jun 2010 13:10:23, Wed, 16 Jun 2010 15:50:40, Wed, 16 Jun 2010 17:20:31, Mon, 14 Jun 2010 11:02:12, Sat, 12 Jun 2010 19:29:32, Sun, 13 Jun 2010 18:39:36 <-- Viewing This Message, Sat, 12 Jun 2010 14:49:46, Sat, 12 Jun 2010 15:21:04, Sat, 12 Jun 2010 19:20:13
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