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  Measurement, Test and Calibration
  calibration of torque wrenches

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Author Topic:   calibration of torque wrenches
calib
Lurker (<10 Posts)

Posts: 1
From:Philippines
Registered: Mar 2001

posted 22 March 2001 08:49 PM     Click Here to See the Profile for calib     Edit/Delete Message   Reply w/Quote
does anyone know how to calibrate torque wrenches and screwdrivers using Torque mate 200 and what other accesories are needed?

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Jerry Eldred
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Posts: 136
From:
Registered: Dec 1999

posted 02 April 2001 02:01 PM     Click Here to See the Profile for Jerry Eldred   Click Here to Email Jerry Eldred     Edit/Delete Message   Reply w/Quote
I don't know that particular model. You have to have the correct fitting adapters for the specific torque wrench or screwdriver, and if there is a spanner handle extension, you have to use the correct one, as hanbdle length impacts accuracy.

Calibrating using a digital calibrator is quite straightforward. You have to have the calibrator rigidly mounted on a good work bench. Set each unit being cal'd to desired settings and slowly and evenly check it clockwise and counter-clockwise. Set the calibrator on peak hold and reset after each reading. Repeat each reading a number of times in each direction to assure repeatability. Some people like to use loaders which apply an even smooth pressure to the units until they click over.

That's the short answer. Let me know if I can help with any further level of detail on this.

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Al Dyer
Forum Wizard

Posts: 622
From:Lapeer, MI USA
Registered: Oct 2000

posted 02 April 2001 06:11 PM     Click Here to See the Profile for Al Dyer   Click Here to Email Al Dyer     Edit/Delete Message   Reply w/Quote
Jerry,

I'd appreciate it if you would go into further detail. We use a fixture that utilizes a torque wrench to hold the part stable for further measurements and have noticed alot of variation related to the torque. Anywhere from 3-15% variation on a simple R&R.

Thanks,

ASD...

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rock
Forum Contributor

Posts: 11
From:Racine, WI USA
Registered: Apr 2001

posted 16 April 2001 10:59 AM     Click Here to See the Profile for rock   Click Here to Email rock     Edit/Delete Message   Reply w/Quote
There's an ANSI standard B107.14M-1994 that may be helpful. You can get it from ANSI or you might try Global.

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TorqueGuy
Forum Contributor

Posts: 10
From:Ontario, Canada
Registered: Jan 2001

posted 18 May 2001 01:32 PM     Click Here to See the Profile for TorqueGuy   Click Here to Email TorqueGuy     Edit/Delete Message   Reply w/Quote
You may also want to look up the ISO 6789 spec

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