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                        Torque Wrench Calibration

The ORNL Metrology Laboratory maintains the capability to calibrate and adjust torque wrenches and torque transducers.  All calibrations are performed using standards traceable to NIST.   Typical types of torque equipment calibrated by the ORNL Metrology Laboratory include torque wrenches, torque transducers, field torque wrench calibrators, etc.

The ORNL Metrology Lab provides accredited calibrations for any torque parameters within the ranges detailed in our Scope of Accreditation. In addition, traceable non-accredited calibrations are available for torque wrench calibrations from a range of 600-2000 ft lb.

The tables below list our accredited capabilities. See the following link Scope of Accreditation for the entire listing.

If you have questions about our torque capabilities, please contact the ORNL Metrology Laboratory for additional information.

Torque Transducers
(NVLAP Code: 20/M06)

Range

Best Uncertainty  (±) in %

Remarks

Accredited

5 - 50 in - 0z

0.49

 

Yes

4 to 50 in lb

0.25

 

Yes

30 to 400 in lb

0.20

 

Yes

80 to 1000 in lb

0.15

 

Yes

20 to 250 ft - lb

0.15

 

Yes

60 to 600 ft - lb

0.14

 

Yes

600-2000 ft - lb

0.15

 

Yes

 

Torque Wrenches

Range

Best Uncertainty  (±) in %

Remarks

Accredited

5 - 50 in - 0z

0.49

 

Yes

4 in lb to 50 in lb

0.26

 

Yes

30 in lb - 400 in lb

0.21

 

Yes

80 in lb - 1000 in lb

0.17

 

Yes

20 ft - lb to 250 ft - lb

0.17

 

Yes

60 ft - lb to 600 ft - lb

0.16

 

Yes

200 ft - lb to 2000 ft - lb

0.17

 

Yes

Any reference to "accredited" or "accreditation" refers to the National Voluntary Laboratory Accreditation Program (NVLAP) and applies to calibration services only as performed by the Oak Ridge National Laboratory's (ORNL) Metrology Laboratory (Lab Code 200159-0). Refer to the ORNL NVLAP scope of accreditation for details.

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