Easy To Use Tap Drill Decimal Equivalent Chart


Robb Precision Tool Services Launches its New Website



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Robb Precision Tool Services Launches its New Website with Enhanced Features, Making it Quick and Easy to navigate.

Our new website includes our new and expanded calibration and repair capabilities of precision tools and torque wrenches. Including,
our extensive line of CDI torque wrenches.

This new website offers several features including our new contact page, making it easier to request a quote, pick up, delivery or onsite calibration. As well as a new personal log in page to view all A2LA cerificates.

Robert Robb, owner. “With our business rapidly growing, we found the need to update and redesign our website. We have a new modern look and have made it easier to navigate to our customer’s specific needs. We are also excited to present our new expanded capabilities for both calibration and repair.”

About Robb Precision Tool Services

Robb Precision Tool Services is an A2La accredited calibration lab which follows the A2LA standards with ongoing training and testing to ensure the most recent methods are followed. Specializing in certification, repair and sales including micrometers, calipers, indicators, various gages, hardness testers, optical comparators, weighing scales and torque wrenches. With over three decades of experience in the field of metrology and torque.

For more information, please contact Bob Robb at (425) 672-7307 or bob@robbprecisiontool.com

How do you know if your Torque Wrench needs repair?


5 Reasons Your Torque Wrench Might Need Repair

1) The torque wrench begins to get hard to turn.

2) There is Oxidation on ratchet kit.

3) Regular outdoor use.

4) Use in temperature room under 45 degrees.

5) Never been calibrated.


5 Ways to Prevent Damage to your Torque Wrench

1) Always keep it in a case.

2) At the end of use, set value at 20% of its max value.

3) Store torque wrench at 55 degreesa or warmer.

3) Keep away from water.

5) Regular cleaning of torque wrench.


Vision for a 12 acre campus on Paine field for aviation enthusiasts


John Sessions points out an area at Paine Field on Dec. 12 that he hopes to

further develop into a hub for aviation enthusiasts

 His idea would create a 12-acre campus at Paine Field for studying and

restoring vintage planes.


Largest Aviation Event in Washington February 22nd and 23rd








trade pic

Its our BIG sale of the year!




Torque Wrench Facts


Torque Wrench Usage

• All mechanical torque wrenches are calibrated from 20% to 100% of full scale, therefore, they
should never be used below or above those limits
• To determine which torque wrench capacity is best suited for an application, many factors must
be considered. However, as a recommendation, use a torque wrench in the middle 50% of the
overall capacity of the tool. This will result in longer tool life, ease of use for the operator and
increased accuracy from “clicker” type torque wrenches
• Always grasp handle fi rmly in the center of the grip
• Approach fi nal torque slowly and evenly
• Stop pulling wrench immediately when target torque is reached
• Never use a torque wrench to break fasteners loose
• Should be cleaned and stored properly
• Should always be stored at it’s lowest torque setting
• Wrenches should be re-calibrated if dropped. Should never be used in excess of it’s capacity
• Torque wrenches should be “exercised” a minimum of three times at 100% of full scale before
• The wrench selected should be calibrated in the same torque units that are specifi ed
• Use of a “cheater bar” will result in an inaccurate reading and can possibly damage the wrench
• Torque wrenches will last longer if reasonable care is taken. Always unwind handle to the lowest
setting after each use. Do not attempt to lubricate the internal torque mechanism. Clean torque
wrench by wiping, do not immerse. The wrench should be sent to a qualifi ed calibration lab once
every year or every 5000 cycles for re-calibration

Torque Conversion Table
From To  Multiply by From To  Multiply by
ft lb Nm 1.355818 Nm ft lb 0.737562
ft lb mkg 0.138255 Nm in lb 8.850745
ft lb in lb 12 Nm mkg 0.101972
in lb Nm 0.112985 Nm cmkg 10.19716
in lb dNm 1.129848 dNm in lb 0.885075
in lb cmkg 1.152125 cNm in oz 1.416119
in lb ft lb 0.083333 mkg ft lb 7.233014
in lb in oz 16 mkg Nm 9.80665
in oz cNm 0.706155 cmkg in lb 0.867962
in oz in lb 0.0625 cmkg Nm 0.09806


Common Torque Abbreviations 

ft lb = Foot Pound   [lb ft, lbf ft]
in lb = Inch Pound   [lb in, lbf in]
in oz = Inch Ounce   [oz in, ozf in]
Nm = Newton Meter   [N m]
cNm = Centi Newton Meter   [Ncm, N cm]
dNm = Deci Newton Meter
mkg = Kilogram Meter   [kg m, kgf m, kgm]
cmkg = Kilogram Centimeter   [kg cm, kgf cm