We’ve moved!

As of June 28, 2010 we’ll be located in the Alderwood Business Park.

2100 196th St. SW, Suite 144
Lynnwood, WA 98036

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Lowest Price Guarantee!

Robb Precision tool is now offering a Lowest Price Guarantee! We’ll beat any in-house calibration pricing by 5%! Along with this Guarantee we will continue to have a quick turn time so your tools are back in your shop.

Remember at RPTS we calibrate, certify and sale torque and precision hand tools.

Look for RPTS at regional trade-shows

Hello All.

Business has been good because of you.  Many people have been asking what we have been up to, so this last year we have been meeting new and existing customers at regional trade-shows.  It is great to showcase our capabilities for the public, remember at RPTS we calibrate, repair, sale and consult on precision hand tools and torque wrenches up to 2,000 ftlbs.

Hope to see you soon.

Calibration Intervals for Torque Tools

In order to maintain accuracy of tools, it is crucial that torque control tools and torque measuring equipment be calibrated regularly. We recommend 6 month or 12 month calibration intervals. However, it is the user’s organization that must determine suitable interval frequencies commensurate with their needs based upon many factors such as history of equipment performance, tool use, amount of cycles, management objectives and other application related details.

Easy-To-Use Torque Conversion Table

To Convert from:                    To:                         Multiply by:

in.oz                                       in.lb                       0.0625

in.lb                                       in.oz                       16

in.lb                                       ft.lb                        0.08333

in.lb                                       cmkg                     1.1519

in.lb                                       mkg                      0.011519

in.lb                                       Nm                       0.113

in.lb                                       dNm                      1.13

ft.lb                                       in.lb                       12

ft.lb                                       mkg                        0.1382

ft.lb                                       Nm                         1.356

dNm                                      in.lb                        0.885

dNm                                      Nm                          0.10

Nm                                        dNm                        10

Nm                                        cmkg                       10.2

Nm                                        mkg                         0.102

Nm                                        in.lb                         8.85

Nm                                        ft.lb                         0.7376

cmkg                                     in.lb                         0.8681

cmkg                                     Nm                          0.09807

mkg                                       in.lb                        86.81

mkg                                       ft.lb                         7.236

mkg                                       Nm                          9.807

How to compute torque when using adaptors

If an adaptor or extension is attached to the square drive of a click-type torque wrench and this adds to its length, then the applied torque will be greater than the pre-set torque. A formula can be used to find what the preset-set torque should be in order to obtain the correct applied torque.

Here is the formula:

RS = Torque setting of the torque wrench.

A = Distance from the center of the square drive of the torque wrench to the center of the handle grip pull point.
B = Length of the adaptor from the center of the square drive to the center of the nut or bolt. Use only the length which is parallel to the handle. See figure 1
T = Torque desired. This is the actual torque applied to the fastener. Here is a typical problem: What should the setting be when ‘‘A’’ is 12’’, ‘‘B’’ is 6’’ and ‘‘T’’ is 30 Ib. ft.

Therefore 30 pound foot of Torque will be applied at the fastener when ‘‘RS’’ is 20 pound foot.

Note: If the torque wrench reads in pound foot, then ‘‘T’’ should also be in pound foot. ‘‘T’’ and ‘‘RS’’ should be in the same unit of measurement. ‘‘A’’ and ‘‘B’’ should also be the same unit of measurement.

Snap-On Techwrench

RPTS Offering Mitutoyo Promotions

RPTS is offering an October Mitutoyo product special.  When you are looking to purchase precision hand tools, give us a call and save up to 25% on new Mitutoyo products.  Along with sales, RPTS can also certify your new tool and repair current precision hand tools.

Welcome To RPTS.

Hello All.

Robb Precision Tool Services (RPTS) is a full service A2LA accredited calibration lab. We specialize in certification, repair and sales of torque wrenches and precision tools.

With 3 decades of experience in the field of metrology and torque, we offer great solutions that come from our commitment to meeting and exceeding expectations in precision measurement.

We support and supported by Mitutoyo – Starrett – SPI – Brown & Sharpe precision tools along with CDI - Precision instruments – Snap On – Proto torque products.

Look for weekly updates and monthly specials from RPTS.