Q-Mark Product Spotlight for February 2018


End the guesswork over the correct thread and ball sizes for your probe system. Our thread card has ten tapped holes between M2 and 3/8”-24 to check the thread size, and ten holes ranging from 1.0 to 6.0 mm to gage the ball size. A built-in 40 mm engraved scale confirms the stylus length. We make these from aircraft grade aluminum that is anodized and laser engraved. Protective slip cover included.


They're available at www.probe.tips. Just type "thread card" in the search box.

          Q-Mark Product Spotlight for January 2018



What is silicon nitride?


Silicon nitride is an extremely hard hybrid ceramic (Si3N4) with a very low coefficient of friction.  It’s used in high-speed spindle bearings and aircraft flap actuators to provide longer service life in demanding environments.


Why are silicon nitride styli better than ruby styli?


When ruby balls touch soft materials - aluminum, for example - they tend to accumulate tiny bits of the material on the ball.  Over time, this build-up of metal on the ball can result in measurement errors.  When this happens, the stylus must be discarded.


When ruby balls are used on hard or abrasive materials, they can develop flat spots caused by wear.  When a flat spot appears, the stylus must be discarded.


Silicon nitride has a significantly lower coefficient of friction than ruby.  It's extremely hard, too - about 78 Rc.  Therefore, silicon nitride balls exhibit less wear and don't tend to accumulate material on their surface like ruby balls. Our clients report up to 5 times longer tool life in demanding applications using silicon nitride balls instead of ruby.

          Q-Mark Product Spotlight for December 2017



Ever-increasing accuracy requirements are driving probe sensor technology to higher levels of sensitivity. In many cases, this drive has reduced the amount of stylus weight that a probe sensor will tolerate. Q-Mark has responded to this need by producing a full line of ultra-light styli and stylus extensions.

In the pictures, three Q-Mark styli plus one 50 mm extension (Figure 1) weigh 4.40 grams, combined. By contrast, a newly minted nickel (Figure 2) weighs over half a gram more.

We achieve this extraordinary weight reduction by incorporating titanium and carbon fiber elements in our products. Since we do all the manufacturing and assembly, we can monitor the product weight at every step of the process. Titanium and carbon fiber offer the added benefit of very high stiffness-to-weight ratios.

If your CMM needs to go on a weight-loss campaign for the sake of accuracy, turn to Q-Mark for immediate gratification.


          Q-Mark Product Spotlight for November 2017

ProFit Products

Disk Styli


Disk styli are used to probe interior grooves. The fascinating thing about disk styli is that there are seemingly no two alike. As part geometry varies, so do disk stylus dimensions. We get requests for custom disks, like the one pictured, nearly every day. Visit our website, www.cmms.com, and click on the tab “Design Your Own”. You’ll have it in a surprisingly short time.