Probes and Styli

EMI Gage is your complete source for stylus repair and replacement, and for new and custom styli as well. When you’re dealing with a damaged probe, we work hard to get you back up and running, fast.

Stylus Repair

EMI Gage capabilities include microscopic evaluation of diamond tips, setting diamonds, precision grinding, machining, assembly, and component replacement. Our repair estimates are always free, and we only make repairs if they’re required.

We can typically repair styli within one week—for less than 1/3 the cost of OEM replacement. Simple repairs can often be completed in a day, and even complex repairs can often be expedited within 2–3 days.

We replace or repair styli from all major instrument manufacturers, including smaller companies such as ABtech, PCM, and QPM—even companies that are no longer in operation!

Replacement Probes and Styli

EMI Gage can manufacture replacements for virtually any surface roughness, roundness, or contour probe.

Diamonds (Surface Roughness)

EMI Gage sources the finest diamonds (points) available for surface roughness measurement. The last 30 µm of the tip is highly polished to provide very consistent data over peaks and edges. This exceptional quality lets us guarantee that the tip radius will meet all ISO and ASME standards. 2, 5 and 10 µm radius. 60° and 90° cone angle in stock for all radius sizes; 30° and 40° also available.

Balls (Roundness, Radius, Contour, Profile, Form)

We offer a wide range of standard Grade 5 ruby and carbide balls (no more than 5 millionths out of round). We can also source non-standard materials and sizes through our vendors, typically for shipment within a few days. Ball diameter from 0.3 mm (0.12 in) up to 10 mm (0.39 in) or even larger. Materials include ruby, nylon, silicon nitride, carbide, zirconia, Teflon^®, sapphire, and diamond.

Carbide Contour Measurement Probes

Our replacement contour measurement probes are available for a wide range of instruments and tip materials. We also manufacture tungsten carbide probe tips for all major contour measurement gages. Visit the Carbide Contour Tips page to see our inventory and to order

The list below contains a sampling of our replacement probes. We can provide virtually any factory probe. If you don’t see what you need, use the Custom Probes form below to send us your requirements. We’ll try to source the probes for you now, and we can even stock them for you for off-the-shelf delivery the next time you need them.

Custom Probes and Styli

Need a custom diamond stylus for your application? EMI Gage is the country’s premier source for customized probes and styli, with over 30 years of custom manufacturing expertise. Our custom options are tailored to your specifications. Unique styli can often be available in a matter of weeks, for a fraction of the cost typical from OEM suppliers.

Use the form below to let us know the measurement instrument and model you are using. Then, email us a sketch or drawing of the probe or the feature(s) that you need to measure. We will get back in touch with you to discuss the specifics to design your custom styli!