We do not just certify plates; we restore precision. Learn about our accreditation and our proprietary wet-lapping process.
We are a dedicated network of metrology professionals serving the manufacturing backbone of the Midwest. Unlike generalist calibration houses that check thousands of different tools, our core focus is dimensional metrology and the foundation of your quality lab: The Granite Surface Plate.
We understand that a surface plate is not just a table; it is the reference plane for every measurement you take. If your reference is wrong, every part you ship is wrong. Our mission is to ensure that never happens.
Many independent contractors offer "calibration," but without accreditation, their sticker is just a sticker.
Our accreditation ensures:
From arrival to certification, our on-site procedure is designed for minimal disruption.
Before any measurement occurs, the plate is thoroughly cleaned with a waterless granite cleaner to remove oil, grit, and residue. We then perform a visual inspection for nicks, cuts, or physical damage that could affect instrument travel.
We utilize differential electronic levels and Hilger-Watts Autocollimators to map the topography of the plate. This creates a "map" of the highs and lows across the surface. We measure using the "Union Jack" pattern to verify flatness across diagonals and center points.
If the plate is out of tolerance, we resurface it immediately. We strictly use a "Wet Lap" process. Unlike dry lapping, which creates airborne silica dust (a health hazard and machine killer), wet lapping uses a slurry. This not only keeps your shop air clean but creates a harder, smoother finish on the granite, reducing friction and extending the plate's lifespan.
After resurfacing, the plate is cleaned and measured again to verify Grade AA, A, or B tolerances (per Federal Spec GGG-P-463c). A sticker is applied, and a full long-form certificate is generated, traceable to NIST.
We believe in transparency. We do not use budget tools to certify your precision assets.
The industry standard for measuring straightness and flatness over long distances. Used for large surface plates where electronic levels may drift.
High-sensitivity differential levels capable of detecting minute angular changes, ensuring the tightest possible flatness tolerances.
Used to verify "Local Area Flatness" (Repeatability). This ensures that your height gage reads the same measurement everywhere on the plate.