Granite Solutions
Planekator
Granite reference surfaces
Granite solutions are reference surfaces and standards of extremely high flatness and stability. Starrett makes them in Crystal Pink® and Superior Red granite—the latter with the highest quartz content for greater wear resistance—in AA (laboratory), A (inspection) and B (shop) grades.
The Planekator measures the overall flatness of the surface plate with accuracy comparable to an autocollimator, but without complex calculations: it takes direct readings with an indicator. Its measurements are NIST traceable and comply with ISO/IEC 17025.
Main features
High-flatness reference surface
Grades AA (laboratory), A and B
Stable, durable black granite
Brand
Typical applications
- Reference surface for inspection
- Layout and marking base
- Mounting of measuring instruments
- Flatness verification
- Height gage base
- Inspection of machined parts
- Instrument calibration
- Metrology laboratory
- Quality control
Featured products
| Appearance | Description |
|---|---|
| Function | Measures the overall flatness of the plate (autocollimator-type accuracy). |
| Kit includes | Granite straight edge with handles, stands (fixed and adjustable), 0.00002" indicator and carriage. |
| Rule | Must cover the full width and ≥50% of the plate length (e.g. 36" evaluates up to 36"×72"). |
| Traceability | NIST certified, ISO/IEC 17025 compliant. |
Note: The data shown is for reference only and may vary depending on the model, the manufacturer and the conditions of use.
Related products
Surface platesReference plane for part inspection and layout.
Surface plate standsSteel stands that support and stabilize surface plates.
Surface plate coversCompact surfaces for portable inspection of small parts.
Five-face master squaresX-Y-Z alignment verification on CNC and CMM.
Tri-squaresEconomical option for checking machine and CMM axes.