Improve Your Measurement and Achieve Perfect Flatness!

Nice grade of granite slab for my primary home use of block sanding and refurbishing small machined part surfaces with fine sandpaper. My slab appears to be very flat. Good value for the price.--Steven

Why Buy the Granite Surface Plate? 

✅Flatness Measurement: Granite surface plates are precision tools used for measuring flatness, squareness, and other geometric characteristics. They serve as a stable reference surface for inspecting, calibrating instruments, checking parallelism/perpendicularity, and measuring heights with a height gauge.

✅Key Features: These plates are precision ground with a flatness accuracy of ±0.0001" (Grade B, Grade 1), meeting Federal Specifications GGG-P-463C. They are non-magnetic, non-conductive, harder than steel, and resistant to nicks and burrs.

✅Material Benefits: Made from quartz-bearing black granite, these plates are more wear-resistant, inherently stable, and rust-proof. Granite offers excellent vibration damping, making them ideal for high-precision work environments.

📝 FREQUENTLY ASKED QUESTION

Q: What is the accuracy level of a Grade B (Grade 1) granite surface plate?

A: A Grade B granite surface plate offers an accuracy of ±0.0001". This level of precision makes it suitable for a range of inspection and calibration tasks, including measuring flatness, squareness, and height.

Q: How should I maintain and care for my granite surface plate to ensure long-term accuracy?

A: To maintain your granite surface plate’s accuracy, clean it regularly with a lint-free cloth and a non-abrasive cleaner. Avoid placing heavy or sharp objects directly on the surface to prevent scratches or damage. It’s also recommended to periodically check for flatness and recalibrate if necessary to ensure continued precision.

⚙️ Specifications:

6 x 8 x 2”

Material: Granite

Weight: 11 lbs

Package Inclusions: 1 x Granite Surface Plate

12 x 9 x 3”

Material: Granite

Weight: 40 lbs

Package Inclusions: 1 x Granite Surface Plate

18 x 12 x 3”

Material: Granite

Weight: 80 lbs

Package Inclusions: 1 x Granite Surface Plate