Value Collection 640-0101 Granite Inspection Surface Plate

Product Description

The VALUE COLLECTION 640-0101 is a B Grade granite inspection surface plate designed for dimensional verification and precision measurement work. Machined from black granite, this plate provides a stable, flat reference surface for layout, inspection, and gauging tasks. The 640-0101 measures 12 inches long by 9 inches wide and 2 inches thick, with an overall unilateral flatness tolerance of 0.0002 inches. A certificate of conformance is included. The no-ledge configuration keeps the working surface unobstructed, making it well suited for a range of inspection setups used by machinists, quality technicians, and tool room personnel.

This surface plate is intended for use in machine shops, quality control labs, and tool rooms where a reliable flat reference is required for part inspection, layout marking, and precision gauging. The B Grade designation indicates suitability for general-purpose inspection work. The manageable footprint and 30-pound weight make this plate practical for benchtop installation at a fixed inspection station.

Key Features

• B Grade flatness with 0.0002-inch unilateral tolerance for general-purpose inspection
• Black granite construction provides a stable, non-magnetic reference surface
• No-ledge design keeps the full working surface clear and accessible
• 12 inches x 9 inches x 2 inches overall dimensions suit benchtop use
• Certificate of conformance included for quality documentation requirements

Compatibility

Designed as a general-purpose B Grade inspection surface plate for benchtop dimensional measurement, layout, and gauging applications in machine shop and quality control environments.

Installation Notes

Surface plates should be installed by a machinist or quality technician on a stable, level bench or stand rated to support the plate weight of 30 pounds. Before placing the plate, confirm the support surface is flat and free of debris that could cause uneven bearing. Avoid dropping or impacting the granite, as chipping or cracking will compromise flatness. Periodic recalibration against a certified reference standard is recommended to maintain measurement integrity.