The overall flatness specifications of Granite products meet and surpass the requirement set forth by Federal Specification GGG-P-463c. This publication defines the three standard grades of tolerance for surface plates as follows:
AA – Laboratory Grade: For high precision operations in consistent temperature gauging rooms and metrology departments
A – Inspection Grade: For general use in quality control areas
B – Toolroom Grade: For shop work and production checking
Granite Surface Plates are available with 0-Ledge, 2- Ledge or 4-Ledge – Depending if you are going to want to clamp accessories to the side of your plate. (shown 4-Ledge Surface Plate)
SURFACE PLATE STANDS
- Available Stationary or Castered Stands are made for each plate to meet a 36” working height unless specified otherwise.
- Cabinet stands available
In addition to Granite Surface Plates and Stands Kerley Corporation offers numerous granite Accessories:
GRANITE Comparator Stands: 6″ x 6″ to 18″ x 24″ Stands available. Custom Sizes available.
One large face and two edges flat and square to each other with lightening holes. Calibrates X,Y, Z axes on CNC machines, milling machines, coordinate measuring machines.
MASTER GRANITE SQUARES:
One large face & four edges flat, square and parallel to each other with lightening holes. All granite products available in custom sizes and thicknesses, with threaded inserts, without lightening holes.
• 2-Face finished on narrow edges • 4-Face finished on narrow & wide edges
GRANITE STRAIGHT EDGES (left): Measured on center line of gauging surface- narrow edge.
“V & Base” 90° Vee centered with and parallel to base
“Universal” 90° Vee centered with and parallel to bottom and two sides, and square to the ends.
GRANITE ANGLE PLATES:
2-FACE Bottom and adjacent square face finished flat and square to each other.
4-FACE Same as 2-face, with adjacent sides finished flat, square, and parallel.