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HHIP 4401-2418 Granite Surface Plate, Grade A, 24 x 18 x 3 in

HHIP ★ 3.3/5 · ItemOracle Score Premium

$285 USD
Price subject to change
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HHIP 4401-2418 Black Granite Surface Plate, Grade A, Ledge 0, 24" Length x 18" Width x 3" Height, +/000075" Accuracy, 150 lb. Weight

Granite surface plate with precision ground top for flatness accuracy. Includes certificate of inspection; not NIST traceable. Good for measuring flatness, squareness, and layout tasks; customers cite solid size and weight with mixed views on flatness and surface finish

Highlights

  • precision ground top
  • certificate of inspection
  • Grade A plate with specified accuracy

Pros

  • precise ground top surface
  • includes inspection certificate
  • grade A (0) specification
  • sized for small shops
  • dimensioned for stable layout tasks

Cons

  • not NIST traceable
  • mixed reviews on flatness and polish
  • possible scratches reported by some users

Best For

  • checking flatness of parts
  • layouting parts for machining
  • calibrating instruments
  • setting up tools
  • as a sanding surface (per customer insight)
  • height gauge work area

Features

  • The top surface of this plate is precision ground to achieve a high degree of flatness and the accuracy is +/-. 000075". It is a Grade A (Grade 0) plate
  • Granite surface plates meet or exceed Federal Specifications GGG-P-463C and it includes a certificate of inspection. (Note that these are not NIST traceable)
  • Granite plates are used for measuring the flatness and squareness of other objects
  • laying out parts
  • calibrating instruments
  • setting up tools
  • checking parallelism and perpendicularity
  • and measuring heights with the use of a height gage

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