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Starrett® 80890 2-Ledge Surface Plate, 48 x 48 in Surface, 10 in THK, AA Laboratory Grade, Crystal Pink®, Smooth

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Description

Starrett® Surface Plate, 2-Ledge, 48 x 48 in Surface, 10 in Thickness, 0.0002 in Flatness Unilateral Tolerance, AA Laboratory Grade, Granite, Smooth, Crystal Pink®

48" x 48" (1200mm x 1200mm) Crystal Pink® Granite Surface Plate with a 10" (250mm) thickness. Crystal Pink® Granite has the highest percentage of quartz of any granite for superb wear resistance. Grade AA (Laboratory Grade) for precision operations in constant temperature gaging rooms and metrology departments. .000200" (0.0051mm) Flatness unilateral tolerance. Produced with 2 ledges.

Specifications

Color Crystal Pink®
Finish Smooth
Flatness Unilateral Tolerance 0.0002 in
Grade AA Laboratory
Material Granite
Surface Size 48 x 48 in
Thickness 10 in
Type 2-Ledge

Country of Origin: United States

Standards and Approvals: US Federal Specification GGG-P-463c

Application:
For metrology laboratories and wear resistant for use in abrasive shop environments

Features

  • The name is derived from the fact that it has the highest crystalline quartz content of any granite surface plate
  • Even distribution of large quartz crystals provides a smooth finish, which significantly reduces wear on the surface plate and the instruments used on it
  • Fine micro-finish, combined with the natural voids in the surface, prevents wringing and provides a velvety-smooth tool action
  • Non-quartz-bearing granite in average daily use requires resurfacing about once a year, while crystal Pink® plates used in these same plants have required resurfacing only once every three to five years, on average
  • Great surface hardness and wear resistance - the highest percentage of quartz crystals of any granite plate
  • Smooth, jewel-like quartz bearing points protect accuracy and finish of both the surface and the tools used on it
  • Quality and economy combined
  • Comparable to black granite plates while outwearing them as much as 5 to 1
  • Standard-size plates are mounted on resilient support pads, providing isolation from normal vibration and a non-distorting 3-point suspension
  • Packed one per crate with skids for forklift handling

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