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Black Granite Surface Plates – A Grade

The Mitutoyo Black Granite Surface Plates are made of exceptionally fine-grained black granite free from deterioration and dimensional changes, offering many advantages over cast iron surface plates.

Features & Benefits

Constructed of natural fine-grain granite seasoned for thousands of years, the Mitutoyo Black Granite Surface plates are free from burrs, protrusions, rust, and wringing, making them ideal for precision measurement platforms. The granite plates are twice as hard as cast iron plates and feature superior flatness, non-magnetic properties and longer service life resulting in low maintenance costs and better accuracy.

  • Available in A Inspection Grade
  • Accuracies range from 100 – 2000 μin
  • Available in 100lbs. load/sq. ft. no ledge
  • Trouble-free operation for use with magnetic materials
  • Mitutoyo granite surface plates include a Certificate of Accuracy with traceability to NIST
  • Mitutoyo granite surface plates meet or exceed federal specification GGG-P-463c
  • Surface plates needed in specific sizes other than standard are available by special order
  • Surface plates, with the bolt screws, available by special order
  • All Mitutoyo surface plates shipped F.O.B. Escondido, CA
  • All granite plates from 48”x 108” and larger are machine-base gray granite; smaller plates are black granite
Product List
Order No.: Product Image: Size: Accuracy: Weight:
517-800 - 8 x 12 x 2" 100μin 25 lbs
517-804 - 18 x 18 x 4" 100μin 150 lbs
517-809 - 24 x 48 x 6" 300μin 800 lbs
517-812 - 30 x 60 x 10" 500μin 1535 lbs
517-817 - 48 x 48 x 6" 400μin 1525 lbs
517-818 - 48 x 60 x 10" 500μin 3150 lbs
517-819 - 48 x 72 x 10" 600μin 3800 lbs
517-820 - 48 x 84 x 12" 700μin 5325 lbs
517-821 - 48 x 96 x 12" 800μin 6050 lbs
517-822 - 48 x 108 x 12" 1000μin 6830 lbs
517-823 - 48 x 120 x 16" 1400μin 10160 lbs
517-824 - 48 x 144 x 16" 1600μin 12200 lbs
517-825 - 60 x 60 x 12" 500μin 4800 lbs
517-826 - 60 x 72 x 12" 700μin 5750 lbs
517-827 - 60 x 96 x 12" 1000μin 7600 lbs
517-828 - 60 x 120 x 14" 1400μin 11100 lbs
517-829 - 60 x 144 x 16" 1800μin 15100 lbs
517-830 - 72 x 72 x 12" 800μin 7000 lbs
517-831 - 72 x 96 x 14" 1000μin 10800 lbs
517-832 - 72 x 120 x 14" 1400μin 13400 lbs
517-833 - 72 x 144 x 16" 2000μin 18100 lbs