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Black Granite Surface Plates – B 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 B Shop Grade
  • Accuracies range from 200 – 4000 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:
517-909 - 24 x 48 x 5" 600μin 650 lbs
517-911 - 30 x 48 x 6" 600μin 1000 lbs
517-917 - 48 x 48 x 6" 800μin 1500 lbs
517-920 - 48 x 84 x 10" 1400μin 4450 lbs
517-921 - 48 x 96 x 10" 1600μin 5150 lbs
517-923 - 48 x 120 x 14" 2800μin 8800 lbs
517-924 - 48 x 144 x 14" 3200μin 10500 lbs
517-925 - 60 x 60 x 10" 1000μin 4000 lbs
517-926 - 60 x 72 x 10" 1400μin 4900 lbs
517-927 - 60 x 96 x 10" 2000μin 6500 lbs
517-928 - 60 x 120 x 12" 2800μin 9800 lbs
517-929 - 60 x 144 x 14" 3600μin 14200 lbs
517-930 - 72 x 72 x 10" 1600μin 5700 lbs
517-931 - 72 x 96 x 12" 2000μin 9200 lbs
517-932 - 72 x 120 x 12" 2800μin 11400 lbs
517-933 - 72 x 144 x 14" 4000μin 15900 lbs