Granite Surface Plates
Close-grain black granite, precision lapped. Designed around your application and supplied unmounted — for a bench, a stand, a cabinet or your own structure.

A granite surface plate provides a non-magnetic reference datum with high stability in controlled environments. Specified for standards rooms, gauge inspection, CMM checking and electronic assembly measurement.
Specification.
Material
Close-grain black granite
Finish
Precision lapped
Standard
DIN 876-1 and BS 817:2008
Largest single piece
6,000 x 3,000 mm
Grade
DIN 876-1 grades 00, 0 and 1, to specification. Grade is a function of size
Properties
Non-magnetic, corrosion resistant, chemically inert
Interface
Threaded, reamed or hard bushed holes, keyways, slots and T-slots, produced with cast iron or stainless steel elements bonded in — T-slots to DIN 650, H12 - H7 to specification; standard, bespoke, or duplicates of those on your existing tooling
Options.
Support
At the Bessel points, with additional support points appropriate to the loading.
Levelling
Wedge levellers or AVM feet
Specification notes.
Installation
Delivered, installed, levelled and certified by us, with full technical and GA drawings. Supply only if you prefer
Bonded elements
Every cast iron interface feature is available in granite, produced with cast iron or stainless steel elements bonded in, chosen to suit the load.
Certification
Certificate traceable to national standards; UKAS-accredited calibration on request
Terminology
Also specified as granite inspection plates or precision granite plates.
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