9 Specimens provided. Cast surface values for Die Casting, Investment, Shell, Centrifugal, Permanent Mold Ferrous and Non-Ferrous, Sand and Green Sand from 20 to 900 microinches.
Cast Microfinish Comparator – provides industry with established flat surface roughness specimens for visual and tactual comparison of surfaces produced by casting manufacturing operations. It is used in specifying and controlling surface roughness when a product having the appearance of typically as-cast surfaces required. The Microfinish Comparator provides an economical tool which permits roughness to be specified on the same basis as linear measurements.
The Cast Surface Roughness Scale provides an economical tool which permits roughness to be specified on the same basis as linear measurements. Details covering this subject are now published in The American National Standards Institute (ANSI) specification titled: “Surface Texture, Surface Roughness, Waviness and Lay”. ANSI/ASME B46.1 Surface Roughness Scale is made by a dual electroforming process wherein nickel is electrodeposited to provide an exact reproduction in intricate detail. The surfaces used in this scale are reproductions of accurately turned surfaces measured in microinches (millionths of an inch- 0.000001″). The numbers engraved alongside each surface are the average deviation from the mean surface expressed in microinches.
Made in U.S.A
Also comes in metric with micrometer designations.