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Conventional Machining Microfinish Roughness Comparator
This Microfinish Surface Roughness Comparator provides you with established flat surface roughness specimens for visual and tactual comparison. It is used in specifying and controlling surface roughness when a product having the appearance of typically machined surfaces required. The Microfinish Comparator provides an economical tool which permits roughness to be specified on the same basis as linear measurements. The surfaces presented are the result of years of research and engineering.
Specifications:
- The Conventional Machining Microfinish Roughness Comparator is rectangular in shape (2" x 5 3/8") and is a corrosion resistant electroformed nickel duplicate of actual machined surfaces.
- There are twenty two replicated machined surface finish specimens with examples of six different machining processes: lapped, ground, blanchard ground, shape-turned, milled and profiled - ranging from 2 to 500 microinches.
- Supplied in a leatherette case with engineering data and instructions.
- Also available in metric with micrometer designations.
The Surface Roughness Scale provides an economical tool which permits roughness to be specified on the same basis as linear measurements. The surfaces presented are the result of years of research and engineering. 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.
Easy to use:
Place the Microfinish Roughness Comparator Scale alongside your work piece. Slide the scale so that the rectangle with the surface roughness you want is adjacent to the piece you are examining. Compare by drawing the tip of the fingernail across each surface at right angles to the tool mark. The feel of the fingernail contact must be the same if the finishes are identical.
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