Gar G-61 | 250 - 2000 Microinches Surface Roughness Scale Comparator w/12 Finish Specimens - 4 Machining Types

Twelve replicated machined surface finish specimens with examples of four different machining processes: Shape-turn, ground, profiled and milled- ranging from 250 to 2000 microinches.

The G-61 Microfinish Comparator 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 machined 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. The G-61 Microfinish Comparator Surface roughness Scale provides industry 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 is required. The G-61 Microfinish Comparator 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.

Features:

• Roughness scale for inspection
• 12 Precision finish specimens
• Samples include the following machining processes: Ground, profiled, shape-turned and milled
• Range 250-2000 microinches
• Accuracy of a millionth of a inch 0.000001"
• Genuine leather sleeve