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Usage: There are 2 ways to measure roughness comparing roughness standard specimen and real goods. In case judging max height like JIS standard , sense of touch is more accurate, except very rough surface. Touching by tip of nail is more sensitive than by ball of finger. In case checking graze of surface, sense of sight is needed. Average roughness range visually and tactility perceivable is about 0.8S., Specification: Grinding:（▽:▽▽▽▽/Rmax:0.8S/Ry:0.8） Grinding:（▽:▽▽▽/Rmax:1.6S/Ry:1.6） Grinding:（▽:▽▽▽/Rmax:3.2S/Ry:3.2） Turning:（▽:▽▽▽/Rmax:1.6S/Ry:1.6） Turning:（▽:▽▽▽/Rmax:3.2S/Ry:3.2） Turning:（▽:▽▽▽/Rmax:6.3S/Ry:6.3） Turning:（▽:▽▽/Rmax:12.5S/Ry:12.5） Turning:（▽:▽▽/Rmax:18S/Ry:18） Turning:（▽:▽▽/Rmax:25S/Ry:25） Turning:（▽:▽/Rmax:35S/Ry:35） Turning:（▽:▽/Rmax:50S/Ry:50） Turning:（▽:▽/Rmax:100S...
Purpose: Confirm roughness of finish and work, Confirm roughness of finish and work, Main Part Dimension (mm): [Y]82x47x2.8, Dimension (mm): 21x11 (standard piece), Specification: 0.8 0.8-1.6-3.2-6.3-12.5-25 6.3-12.5-25-50-100 1.6-3.2-6.3-12.5-25-50 1.6-3.2-6.3-12.5-25-50
Main Part Dimension (mm): 182x47x2.8, 182x47x2.8, Dimension (mm): Standard piece: 25 x 23, Specification: Gas cutting surface A (mm): 0.10 / 0.12 / 0.16 / 0.25 / 0.60, Application: Roughness of finish, roughness confirmation etc. during work