Exterior Roughness Comparison Sample Block Ra 0.05-12.5 μm, 30-Piece Set for Surfaces Finish Testing with Calibration to AA Values, For S.A.E. Standards

Specifications:The exterior roughness comparator is used to check the smoothness of mechanical workpieces by comparison, while the visual inspection or microscope is used to compare and test the degree of exterior roughness.features:RUG-100: notebook sample block (turning, end milling, flat milling, exterior grinding, external grinding, polishing)The notebook sample block contains standards for the six most important processing for methods among the popular "AA" values. All 30 samples were calibrated with for uAA (arithmetic mean) and metric equivalent um Ra.Sample exterior roughness comparator 30 pieces of composite bag fixing gauges3 Flat grinding: 2,4,8; 7/8 "x 3/8" each; Each type of exterior finish is a true and consistent reproduction, with a true idea of the feel, appearance and texture of machined partsCompare conveniently and quickly; Comply with S.A.E and specificationsOverall wallet size (fully enclosed) L x W x H (inches): 6 x 3 x 3/8 * estimated *; Unit weight: 14 ounces * estimate only*The package includes:A set of 30 sample pieces

• [COMPLETE 30-PIECE COMPARATOR] Complete comparator kit of 30 sample pieces held in a composite bag with fixing gauges, following RUG 100 references for six major machining processes; samples carry calibrated arithmetic mean Ra numbers with metric um equivalents across the Ra 05-12.5 mm span.
• [CONSISTENT FINISH REFERENCE] Each finish type offers a consistent, repeatable reproduction of turned, milled, ground and polished s so comparisons to production parts reflect true feel and visual texture; flat grinding samples come in sizes 2, 4 and 8 with 7/8 x 3/8 inch pieces.
• [SAE-COMPLIANT INSPECTION AID] Intended for visual or microscope comparison to evaluate roughness on machined parts, this tool supports quick decision making in quality control and aligns with SAE specifications for finish assessment.
• [HANDY WALLET FORMAT] Arranged in a protective wallet approximately 6 x 3 x 3/8 inches when closed and weighing an estimated 14 ounces, the layout keeps samples ordered and ready for use in inspection kits, bench checks or mobile toolboxes.
• [SUITED FOR PROFESSIONALS AND EDUCATORS] Recommended for machinists, quality engineers, toolmakers and instructors for setting process targets, training staff and documenting finish characteristics; calibrated Ra references help standardize communication between production and inspection.