30Pcs Roughness Comparator Set, Sample Block Ra 0.05-12.5 for Metal Finish Testing, Calibration Set with Visual Inspection Gauges Compatible with 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

• For Surface Roughness Assessment: Designed for quick visual and tactile comparison of machined parts, this exterior roughness comparison test block helps identify Ra values from 0.05 to 12.5 mm for accurate inspection in metalworking environments.
• Comprehensive Sample Set: Includes 30 calibrated sample pieces covering six key machining processes—turning, end milling, flat milling, exterior grinding, external grinding, and polishing—providing a broad reference range for professionals.
• Accurate Comparison Standards: Each roughness test block reproduction is calibrated with both for uAA and metric um Ra values, offering consistent texture, appearance, and feel for precise measurement and inspection gages usage.
• Compact & Portable Design: Wallet-sized at approximately 6 × 3 × 3/8 in and weighing about 14 oz, the set is easy to carry to worksites or labs, keeping the comparison test block samples organized and protected.
• Long Lasting Build: Crafted for repeated handling in industrial settings, the For surface roughness sample block maintains accuracy over time, helping forestall‌ measurement errors during routine or detailed inspections.