Product Description: This instrument is integral instrument that will dry or wet felted wool placed under the hammer surface grooves in the friction, the friction hammer placed above a prescribed weight weights to certain provisions of the stroke speed reciprocating friction surface of the sample, in motion reaches a predetermined number of times, the damage to the specimen surface was observed and bleaching. This instrument applies to leather, textile, ribbon, trademark, cardboard and other materials by foreign objects friction damage and bleaching. Technical parameters: weight Weight: 500g Friction distance: 35 mm friction velocity: 40 ± 1rpm (adjustable) Specimen size: 150 × 20mm felted wool area: 15mm × 15mm Dimensions: 430 × 350 × 410mm (L × W × H) Power connection: 220V 10A standard: EN 344 ISO 11641 QB/T1327. 2