PFERD non-woven mounted flap wheel, 1 pc. (EDP: 46215) // For the best performance, use with a recommended peripheral speed of 2,000-4,000 SFPM. This provides an ideal compromise between stock removal rate, surface quality, thermal load on the worpiece and flap wheel wear. POLINOX mounted flap wheels consist of non-woven polyamide abrasive, into which abrasive grain is integrated. The non-woven abrasive material is arranged in multiple (axial) disc layers. Since the individual non-woven discs are not interconnected, the abrasive surface adapts easily to different workpiece contours, e.g. when working on profiles or pipes. Highly flexible, enabling optimal adjustment to the contour. Cool grinding and low thermal load on the workpiece. The open structure and high flexibility of the non-woven material prevents loading. POLINOX mounted flap wheels PNR. The maximum permitted peripheral speed is 6,300 SFPM. For safety reasons, the maximum permitted rotational speed indicated must never be exceeded. POLINOX non-woven mounted flap wheel PNR dia.2-3/8" x 2 shank dia. 1/4" A280 for fine grinding and finishing.