PFERD Tools Main Catalogue Page 388
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Non-woven tools General information ① Non-woven abrasives ② ③ Non-woven abrasives consist of ① Abrasive grain, ② Polyamide fibres and ③ Synthetic resins. The non-woven fibre structure is impregnated/interspersed with resin and abrasive grain. The even distribution of the abrasive grain within the non-woven mixture guarantees a continuous supply of fresh, sharp abrasive grain during the entire grinding operation. The very loose connections between the individual fibres ensures a high level of flexibility and gives a strong spring-type effect to the non-woven material. It is flexible and supple, and leaves behind a very distinctive surface structure. The satin-finished grinding result is unique and cannot be achieved with other abrasives. Non-woven abrasives are labelled according to the following scheme: PFERD very coarse coarse medium fine very fine Abrasive Aluminium oxide (Al2O3) Silicon carbide (SiC) Even though non-woven abrasive has a completely different structure to coated abrasives, the same abrasive materials are used for both tool groups. Aluminium oxide (Al2O3) is very durable, achieves a top tool life and is very aggressive on hardened steel. The surface generated is characterized by a higher level of shine. When used on aluminium, discolouration is prevented. Silicon carbide (SiC) is even sharper, harder and has better cutting characteristics. It quickly produces a finer, long-lasting slightly matte grinding pattern on the surfaces of many materials. Grit sizes 4 Grit size [mesh] 50–80 80–100 100–180 180–220 220–400 Safety notes ■ For safety reasons, the maximum permitted rotational speed indicated must never be exceeded. ■ Use POLINOX unitized wheels PNER at a recommended cutting speed of 15–35 m/s. ■ Use POLINOX convolute wheels PNK at a recommended cutting speed of 20 m/s. The wound construction of the tool requires that the indicated running direction is strictly observed. Non-compliance with the running direction will lead to destruction of the tool and carries an increased risk of accidents. ■ Use POLINOX mounted/unmounted grinding wheels and cross buffs at a recommended cutting speed of 10–20 m/s. ■ Use POLICLEAN tools at a recommended cutting speed of 15–20 m/s. Page Catalogue 128 4 Wear eye protection! Wear hearing protection! Wear gloves! Wear a dust mask! Follow the safety instructions!
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