A guide to rotors: different types of rotors can change the way an automobile shredder processes material. (Shredder Focus).The choices made by a company operating an auto shredding shred n. 1. A long irregular strip that is cut or torn off. 2. A small amount; a particle: not a shred of evidence. tr.v. plant are numerous. Not only are there several different companies competing to sell their brand of shredder, but even once a brand choice is made, there are several further considerations. The more obvious ones include the size of the rotor rotor: see generator; motor, electric. and shredder housing, which types of hammers and grates to use, whether to run a damp, wet or dry shredding plant, and how much downstream sorting equipment to include as part of the overall system. The rotor itself can also come in different varieties. Engineers and sales professionals at Lynxs Shredder Corp., Tulsa, Okla., created a "Shredder Selection Rotor Guide" to help customers understand the different rotor configurations and how they differ. Following are portions of the text of that guide. TOTALLY ENCLOSED en·close also in·close tr.v. en·closed, en·clos·ing, en·clos·es 1. To surround on all sides; close in. 2. To fence in so as to prevent common use: enclosed the pasture. BARREL ROTOR PROS: * Discs of rotor are never exposed to scrap resulting in longer service life * Minimum life expectancy Life Expectancy 1. The age until which a person is expected to live. 2. The remaining number of years an individual is expected to live, based on IRS issued life expectancy tables. of rotor is one million tons * Highest inertia inertia (ĭnûr`shə), in physics, the resistance of a body to any alteration in its state of motion, i.e., the resistance of a body at rest to being set in motion or of a body in motion to any change of speed or change in direction of of all rotor designs since the major mass of the rotor is at the perimeter * Better for light scrap such as cars and white goods CONS: * Not necessarily as good for number one scrap * Does not work in some shredder models due to their anvil anvil Iron block on which metal is placed for shaping, originally by hand with a hammer. The blacksmith's anvil is usually of wrought iron (sometimes of cast iron), with a smooth working surface of hardened steel. location DISC ROTOR "WELDED" (HARD-FACED) PROS: * Moderate cost * Highly resistant to breakage * Very good for "all-around" or mixed variety of scrap feed CONS: * Higher maintenance costs per ton * Does not work in some shredder models due to their anvil location DISC ROTOR/"NO-WELD" PROS: * Resistant to breakage * Very good for "all-around" or mixed variety of scrap feed * Lower maintenance CONS: * High wear means very short life expectancy (100,000 tons) * Can have the highest cost per ton processed ECONOMY "DO-IT-YOURSELF" ROTOR PROS: * Lowest cost of all rotors * After end of disc life is reached, the discs are simply replaced on site with "wear part" discs * Reusable re·use tr.v. re·used, re·us·ing, re·us·es To use again, especially after salvaging or special treatment or processing. re·us shaft offers good value for the money SPIDER spider, organism, mostly terrestrial, of the class Arachnida, order Araneae, with four pairs of legs and a two-part body consisting of a cephalothorax, or prosoma, and an unsegmented abdomen, or opisthosoma. ROTOR PROS: * Good life expectancy of up to 500,000 tons * Good auto shredder rotor * Best aluminum shredder rotor * Highest production rate for light scrap CONS: * Lowest inertia * Hammer set ranges from 12 to 34 hammers, depending on size of rotor * Lower resistance to breakage * Jams more easily The information in this story was edited from a guide produced by Lynxs Shredder Corp., Tulsa, Okla. |
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