To match your requirements in diameter 500 mm, our product range offers three different loading performances for your BULK applications: - L for Light-duty - M for Medium-duty - H for Heavy-duty You have a choice. Therefore, it is important to notice the differences to choose the right type of pulley for the right application based on estimated belt tension (radial load) = T1+T2. The actual radial load MUST be LESS than the max. allowable radial load shown in this catalogue. Be aware of increased belt tensions using multi-ply thick heavy belts and/or larger belt widths. If you do not find the belt tension needed in this diameter, you might have to choose a larger one. L for Light-duty 500L is meant for similar applications as 400M except for the fact that the belt requires a larger pulley diameter. (Motor/gearbox origin from 400M). 500L are typically used in grain storage, cement, steel, fertilizer and heavy mobile crushing & screening applications. As to outer dimensions, 500L cannot replace 500H (Former TM500/TM501). M for Medium-duty Using a solid and robust 3-stage gearbox, 500M provides the necessary torque & belt pull needed for low speeds combined with high power for irregular loadings. (Motor/gearbox origin from 400H). As to outer dimensions, 500M cannot replace 500H (Former TM500/TM501). H for Heavy-duty The construction of 500H is the heaviest of this particular range with internal parts such as gearbox, 0 65 mm shaft, matching bearings etc. are designed for tough, irregular, extreme and brutal working conditions. STANDARD SPECIFICATION of Motorized Pulley • Crowned mild steel 0 500 mm steel shell painted yellow - min. layer of 60 pm • Bolted powder coated cast iron bearing housings and covers, all painted yellow - min. layer of 60 pm • Mild steel shafts • Shaft sealing system - degree of protection IP66/67(EN60034-5) • Cast iron terminal box painted yellow -min. layer of 60 pm • 3-phase induction motors with thermal protector • 3-phase single voltage. Most common voltages available. Please specify! • Motor winding insulation Class F • Dynamically balanced rotor • Two oil plugs each fitted with a magnet to filter the oil • Black painted brackets - KL60 for 500L and 500M available on request • Yellow painted graphite cast iron mounting brackets - 500H only! • Oil change recommended every 20.000 operational hours • Minimum RL Please refer to page 53/59 • Maximum RL - Please inquire! • Non standard RL's available • To be used in horizontal positions ±5 degree only! • Nitrided shaft sleeves Please note: • Special speeds available on request. • Motorized Pulleys for non-horizontal positions available on request • Parallel shell available. Diameter equal to dimension 0 A SEMI-RUST-FREE options TS11 - (500L & 500M) • Painted mild steel shell - min. layer of 120 pm • Stainless steel shafts - AISI 303-4 range • Painted cast iron end housings - min. layer of 120 pm • Regreasable covers with labyrinth grooves and grease nipples in stainless steel - AISI 304 range • Zinc-plated oil plugs • Zinc-plated exterior bolts • Shaft sealing system - degree of protection IP66/67 (EN60034-5) • Painted terminal box - min. thickness layer of 120 pm TS11 - (500H) • Painted mild steel shell - min. layer of 120 pm • Painted cast iron end housings - min. layer of 120 pm • Stainless steel covers with labyrinth grooves - AISI 304 range • Zinc-plated oil plugs - each with magnet • Zinc-plated exterior bolts • Shaft sealing system - degree of protection P66/67 (EN60034-5) • Painted terminal box - min. layer of 120 pm • Nickel plated mounting brackets with labyrinth grooves TS12 • As TS11, but without re-greasable seals. • Covers - standard Please note: • FDA & USDA food grade recognized oil and grease are NOT included in TS11 & TS12, but available on request When ordering, please specify the required voltage, electrical connection and eventual TS-number, options, brackets and idler pulleys. • Environmental considerations: page 77-78 • Technical precautions: pages 81 -92 • Optional extras: page 51 and back cover • Connection Diagrams: page 100.