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Industrial Belt and Drive Preventive Maintenance - 68 Pages

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Industrial Belt and Drive Preventive Maintenance

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Industrial Belt and Drive Preventive Maintenance For a long and trouble-free service life

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High performance and comprehensive product range Throughout the years, the Gates Corporation has played a key role in the creation and development of high quality belts. Gates’continuous product development has resulted in a comprehensive programme of V-belts, synchronous belts, tensioners, pulleys, flexible couplings and complete drive systems covering a multitude of applications. Typical examples are V-belts such as Predator®, Quad-Power® III, Super HC® MN, Hi-Power®, Polyflex® JB™ and Micro-V®. The latest innovations in Gates' synchronous belt range are Poly Chain® GT Carbon™, the most...

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IV. Drive shutdown and thorough inspection XII. Troubleshooting methods and tools Gates cost saving programme The Gates cost saving programme includes plant surveys to evaluate current belt drive efficiencies and the calculation of concrete cost saving opportunities for a specific drive. For more information on this subject, see page 58. On page 61 you will find an inquiry sheet for an expertise of your machine park. XIII. Belt storage i

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I. Introduction 1. Why preventive maintenance? When compared to chain drives (with constant lubrication problems), or gear drives (with mechanical problems and high costs), belt drives are the most cost-effective and reliable means of power transmission. This reliability can however only be obtained when belts and drives are properly maintained. The potential for long service life is built into every Gates belt. When coupled to a regular maintenance programme, your belts and drives will run relatively trouble-free for a long period of time. Always inspect belts and drives before they fail....

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II. A safe working environment It is common sense to establish a safe working environment in and around your belt drives. Besides making maintenance easier, the following precautions will ensure safety for the operator. Always have trained personnel working on your belt drives. No loose or bulky clothing. 2. Always turn equipment off Turn off the power to the drive before you start working, even if you are going for a brief inspection. Lock the control box and tag it with a warning sign “Down for maintenance. Do not turn power on.” Keep the key in your pocket. For added safety, and if...

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III. Preventive “routine” maintenance Maintenance has two aspects: shorter, regular preventive inspections and thorough inspections with a longer period of machine shutdown. This section deals with the first type of routine inspection. 1. Simple drive inspection A good way to begin preventive maintenance is making periodic drive inspection a normal part of your maintenance rounds. Look and listen Look and listen for any unusual vibration or sound while observing the guarded drive in operation. A well-designed and maintained drive will operate smoothly and quietly. Guard inspection Inspect...

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IV. Drive shutdown and thorough inspection Belt drives regularly require a thorough inspection. By following the list below, you can maintain a drive efficiently, safely and with very little effort. When properly maintained and used under normal conditions, a well-designed industrial belt drive is capable of operating for several years. Preventive maintenance checklist 1. Turn off power to the drive. Lock the control box and tag it with a warning sign “Down for maintenance. Do not turn power on.” 2. Place all machine components in a safe (neutral) position. 3. Remove and inspect guard....

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IV. Drive shutdown and thorough inspection When rotating drives by hand to ensure correct tracking of the belt, care must be taken not to trap fingers between the belt and pulley. Rotation of large synchronous drives by pulling on the belt is particularly hazardous where entrapment of fingers between pulley flanges and the belt can result in immediate amputation of the finger(s). Use a straight edge to check pulley alignment. LASER AT-1 laser alignment device 3. Pulley inspection If belts have been removed from the drive, check pulleys for unusual wear or obvious signs of damage. Wear is...

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IV. Drive shutdown and thorough inspection 6. Check belt tension The final step is to check belt tension, and, if necessary, retension the belt. Note that retensioning is not recommended for synchronous belts. If too little tension is applied, V-belts may slip or synchronous belts may jump teeth. The correct tension is the lowest tension at which the belts will transmit power when the drive is at full load. The general procedure to check belt tension is as follows. A. Measure at the centre of the span (t) the force required to deflect the belt on the drive 2 mm per 100 mm span length...

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IV. Drive shutdown and thorough inspection Single tension tester Conventional tension testers Unlike the sonic tension meter, Gates’ conventional tension testers measure deflection force. The single tension tester measures up to ± 120 N and the double tension tester up to ± 300 N. Both testers consist of a calibrated spring with two scales: one to measure the deflection and another to measure the applied force. The reading of these scales can be done as follows. 1. Measure the span length (t). 2. The calculated deflection should be positioned with the lower ring on the distance scale. The...

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V. belt and pulley installation When the decision has been made to install a belt, either as a replacement or on a new drive, follow these recommendations for proper installation. Also ensure correct pulley mounting and alignment. Pulley gauges make wear detection easier. 1. V-belt installation 8. Take up centre distance on the drive, rotate the drive by hand for a few revolutions until proper tension is obtained on the tension tester. Some long belts may appear to hang unevenly when installed. It is normal for belts within match tolerances to create noticeable differences 2. Remove old...

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