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What initial tension would be required for proper operation?
1.A flat belt drive system is to be designed for an application in which the input motor shaft speed (driving pulley) is 1725 rpm,…
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If 50 horsepower is to be transmitted at a pulley speed of 320 rpm, what belt width should be specified?
1.A flat belt drive consists of two cast-iron pulleys, each 4 feet in diameter, spaced 15 feet apart, center-to-center. The belt is to be…
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Propose a V-belt drive arrangement that will provide a mean life of about 1 year between belt replacements.
1.A 1725-rpm 5-horsepower high-torque electric motor is to be used to drive a woodworking table saw in a storm-window manufacturing plant. The saw is…
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Based on the knowledge that it takes about five hours to change out the main drive belt, would you consider the replacement interval estimate in (a) to be acceptable?
1. A D-section V-belt is to be used to drive the main power shaft of an agricultural combine (an agricultural combine may be regarded…
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What type of lubrication should be used for this application?
1.A five-strand no. 40 precision roller chain is being proposed to transmit power from a 21-tooth driving sprocket that rotates at 1200 rpm. The…
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estimate the “additional stretch” that would occur in the rope if a 750-lb load were being lowered at the rate of 2 ft/sec, and when the load reaches a point 10 feet below the 7.0-inch drum, a brake is suddenly applied.
1.It is desired to market a small air-driven hoist in which the load is supported on a single line of wire rope and the…
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estimate the number of lifts that could be safely made under the mixed loading described in (b). Again, use a fatigue safety factor of 1.25 in your estimating procedure.
1. An electric hoist, in which the load is supported on two lines, is fitted with a -inch improved plow steel (IPS) wire rope…
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calculate whether the 1.38-inch-diameter journal is properly designed to safely withstand the fatigue loading.
1.The cylindrical bearing journal of a straddle-mounted crankshaft has been tentatively sized based on wear requirements, and it has been found that a diameter…
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Design a suitable crankshaft and construct good engineering sketches of the final design.
1.A straddle-mounted crankshaft for a belt-driven singlecylinder refrigeration compressor is to be designed to meet the following specifications: a. The force on the connecting…
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create a customer service program for a new phone store that will be opening soon.
You have been asked to create a customer service program for a new phone store that will be opening soon. Since this company anticipates…