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Calculate the pitch diameter of the worm gear.
1.A double-start worm has a lead of 60 mm. The meshing worm gear has 30 teeth, and has been cut using a hob having…
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Calculate or determine the following, assuming the friction coefficient between worm and gear to be 0.09, and that the motor is operating steadily at full rated power
1.It is proposed to drive an industrial crushing machine, designed to crush out-of-tolerance scrap ceramic bearing liners, with an in-stock 2-hp, 1200-rpm electric motor…
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determine the following, assuming the coefficient of friction between worm and gear to be 0.09: 1 2
1. A worm gear speed reducer has a right-hand triplethreaded worm made of hardened steel, a normal pressure angle of 20, an axial pitch…
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What would be the maximum tensile stress induced in the 0.050-inch-thick steel band during the braking period if the drum were brought to a stop in exactly one revolution?
1.A simple band brake is constructed using a 0.050-inchthick by 2-inch-wide steel band to support the tensile forces. Carbon-graphite material is bonded to the…
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What is the minimum number of friction surfaces required for the clutch to function properly?
1.A disk clutch is being proposed for an industrial application in which the power-input shaft supplies 12 kw steadily at 650 rpm. The patented…
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What should be the outside diameter of this disk brake?
1.A disk brake is to be constructed for use on a highspeed rotor balancing machine. It has been decided that a carbon-graphite friction material…
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determine the proper num-ber of friction interfaces to use for this proposed clutch.
1.For use in a specialized underwater hoisting application, it is being proposed to design a disk clutch with a 20-inch outside diameter. Hard-drawn phosphor…
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Calculate the required torque capacity.
A cone clutch having a cone angle of 10 is to transmit 40 horsepower continuously at a rotational speed of 600 rpm. The contact…
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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…