Machine Elements in Mechanical Design 4th. Edition by Robert L. Mott | 9780130618856 | 0130618853 | Holooly

Machine Elements in Mechanical Design [EXP-45119]

113 SOLVED PROBLEMS

Question: 3.EP.8

A 2.50-in-diameter shaft carrying a chain sprocket has one end milled in the form of a square to permit the use of a hand crank. The square is 1.75 in on a side.Compute the maxi-mum shear stress on the .square part of the shaft when a torque of 15 000 lb · in is applied. Also,if the length of the

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Objective Compute the maximum shear stress an...

Question: 16.1

A bearing is to be designed to carry a radial load of 150 lb from a shaft having a minimum acceptable diameter of 1.50 in and rotating at 500 rpm. Design the bearing to operate under boundary-lubrication conditions.

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We will use the design procedure previously outlin...

Question: 5.DE.4

A bracket is made by welding a rectangular bar to a circular rod as shown in Figure 5_20.Design the bar and the rod to carry a static load of 250 lb.

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Objective The design process will be divided ...

Question: 13.EP.2

A bronze bushing is to be installed into a steel sleeve as indicated in Figure 13-6. The bushing has an inside diameter of 2.000 in and a nominal outside diameter of 2.500 in. The steel sleeve has a nominal inside diameter of 2.500 in and an outside diameter of 3.500 in.1. Specify the limits of

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For 1, from Table 13_4, Nominal size range (in...

Question: 14.EP.1

A catalog lists the basic dynamic load rating for a ball bearing to be 7050 lb for a rated life of 1 million rev. What would be the expected L10 life of the bearing if it were subjected to a load of 3500 lb?

Verified Answer:

In Equation (14_1),

\frac{L_{2}}{L_{1}}=\le...

Question: 6.EP.1

A column has a solid circular cross section, 1.25 inches in diameter; it has a length of 4.50 ft and is pinned at both ends. If it is made from AISI 1020 cold-drawn steel, what would be a safe column loading?

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Objective Specify a safe loading for the co...

Question: 6.1

A column has a solid circular cross section, 1.25 inches in diameter; it has a length of 4.50 ft and is pinned at both ends. If it is made from AISI 1020 cold-drawn steel, what would be a safe column loading?

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Objective Specify a safe loading for the col...

Question: 6.EP.4

A column has both ends pinned and has a length of 32 in. It has a circular cross section with a diameter of 0.75 in and an initial crookedness of 0.125 in. The material is AISI 1040 hot-rolled steel. Compute the allowable load for a design factor of 3.

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Objective Specify the allowable load for t...

Question: 9.6

A gear pair is to be designed to transmit 15.0 kilowatts (kW) of power to a large meat grinder in a commercial meat processing plant. The pinion is attached to the shaft of an electric motor rotating at 575 rpm. The gear must operate at 270 to 280 rpm. The gear unit will be enclosed

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The nominal velocity ratio is

VR = 575/275 ...

Question: 19.EP.2

A helical compression spring is to exert a force of 8.0 lb when compressed to a length of 1.75 in. At a length of 1.25 in, the force must be 12.0 lb. The spring will be installed in a machine that cycles slowly, and approximately 200 000 cycles total are expected. The temperature will not exceed

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Solution Method 1 The procedure wo...

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