Machine Elements in Mechanical Design (6th Edition) (What's New in Trades & Technology)
6th Edition
ISBN: 9780134441184
Author: Robert L. Mott, Edward M. Vavrek, Jyhwen Wang
Publisher: PEARSON
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Chapter 11, Problem 3P
To determine
The required key geometry, length, width, and height.
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3 3/8-in. shaft, of AISI C1045 WQT1000, has a pulley keyed to it.
Compute the (a) length of square key, and the
(b) length of flat key
such that a key made of cold finished AISI B1113 has the same yield strength as the shaft does in pure torsion.
A shaft where a hub is mounted has 2 in diameter, transmitting 20 hp power at 750 rpm. Design a square key made of steel for factor of safety (n) =3. Use preferred sizes.
An SAE 1050 Cold drawn steel is to be used for a square or rectangular key. The shaft is made of SAE 4340 OQT400 and the diameter is 2.5 inches. The torque transmitted by shaft is 15,000 lb-in. Design factor, N=2. The hub is made of SAE4340 OQT400and the length of hub is designed to be 3 inches.
Which one of the following square keys can be used for this design?
Note: How do I determine answer if the diameter is between two values?
(a) 0.375 in x 0.375 in
(b) 0.500 in x 0.500 in
(c) 0.625 in x 0.625 in
(d) 0.750 in x 0.750 in
Chapter 11 Solutions
Machine Elements in Mechanical Design (6th Edition) (What's New in Trades & Technology)
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- Use the drawing below to answer the following two questions. a. Determine the equivalent spring stiffness of the following system. Simplify the expression (ie – single common denominator. Your answer should be an expression of just K’s – no numbers). b. If the weight on top is 20 lb and the K1 = K4 = 50 lb/in, K2 = 33 lb/in and K3 = K5 = 25 lb/in, what is the natural frequency of the system?arrow_forwardA steel shaft of 2.5 inch diameter rotates at 500 rev/min and transmits 120 hp through a gear. Select an appropriate square key for the gear, while the key material having yield strength of 60 kpsi. Assume a factor of safety of 2.0.. Draw sketch and show all calculations.arrow_forwardA shaft transmitting 10kW of power at 750 rpm, has a diameter of 20mm. Designa square key made of steel for: factor of safety (n) =2. Use preferred sizes.arrow_forward
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