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 2, Problem 41P
To determine
To Discuss: The uses of group D tool steels.
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Students have asked these similar questions
The gears shown in the figure have a diametral pitch of 2 teeth per inch and a 20° pressure angle.
The pinion rotates at 1800 rev/min clockwise and transmits 200 hp through the idler pair to gear
5 on shaft c. What forces do gears 3 and 4 transmit to the idler shaft?
TS
I
y
18T
32T
This
a
12
x
18T
C
48T
5
Question 1. Draw 3 teeth for the following pinion and gear respectively. The teeth
should be drawn near the pressure line so that the teeth from the pinion should
mesh those of the gear. Drawing scale (1:1). Either a precise hand drawing or
CAD drawing is acceptable. Draw all the trajectories of the involute lines and the
circles.
Specification: 18tooth pinion and 30tooth gear. Diameter pitch=P=6 teeth /inch.
Pressure angle:20°, 1/P for addendum (a) and 1.25/P for dedendum (b). For fillet,
c=b-a.
5. The figure shows a gear train. There is no friction at the bearings except for the gear tooth forces.
The material of the milled gears is steel having a Brinell hardness of 170. The input shaft speed (n2)
is 800 rpm. The face width and the contact angle for all gears are 1 in and 20° respectively. In this
gear set, the endurance limit (Se) is 15 kpsi and nd (design factor) is 2.
(a) Find the revolution speed of gear 5.
(b) Determine whether each gear satisfies the design factor of 2.0 for bending fatigue.
(c) Determine whether each gear satisfies the design factor of 2.0 for surface fatigue (contact stress).
(d) According to the computation results of the questions (b) and (c), explain the possible failure
mechanisms for each gear.
N4=28
800rpm
N₁=43
N5=34
N₂=14
P(diameteral pitch)=8 for all gears
Coupled to 2.5hp motor
Chapter 2 Solutions
Machine Elements in Mechanical Design (6th Edition) (What's New in Trades & Technology)
Ch. 2 - Define ultimate tensile strength.Ch. 2 - Define yield point.Ch. 2 - Define yield strength and tell how it is measured.Ch. 2 - What types of materials would have a yield point?Ch. 2 - What is the difference between proportional limit...Ch. 2 - Define Hooke’s law.Ch. 2 - What property of a material is a measure of its...Ch. 2 - What property of a material is a measure of its...Ch. 2 - If a material is reported to have a percent...Ch. 2 - Define Poisson’s ratio.
Ch. 2 - If a material has a tensile modulus of elasticity...Ch. 2 - A material is reported to have a Brinell hardness...Ch. 2 - A steel is reported to have a Brinell hardness of...Ch. 2 - For Problems 14 17, describe what is wrong with...Ch. 2 - For Problems 14 17, describe what is wrong with...Ch. 2 - For Problems 14 17, describe what is wrong with...Ch. 2 - For Problems 14 17, describe what is wrong with...Ch. 2 - Name two tests used to measure impact energy.Ch. 2 - Prob. 19PCh. 2 - Prob. 20PCh. 2 - Prob. 21PCh. 2 - What is the typical carbon content of a low-carbon...Ch. 2 - How much carbon does a bearing steel typically...Ch. 2 - What is the main difference between SAE 1213 steel...Ch. 2 - Name four materials that are commonly used for...Ch. 2 - Name four materials that are typically used for...Ch. 2 - Describe the properties desirable for the auger...Ch. 2 - Prob. 28PCh. 2 - Appendix 3If a shovel blade is made from SAE 1040...Ch. 2 - Describe the differences between through-hardening...Ch. 2 - Describe the process of induction hardening.Ch. 2 - Prob. 32PCh. 2 - Prob. 33PCh. 2 - Prob. 34PCh. 2 - Prob. 35PCh. 2 - Prob. 36PCh. 2 - Name three types of cast iron.Ch. 2 - Prob. 38PCh. 2 - Describe the process of making parts from powdered...Ch. 2 - Prob. 40PCh. 2 - Prob. 41PCh. 2 - Prob. 42PCh. 2 - Prob. 43PCh. 2 - Prob. 44PCh. 2 - Prob. 45PCh. 2 - Prob. 46PCh. 2 - Name three typical uses for titanium alloys.Ch. 2 - Prob. 48PCh. 2 - Prob. 49PCh. 2 - Prob. 50PCh. 2 - Describe the difference between thermosetting...Ch. 2 - Suggest a suitable plastic material for each of...Ch. 2 - Name eight factors over which the designer has...Ch. 2 - Define the term composite.Ch. 2 - Prob. 55PCh. 2 - Name four types of reinforcement fibers used for...Ch. 2 - Prob. 57PCh. 2 - Prob. 58PCh. 2 - Prob. 59PCh. 2 - For what applications are sheet-molding compounds...Ch. 2 - Prob. 61PCh. 2 - Prob. 62PCh. 2 - Prob. 63PCh. 2 - Prob. 64PCh. 2 - Prob. 65PCh. 2 - Prob. 66PCh. 2 - Prob. 67PCh. 2 - Prob. 68PCh. 2 - Discuss the advantages of composite materials...Ch. 2 - Prob. 70PCh. 2 - Prob. 71PCh. 2 - Prob. 72PCh. 2 - Prob. 73PCh. 2 - Describe the general construction of a composite...Ch. 2 - Prob. 75PCh. 2 - Prob. 76PCh. 2 - Prob. 77PCh. 2 - Prob. 78PCh. 2 - Prob. 79PCh. 2 - Prob. 80PCh. 2 - Prob. 81PCh. 2 - Prob. 82PCh. 2 - Prob. 83PCh. 2 - Problems 8290. For composites made with the given...Ch. 2 - Prob. 85PCh. 2 - Prob. 86PCh. 2 - Prob. 87PCh. 2 - Prob. 88PCh. 2 - Prob. 89PCh. 2 - Prob. 90PCh. 2 - Prob. 91PCh. 2 - Prob. 92PCh. 2 - Prob. 93PCh. 2 - Problems 94 96. For the given specification for a...Ch. 2 - Prob. 95PCh. 2 - Prob. 96PCh. 2 - Prob. 97PCh. 2 - Prob. 98PCh. 2 - Prob. 99PCh. 2 - Describe how CNTs are used in a CMNC and what...Ch. 2 - Prob. 1SPCh. 2 - Prob. 2SPCh. 2 - Prob. 3SPCh. 2 - Prob. 4SPCh. 2 - Prob. 5SPCh. 2 - Prob. 6SPCh. 2 - Name three U.S. organizations whose names are...Ch. 2 - Prob. 8SPCh. 2 - A U.S. designer specifies SAE 4140 steel for a...Ch. 2 - Prob. 10SPCh. 2 - Prob. 11SPCh. 2 - Prob. 12SPCh. 2 - Prob. 13SPCh. 2 - Prob. 14SPCh. 2 - Prob. 15SPCh. 2 - Prob. 16SPCh. 2 - Prob. 17SPCh. 2 - Prob. 18SPCh. 2 - Prob. 19SPCh. 2 - Prob. 20SPCh. 2 - Prob. 21SPCh. 2 - Prob. 22SPCh. 2 - Prob. 23SPCh. 2 - Prob. 24SPCh. 2 - Prob. 25SPCh. 2 - Prob. 26SPCh. 2 - Prob. 27SPCh. 2 - Prob. 28SPCh. 2 - Prob. 29SPCh. 2 - Prob. 30SPCh. 2 - Prob. 31SPCh. 2 - Prob. 32SPCh. 2 - Prob. 33SPCh. 2 - Prob. 34SPCh. 2 - List the six general classifications of materials...Ch. 2 - Prob. 36SPCh. 2 - Prob. 37SPCh. 2 - Prob. 38SPCh. 2 - Prob. 39SPCh. 2 - Prob. 40SP
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