Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
10th Edition
ISBN: 9780073398204
Author: Richard G Budynas, Keith J Nisbett
Publisher: McGraw-Hill Education
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Chapter 15, Problem 6P
To determine
The power rating for gear-set based bending strength.
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A 57-tooth spur gear is in mesh with a 23-tooth pinion. The gearset transmits 125 hp at 1000 pinion rpm. Size the spur gears for a bending failure safety factor of at least 2 assuming a steady torque, 25∘ pressure angle, full-depth teeth, Qν = 9, an AISI 4140 steel pinion, and a class 40 cast iron gear.
Part A
Find the appropriate standard diametral pitch for the gearset.
Part B
Find the minimum required face width of the gears needed to satisfy the safety requirements
Q4
An uncrowned straight-bevel pinion has 22 teeth, a module of 4.5 mm, and a transmission accuracy
number of 8. The pinion is made of Nitralloy 135 M Grade 2 steel having core and case hardnesses of
Brinell of 224. The gear is made of carburized and case hardened Grade 1 steel, both having core and
case hardnesses of 280 Brinell The pinion drives the 28-tooth bevel gear. The shaft angle is 90°, the
pinion speed is 1524 rev/min, the face width is 36 mm, and the normal pressure angle is 20°. Both
gears have an outboard mounting. Find the power rating based on AGMA bending and pitting
resistance if the life goal is 109 revolutions of the pinion at 0.9999 reliability.Use Ko = 1.25; SF = 2
and SH = 1.5.
A pair of iron cast gears connecting two shafts at the Angle of the elbow. The diameter of the pinion pitch and the gear is 80 mm and 100 mm. The shape of the gear gear was 14 restriction form. The static voltage allowed for both gear is 55 mpa. If the door transports to 2.95 kw power at the turn of 1200 RPM, identify the module and the number of teeth on each gear from the Angle of power and check the design from the Angle of the tear. Take the surface durability limit is 630 mpa and the modulus elasticity to iron cast is 84 kn /mm2.
Chapter 15 Solutions
Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
Ch. 15 - An uncrowned straight-bevel pinion has 20 teeth, a...Ch. 15 - For the gearset and conditions of Prob. 15-1, find...Ch. 15 - An uncrowned straight-bevel pinion has 30 teeth, a...Ch. 15 - For the gearset and conditions of Prob. 15-3, find...Ch. 15 - An uncrowned straight-bevel pinion has 22 teeth, a...Ch. 15 - Prob. 6PCh. 15 - In straight-bevel gearing, there are some analogs...Ch. 15 - Refer to your solution to Probs. 15-1 and 15-2. If...Ch. 15 - Prob. 9PCh. 15 - Prob. 10P
Ch. 15 - Apply the relations of Prob. 15-7 to Ex. 15-1 and...Ch. 15 - Prob. 14PCh. 15 - 15-15 to 15-22 As in Ex. 15-4, design a...Ch. 15 - 15-15 to 1 5-22 As in Ex. 154, design a...Ch. 15 - 15-15 to 15-22 As in Ex. 15-4, design a...Ch. 15 - 15-15 to 15-22 As in Ex. 15-4, design a...Ch. 15 - 15-15 to 15-22 As in Ex. 15-4, design a...Ch. 15 - 15-15 to 15-22 As in Ex. 15-4, design a...Ch. 15 - 15-15 to 15-22 As in Ex. 15-4, design a...Ch. 15 - Prob. 22P
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- An uncrowned straight-bevel pinion has 20 teeth, a diametral pitch of 20 teeth, and a transmission accuracy number of 6. Both the pinion and gear are made of through-hardened steel with a Brinell hardness of 300. The driven gear has 60 teeth. The gear set has a life goal of 10° revolutions of the pinion with a reliability of 0.999. The shaft angle is 900; the pinion speed is 900 rev/min. The face width is 32 mm, and the normal pressure angle is 20°. The pinion is mounted outboard of its bearings, and the gear is straddle-mounted. Based on the AGMA bending strength, what is the power rating of the gear set? Use Ko = 1, SF = 1, and SH = 1. %3Darrow_forwardQ1 Design a 4:1 spur-gear reduction for a 59 kW, three-phase squirrel-cage induction motor running at 1244 rev/min. The load is smooth, providing a reliability of 99.9 % at 109 revolutions of the pinion. Gearing space is meager. Use pinion materials to be Nitralloy 135M, grade 2 steel and nitrided through-hardened grade 1 steel material to keep the gear size small. The gears are heat-treated first then nitrided. Consider temperature factor is 1.1 for 250 0C.arrow_forwardPROBLEM A pair of straight bevel gears drives the vertical drilling machine. The approximate speed reduction is 4:1 with the pinion mounted on the horizontal drive shaft. The drill develops a torque of 495 N-m at 550 rpm. Assume the tooth form to be 20° stub, 24 teeth in the pinion and module of 4. The pinion and gear are made of steel (EP=EG= 215GPA) and have a surface hardness of 250 B.H.N. The tooth form factor of the teeth is 14 ½ and take form factor as y' = 0.335. a)Determine the cone distance b)Determine the face width assuming % of the cone distance c)Determine the formative number of teeth on the pinion d)Determine the tangential force e)Determine the determine permissible tooth load (AGMA Standards) f)Determine the maximum limiting load for wear g)Determine the endurance strength for the teetharrow_forward
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