What are the harmful effects of backlash error in gears?
Q: interference, determine the number of teeth and stages to produce a speed reduction of 42:1. Sketch…
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Q: A bevel gear has a pitch diameter of 2.500 inches. The transmitted torque is 342 in-Ibs. The…
A: Given data: Pitch diameter, dp=2.5 in; Pressure angle, φ=20°; cone pitch angle, α=41.362°; Also,…
Q: Q9:- It is required to transmit power of 500 kW from a driving shaft which is rotating at 1800 rpm…
A: Question (a) and Question (b) is Solved here. For Other Question, Please post this Question again.
Q: A precision cut gear transmits 25 Hp at a pitch line velocity of 6000 fpm. If the service is…
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Q: Consider a gear train with a pinion (driving gear), an idler gear and an output gear. The pinion…
A: Given: The speed of rotating shaft, N1 = 1200 rpm The power, P = 20 hp The train value, G = 2:1 The…
Q: Q1:- An epicyclic gear train has a sun wheel with 30 teeth and two planet wheels each of 50 teeth,…
A: T1=30T2=50POUT=4 kWω=300 rpm Calculating the Value of T3 T3=2×T2+T1T3=2×50+30T3=100+30T3=130
Q: Q 09. Consider a pair of 30° full depth involute spur gears having 20 and 40 teeth respectively and…
A: Find the addendum of smaller gear.
Q: A worm gear reducer is driven by a 1200 rpm motor. The worm has 3 threads and the gear has 45 teeth.…
A: Answer: (a) Gear diameter is 7.162 inch ; Worm diameter is 1.838 inch ; Worm lead is 1.5 inch. (b)…
Q: A pair of parallel helical gears consists of a 20 teeth pinion and the velocity ratio is 3: 1. The…
A: Given: Number of teeth on the pinion Z1=20teeth Velocity ratio=3:1 Helix angle ψ=15° Normal module…
Q: Two meshing spur gears with 20 pressure angle have a module of 4 mm. The centre distance is 220 mm…
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Q: 2. A spur gear made of bronze drives a mid steel pinion with angular velocity ratio of 3, : 1. The…
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Q: Explain properly 1: What are the stresses which are applied on helical and spur gears? and What are…
A: Gears are the most important components of mechanical power transmission systems. In the subject of…
Q: 6. Two mating spur gears have 40 and 120 teeth respectively. The pinion rotates at 1200 rpm and…
A: Given that, Two spur gear of 40 teeth and 120 teeth Pinion rotates at 1200 rpm Torque is 20 N.m
Q: By integrating a detail analysis on the requirements below: • at least two (2) different combination…
A: Module, m = 1 is assumed for all gears
Q: A spur gear has a module of 5 mm, 60 teeth, and a pressure angle of 20° with full-depth teeth. The…
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Q: A pair of straight bevel gears has a velocity ratio of 2:1. The pitch circle diameter of the pinion…
A: Given Data The pitch circle diameter of the pinion is: dp=80 mm The velocity ratio is: 2:1 The…
Q: What is the pressure angle for gear teeth? Why would some gears have different pressure angles?
A: Solution:
Q: A pair of steel gears have a design life of a million cycles. They have 20° full-depth teeth with a…
A: Pitch diameter , d=NPdd==208=2.5Velocity V=πdn12V=π X 2.5 X 200012V=1308 ft/minVelocity factor for…
Q: Identify different types of teeth which are across a gear - one is known as a spur or 'straight cut'…
A: Solution: To Find: (a) Identify the types of Teeth on the respective gears. (b) Need of respective…
Q: a uniformly loaded conveyor with a required shaft speed of approximately 531 r/min. Use a pinion…
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Q: Two 20° involute spur gears have a module of 12 mm. The addendum is equal to 1.5 module. If the…
A: Given Spur gear involute angle = 20o Module = 12 mm Addendum = 1.5 module Number of gear teeth = 40…
Q: 2) Two mating internal 10-pitch, spur gears have 16 and 86 teeth. Determine the center distance. 3)…
A: Note: - As per the guidelines of Bartleby, only one question is allowed to answer so please submit…
Q: A 70.74 hp motor turning at 2116 rpm is to deliver its power to a worm-gear reducer, whose velocity…
A: Worm gear drives are those gears when motion is to be transmitted between shaft whose axes are…
Q: A pair of 20°, mild-steel gears are to be selected for an application where they need to transfer 5…
A: GIVEN: A pair of 20°, mild-steel gears Which transfer 5 hp, The pinion drives at 1800 rpm the gear…
Q: 2. A spur gear made of bronze drives a mid steel pinion with angular velocity ratio of 3, : 1. The…
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Q: select the minimum quality if the gears pitch line velocity is 30 m/s
A: In gearbox sizing, it’s important to determine the required input speed in rpm and ensure that it…
Q: Consider a gear train with a pinion (driving gear), an idler gear and an output gear. The pinion…
A: Given: The number of teeth on the pinion, Z1 = 20 The number of teeth on idler gear, Z2 = 16 The…
Q: a double threaded worm gear transmits 15 Hp at 1150 rpm. the pitch of the worm is 0.75" and pitch…
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Q: teeth 16, a face width of 36 mm and a pressure A spur gear has a module of 3 mm, number of teeth 16,…
A: As per given question Power=3kw N=20rps Face width =36mm Velocity factor =1.5 Number of teeth =16…
Q: A pair of spur gears with a normal pressure angle of 20°, a module of 3 mm and a face width of 35 mm…
A: Lets d = diameter of pinion Tp = Number of teeth m = module Ft = Tangential load V = tangential…
Q: 2 A pair of 20° involute gears are to be des driving a machine which is to run near as possible to…
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Q: Velocity factor for ordinary cut gears operating at velocity 6 m/s is equal to- (а) 0.5 (с) 0.33 (b)…
A: Given, Operating linear velocity of gears = v = 6 m/s Velocity factor for ordinary cut gears is…
Q: A pair of spur gears with 20° full-depth involute teeth, the pinion shaft is connected to a 10 kW,…
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Q: ratio factor Q for these gears
A: Given D1=100 , D2=400, D3= 100 , D4= 400 Module m = 4mm So, No. of teeth on each gears, m= D/T T…
Q: ral p
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Q: triple thread worm used in a gearset has a pitch diameter of 2.5 and a lead of π/5 in. Which of the…
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Q: 1.Please design a pair of spur gears in the milling machine. It is known that power input is 7.5kW,…
A: Given : P = 7.5 kW N = 1450 rpm u = 2.08 To find : Design pair of spur gears Note : some values are…
Q: A herringbone speed reducer consists of a 26 teeth pinion driving a 104 teeth gear. The gears have a…
A: find: The factor of safety against bending failure and against pitting failure. Given: The number of…
Q: A simple gear train of 30 and 50 teeth for pinion and gear wheel respectively, is used to drive an…
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Q: Two Standard spur gears have a diametral pitch of 10, a pressure angle of 20°, and a velocity ratio…
A: GivenVelocity ratio=3.5:1Pressure angle=20°Pitch diameter=10Centre distance=8.55inch
Q: By employing a pressure angle larger than standard, it is possible to use fewer pinion teeth, and…
A: Given , A rack and pinion gear arrangement to be considered with spur gears No. of teeth on…
Q: Q.12 Explain why undercutting is done to avoid interference of an involute teeth. Discuss, briefly,…
A: Solution:: If the gears are generated by involute rack cutters, the interference is automatically…
Q: Arm 5 Arm 4 Arm 1 Bearing iven N2 = 30, N3 = 25, N4 =45, N5 = 40, N6 = 200 %3D W2 = 240 rpm ccw,…
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Q: A pair of bevel gears, with 20° pressure angle, consists of a 20 teeth pinion meshing with a 30…
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Q: Given that the tooth geometry factor is 0.32 and the combined effect of dynamic load and allied…
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Q: in spur gears having involute teeth, the product of circular pitch and diametral pitch is?
A: Given Data⇒ Spur gear with involute teeth
Q: State and prove law of gear tooth action for constant velocity ratio and show how the involute teeth…
A: Law of gear tooth- "According to law of gear tooth, the velocity ratio of a meshed gear must remain…
What are the harmful effects of backlash error in gears?
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- Describe gear and classification of gears and detail also explain terms used in gears?Question 1 What is the difference between bending stress and pitting resistance? And why is it important to verify the bending stress of the standard selected gearsQuestion 1 A simple gear train of 30 and 50 teeth for pinion and gear wheel respectively, is used to drive an electric wheelchair at a velocity that is double the maximum velocity of slip. The pinion has an equal addendum as the gear wheel, a module of 3 mm, and a pressure angle of 14.5°. The wheelchair has a maximum velocity of 5 m/s when its pinion rotates at 800 r.p.m. Calculate: 1.1. The magnitude of the velocity of slip of gears in mesh. 1.2. The angular speed of the gear wheel in rad/s. 1.3. The maximum length of a path of the approach in mm. 1.4. The length of a path of a recess in mm. 1.5. The addendum of the gears in mm. 1.6. The contact ratio.
- Another very common mode of failure of gear teeth is that due to surface damage or pitting, which can eventually result in extensive cratering and loss of the load bearing surface of the tooth. Which of the following best describes the causes, and some of the measures that can be taken to prevent this form of failure. a. Maximum compressive stresses occur at the root of the tooth; - Stress concentrations due to cracks in the tooth flank can increase these stresses; - Failure is due to fatigue loading, and is worse because of shock loads: -Asperity to asperity contact, and hence high surface roughness or poor lubrication can make this failure worse; - Surface load capacity can be improved by selecting materials with high surface hardness values, such as carburised steels; - Once pitting has occurred over more than 10 % of the surface, gears are no longer serviceable. b. Maximum tensile stresses occur at the point of contact between the teeth; - Stress concentrations due to pits or small…State law of gearing? What do you understand by the term ‘interference’ as applied to gears?Explain properly 1: What are the stresses which are applied on helical and spur gears? and What are the important considerations which should be considered in designing helical and spur gears?
- A pair of helical gears mounted on parallel shafts have P, = 6, d, - 20°, and b= 4 in. The 32-tooth pinion and 48-tooth gear are made of steel having 400 Bhn and 350 Bhn, respectively. Manufacturing precision corresponds to curve C of Velocity factor chart. Use a mounting factor of 1.6. Center distance is 7.5 in. 1. What helix angle is required? 2. Estimate the horsepower that can be transmitted for 10 pinion revolutions with 99% reliability and a safety factor of 1.5 if the driving motor rotates 1200 rpm and involyes light shock and the driven load involves medium shock. Check for bending fatigue only.6. Two mating spur gears have 40 and 120 teeth respectively. The pinion rotates at 1200 rpm and transmits a torque of 20 N m. The torque transmitted by the gear is (a) 6.6 Nm (6) 20 Nm (c) 40 Nm (d) 60 Nm.The following data relate to two meshing gears: Velocity ratio =1:3;Module: 4mm; Pressure Angle: 20°; Center distance: 200 mm Determine the number of teeth and the base circle radius of the gear wheel.
- A 70.74 hp motor turning at 2116 rpm is to deliver its power to a worm-gear reducer, whose velocity ratio is to be 25. The worm is shell type and has 3 threads; the worm and gear materials are 8 - High-test CI & High-test CI respectively. Provide the details for this pair of gears if the chosen circular pitch is 5/8. Assume Sn= 31,000 psi. For the diameter of the worm, use the proportion as provided by the equation for hell worms on page 437 of the book of FAIRES. Please answer those on the Table.1. Calculate the power that can be transmitted safely by a pair of spur gears with the data given below. Calculate also the bending stresses induced in the two wheels when the pair transmits this power. Number of teeth in the pinion = 20 Number of teeth in the gear = 80 Module = 4 mm Width of teeth = 60 mm Tooth profile = 20° involute Allowable bending strength of the material = 200 MPa, for pinion = 160 MPa, for gear = 400 r.p.m. Speed of the pinion Service factor = 0.8 0.912 0.154- T Lewis form factor %3D 3 Velocity factor 3 + vA gearbox is needed to provide an exact increase in speed, while minimizing the overall gearbox size. The input and output shafts should be in-line. Specify appropriate teeth numbers. The gearbox is required to transmit 18 kW from a shaft rotating at 2650 rpm. The desired output speed is exactly 13250 rpm. For space limitation and standardization reasons a double step-up gearbox is requested. Using the limited selection of gears presented in Tables 6.7 to 6.10, select suitable gears for the gears and pinions 24 2650 rpm Table 6.7 Spur gears: 1.0 module, heavy duty steel 817M40, 655M13, face width 15 mm Outer Boss Bore Part PCD diameter diameter diameter number Teeth (mm) (mm) (mm) (mm) SG1.9 9 SG1-10 10 SG1-11 11 SG1-12 12 10:00 12:00 12 11.00 13.00 13 12.00 14.00 14 12.00 14.00 14 SG1-13 13 1300 15.00 15 6 SG1-14 14 1400 16.00 16 6 15.00 17.00 SG1-15 15 6 SG1-16 16 16.00 18.00 SG1-17 17 17.00 19.00 18 SG1-18 18 18.00 20.00 18 SG1-19 19 19:00 21.00 SG1-20 20 2000 2200 21.00 2300 2200…