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Question 1For every revolution of the drivergear calculate the number ofturns of the followerQuestion 3The input gear is connected to a motor that rotates at 3000 rpm.Calculate the two possible velocity ratios.Calculate the two possible output speeds.Question 2The hand drill on theright usesintermeshing bevelgears. Gear "A" has 80teeth while gear "B"has 16.Calculate the numberof turns the drill bit willcomplete if the handleis turned through 2complete rotations?Question 4Complete the gear system, to allow the output shaft to rotate at400 rpm and in the same direction as the input shaft.Indicate the number of teeth on each gear used in your solution.24
Question 1Two gears are used in a gear train. The radiusof the driving gear is 20 cm. The radius of thedriven gear is 10 cm. What is the velocity ratioof the system?If the driving wheel makes 60 revolutions perminute, calculate how many revolutions thedriven wheel makes each minute.Question 3A driving gear has a diameter of 36 cm. Thedriven gear travels at three times the numberof revolutions of the driving gear. Find thediameter of the driven gear.The driving gear in question turns at 100 rpm.Find the speed of rotation (rpm) of the drivengear.Question 2The driving gear of a gear system has 42 teethand the driven gear has 21 teeth. Calculate thevelocity ratio of the gear system.If the driving gear makes 120 revolutions perminute, calculate how many revolutions thedriven gear makes each minute.Question 4Find the velocity ratio of a gear train in whichthe driving gear has a diameter of 32 cm andthe driven gear has a diameter of 8 cm.Question 5A gear system has 60 teeth on the driving gearand 20 teeth on the driven gear. Calculate thevelocity ratio of the gear system.25
Page 4: Pawl and ratchetA ratchet mechanism
Page 8 and 9: Meshed GearsThe diagram below shows
Page 10 and 11: 2) Dividing the diameter of the fol
Page 12 and 13: ExercisesLook at the image on the l
Page 14 and 15: Gear ratios and simple gear trainsW
Page 16 and 17: What is the Gear ratios of these Ge
Page 18 and 19: a 20-tooth follower will turn three
Page 20 and 21: Working out revolutions per minute
Page 22 and 23: Working out revolutions per minute
Page 26 and 27: BicyclesMany machines usegears. A v
Page 28 and 29: Highest gear: (downhill) is the lar
Page 30 and 31: Changing the angle of motionBevel g
Page 32 and 33: Movement of the rack & pinionNote:
Page 34 and 35: The Wheel Although they may seem ve
Page 36 and 37: To understand torque you need to kn
Page 38 and 39: Gear torque rules:Torque is a turni
Page 40 and 41: A simple gear train consists of two
Page 42 and 43: Mechanical AdvantageWhen two gears
Page 44 and 45: Question 1Look at the imageon the l
Page 46 and 47: Answers p 12:46
Page 54 and 55: 1. Bevel Gears:a. Have teeth parall

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