Gears Flashcards

1
Q

What are gears

A

Gears are wheels with teeth which mesh to transmit rotary motion

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2
Q

What is a gear train

A

When two or more gears mesh together

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3
Q

What are 2 types of gears

A

Simple and compound

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4
Q

The centre wheel in 3 wheel gears

A

The idler

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5
Q

The smaller wheel is the

A

Driver

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6
Q

The bigger wheel Is the

A

Driven(load)

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7
Q

What is the formula R

A

R=r ➗ n

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8
Q

What does the rack and pinion do

A

Convert rotary motion into linear motion

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9
Q

What is the rack

A

Straight or flat

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10
Q

What is the pinion

A

Normal round gear

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11
Q

What does the pinion do

A

Rotates and moves the rack in a straight line

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12
Q

Where is the worm wheel usually found

A

On a electric motar

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13
Q

Describe the worm

A

It only has one tooth but is a screw thread

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14
Q

The worm wheel

A

Like a normal gear or spur gear

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15
Q

What do bevel gears do

A

Change the direction of drive in a gear system by 90° 

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16
Q

Bevel gears are what shape

A

Coned shaped

17
Q

Explain a hand drill

A

As the handle of the drill is turned in a vertical direction the bevel gears change the rotation of the chunk to horizontal rotation