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Bevel gears can be used to change the direction of drive in a gear system by 90 degrees. A good example is seen as the main mechanism for a hand drill. As the handle of the drill is turned in a vertical direction, the bevel gears change the rotation of the chuck to a horizontal rotation. |
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A TYPICAL HAND DRILL |
ENLARGED VIEW OF THE BEVEL GEARS OF A HAND DRILL MECHANISM |
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The bevel gears in a hand drill have the added advantage of increasing the speed of rotation of the chuck and this makes it possible to drill a range of materials. |
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With the aid of diagrams and notes explain how a bevel gear is used as part of a mechanism/machine you have seen or used. |
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