Question

38 How metric chasing dial differ 5 points
from British chasing dial? *
O Same as British chasing dial
O One worm wheel and different dial
O One worm wheel and one dial
More than one worm wheel and
O
different dial​

Answer 1

A worm drive is a gear arrangement in which a worm (which is a gear in the form of a screw) meshes with a worm gear (which is similar in appearance to a spur gear). The two elements are also called the worm screw and worm wheel. The terminology is often confused by imprecise use of the term worm gear to refer to the worm, the worm gear, or the worm drive as a unit.

Like other gear arrangements, a worm drive can reduce rotational speed or transmit higher torque. A worm is an example of a screw, one of the six simple machines.

One of the major advantages of worm gear drive units are that they can transfer motion in 90 degrees.

The worm in the worm gear drive may have single or multiple starts. Each full 360 degree turn of a single start worm advances the gear by one tooth. For a multi start worm the gear reduction equals the number of teeth on the gear divided by the number of starts on the worm.

Answer 2

Answer:

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