LAP 2 Key Fasteners

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The depth of the keyseat on the shaft can be measured using a(n) __________________.

dial caliper

Work is defined as force times ____________.

distance

The formula for mechanical power efficiency is _______________.

eff = Pout / Pin x 100 (or given %)

In most cases you can more easily monitor the efficiency of a power transmission by measuring the ______________ drawn by the motor.

electric power (current)

Checking to see if the hub has a set screw hole drilled in its side is the _______ step to assembling a shaft and a hub using a key fastener.

first

A(n) __________ key is a tapered square key with a head on it.

gibhead

Current measurements are compared to a(n) _______ supplied by the motor manufacturer to determine the torque of a motor.

graph

A key is a piece of metal that fits snugly between two ________.

grooves

A key fastener consists of up to three parts which are the key, keyseat-shaft, and __________.

keyseat hub

The output of power transmission equipment is always _______ than the power input.

less

A dynamometer is used to ______ a mechanical drive system.

load

A prony break is a device used to apply a ______ to a motor.

load

The torque delivered by a motor can be measured by using a(n) ____________ or a dynamometer.

prony break or torque transducer

On a prony break, torque is computed by multiplying the load times ___________.

radius distance

___________ mechanical power is the rate or speed at which the rotating power transmission system turns a load.

rotary

The length of a keyseat can be measured using a(n) ________.

rule

Cleaning the shaft. keyseat and the hub keyseat with a wire brush is the ________ step to assembling a shaft and a hub using a key fastener.

second

A key stock which is purchased from a supplier has a(n) ___________________.

specific tolerance

The mechanical efficiency of a power transmission can be determined by measuring the shaft _________ and _________ at the input and output.

speed torque

A key is made from ________________ which is cut to the length needed and the burs filed off.

standard stock

A(n) ___________ key is shaped like a half moon.

woodruff


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