LAP 2 Key Fasteners
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
