bearings, couplings, clutches

what does a coupling do?

transmits rotational power over distances e.g. connecting power from a car gearbox to the wheels

what is a shaft?

used to transmit motion and are held together by couplings

flange coupling

when the shafts are in line

advantage of a flange coupling?

allows coupling with no backlash

disadvantage of a flange coupling?

shafts have to be perfectly aligned

what is a flexi coupling?

where shafts are at a slight angle

advantage of a flexi coupling?

allows for misalignment, the coupling breaks to protect the shaft

disadvantage of a flexi coupling?

limit on torque

what is a universal coupling?

used when alignment is more than a few degrees out

advantages of universal coupling?

allows for misalignment, high torque, no backlash

what is a bearing?

used to reduce friction in mechanisms

what is a journal bearing?

support round shafts

what is a split bearing?

in two pieces, for replacement

what is a ball and roller bearing?

used to change action of rubbing to rolling

what is a clutch?

used to connect and disconnect a shaft

what is a dog clutch?

a positive clutch, when engaged they interlock

what is a friction clutch?

can be engaged while shafts still turning

what is a multiplate clutch?

used for large transmission forces

what is a brake?

used to stop or inhibit motion

types of brakes?

electromagnetic breaking / friction breaking