Why there is wear and tear on the clutch

j1979p

It's a fact that the only time the clutch plate is being worn down is when it is grinding against the flywheel (i.e. the time between when the clutch is fully depressed and when you take your foot off the pedal). However there can also be differing degrees of erosion even if this time is the same for two cars. If the speed of your transmission clutch plate is very different to the speed of the engine flywheel, then more wearing will happen than if you carefully select the right speed before re-engaging the clutch.
So the driver who would wear the clutch the most would be somebody who:

1. changes gears a lot (e.g. urban traffic)
2. tends to very slowly release the clutch rather than doing it more promptly
3. changes gears without properly adjusting their speed

However I can't get my head around exactly how you should adjust your speed when moving up the gears and when moving down. Can somebody enlighten me on this?

j1979p

duplicate, please delete