Re: 62mm Supercharger pulley failures
Originally Posted by
dinasrt
Is our electromagnet clamping force adequate for the added forces? Is there a big difference in the magnetic properties of the different metals used for the different backing plates on the different pulleys?
Different irons and steels have different magnetic qualities, iron is the most attracted to a magnet. Carbon steel alloys are very attracted to magnets. The various stainless steel alloys vary in their attraction to a magnet, from highly attracted to not noticeably attracted, some are attracted prior to hardening and not after.
A malleable iron would be best as a clutch plate as it is ductile, a cast iron is brittle and will crack.
The rivet head being flush or under the surface is really no concern, the clutch plate is not like a brake pad and subject to a lot of wear. Let's face it if there was a lot of wear we would be replacing SC clutch plates quite often so as they do not wear then a flush mounted rivet will not wear either, they get scratched a bit and so would you be if you were practically stationary and then grabbed hold of a rotating SC pulley.
A clutch driving the SC at higher revs sees forces that increase exponentially. A SC driven at higher speeds will fail faster than the ones at OEM speeds. Those are givens and cannot be avoided. Bearings in the SC will fail sooner, if the bearings fail catastrophically then the rotors may touch and will be ruined.
Your replacement SC may be worth more than the car the way prices are going.
Last edited by onehundred80; Sep 28, 2014 at 10:31 PM.