the black plastic:
Delrin is a crystalline plastic ideal for many industrial wear and mechanical applications. Pieces with exposure to a wet environment are especially appropriate (with little effect on performance or dimensions) with some other common uses including: gears, bearings, bushings, rollers, fittings and electrical insulator parts.
Some benefits to using this unique material include the following:
· Chemical resistance to fuels and solvents
· High fatigue endurance
· It is ESD safe and static dissipative
· High strength and stiffness properties
· Separates itself from other engineering plastics due to its very low water absorption.
whereas very high heat is not something delrin will tolerate for extended periods. it can be heated just not kept that way for a long time.
with people making lower and lower resistance coils, they decided to offer a more thermally resistant plastic to keep the poldiac up to speed so to speak. I was interested in a set for checking out the wear characteristics compared to the delrin more then for subohming with it