Castrol Alphasyn GS 220
Castrol Alphasyn GS 220 is a fully synthetic gear lubricants based on carefully selected polyglycol fluid and containing antioxidant, rust-inhibiting and EP additives of high thermal stability. Castrol Alphasyn GS 220 has inherently superior properties relative to mineral lubricants, therefore these grades are especially suitable for the high temperature lubrication of gears and bearings,particularly in large scale mills and calenders. In worm gears operating with mineral oil at low speeds and high torques, conditions of boundary lubrication tend to promote pitting and consequent rapid wear of bronze worm-wheels. Fatty oils (also known as compounded oils) were found to be effective in reducing pitting, but suffered from rapid oxidation at high running temperatures. Castrol Alphasyn GS 220 is suitable for these applications and also allow extended drain and change intervals. Some manufacturers employ them for fill-for-life lubricants.
