Rubber, polyamide and PU fabricated industrial power transmission belts are known as synchronous drive belts meant for heavy duty job. These power transmission belts can be used under wide temperature conditions. These ozone protected transmission belts can efficiently resist aging and oil. Based on application type, these industrial belts can be used with reverse tensioning idlers. As part of their design, these industrial power transmission belts have used polyamide fabric as base material. Synthetic rubber backing of these belts prevents their slippage during their high speed operation. These globally approved power transmission belts are maintenance free.