Commercial engineering corporation manufactures drive tensioner. The company provides drive tensioner, positioners and idlers to decrease horsepower loss due to elongation slippage. These drive tensioners run smoother, quieter and deliver maximum horsepower without slippage of drive power. The arrangement for tensioning is available in single adjustment, double adjustment tensioners and angle mounted and flange mounted series positioner to increase equipment life through smooth drive power. The controlled tensioning eliminates shock loading through excessive chain vibration and horsepower loss applied in chain drives timing belt drives, v-belt drives and flat belt drives. The company supplies drive components with needles roller bearing and phosphorous bearing as required and available in ready stock. The chain drives are available in component type ranging from pitch 1/ 4th to 1.5 inches in single, double and multiple stands and for timing belt of classical and htd drives, v-pulleys for z, a and b section.