There are many benefits to Gear Grinding, the process improves it's elemental geometry, which leads to lower gear noise and increase lead contact which improves contact action. The results is a longer and more efficient gear set. Heat treating distort gears, the distortion may decrease the quality and performance level of the gears, the run out and un uniform nature of heat treating is different from gear to gear and worsen in helical gear manufacturing due to the lead unwind. The process of Gear grinding normalises the manufacturing process, in fact it improves the quality to a pre-heat level, pending on equipment technology it can improve to several qualities higher.