Use straight angled sides for generating spur and helical gears of maximum accuracy on gear hobbing machines. Hobs are generally supplied with bore keyway. However hobs with end drive slot can also be supplied on request. Single and multi start hobs are designed to suit specific customer’s requirement for pre-shaving & pre-grinding gears with profile features like protuberance & semi-topping. Normally accuracy classes are ‘A’, ‘B’ & ‘C’ as per DIN 3968.