Spur Gears o le tau comonly fa'aogaina mea e fa'aoga .E fa'aigoa i nifo e fa'atutusa o foliga o le mea e fa'aogaina .Spur gears e sili mamao atu ona maua, ma e masani lava e sili ona taugofie .The basic descriptive geomety for a spur gear is showin in the firgure below.