154 rpm professional planetary gearbox used for floor machine Different ratios, namely 9.8:1,8:1 ... Gearbox is mainly used for floor machine, low speed polishing machine, etc.It can be ... is designed with planetary gears.It works well because the high performance steel gears are used.The shells of the ... , also, there's 2-gear and 3-gear mounting. high quality gearbox for carpet cleaning mchine