Helical Gearbox: 1. wide power range 2. high loading capability 3.good combination,durable 4.low noise, high efficiency Helical Gearbox Features:1. high ... reducer, gearbox, gear unit, geared motor, worm gear reducer, aluminum worm gear reducer, helical geared motor, helical-bevel gearbox, helical-worm geared motor, parallel-shaft helical geared motor