VRL Inline High Torque Precision Planetary Gearbox ... VRL series inline speed reducer is a kind of FHT helical gear planetary gearbox .Thread-in mounting method together with high level of precision and torque capacity makes VRL speed reducer high precision(2~5 arcmin backlash class) and good stability.VRL is a round body precision reduction gearbox,its output flange is also round,such design ...