Boston Gear Corporation 842B-9K Helical Drive Gearbox

The Boston Gear 842B-9K Helical Drive Gearbox is an inline gear reducer in Boston Gear’s 800 Series, delivering a reduction ratio of 8.91:1 for higher torque at reduced speed in a compact inline footprint. As part of the inline helical drive family, it is designed for straightforward, through-axis power transmission in automated or mechanical systems where space is at a premium. The 842B family encompasses multiple configurations for inline mounting and shaft interfaces, and the -9K suffix identifies a specific variant within that lineup. Exact mounting styles, input/output shaft sizes, and housing options vary by variant; consult the official Boston Gear documentation for the 842B-9K to confirm your exact specifications and compatibility.