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Manufacturer functional interchange
Boston Gear-published interchange row · Match installed ratio/application · Published size reference Boston 800 size 840 · Foot mounted
Boston Gear publishes 842B/843B for 800 Series size 840 in the foot mounted column of its in-line helical interchange guide. Boston states the 800 Series is designed to be functionally interchangeable with listed drives while requiring verification of ratings and dimensions.
The manufacturer describes the target family as functionally interchangeable with the listed competitor model or configuration.
Boston Gear identifies 842B/843B as the target in this published source row · Match installed ratio/application · Boston 800 size 840 · Foot mounted.
The source still requires ratings, dimensions, ratio, fit, and application conditions to be checked before ordering.
Accessories, bushings, motor mounts, backstops, shafts, screw-conveyor components, and application duty still need to be checked individually.