N142121 supersedes older part numbers: N106371

DeWalt N142121 — Dust duct / dust port assembly (genuine DeWalt) designed to restore dust collection on compound mitre saws. The molded, impact‑resistant polymer chute channels sawdust from the blade area into the saw’s extraction outlet, lines up with the factory mounting points for a secure fit, and replaces the older N041726 dust port. Fits DeWalt mitre saw including DWS780, DWS782, DHS790 and many of their type variants (examples: DWS780 Type 1/2/20/21/22, DWS782 Type 20, DHS790‑series).

Simple to swap in during a repair: the internal profile is smoothed to reduce clogging and it seats to the original fixings so you can reconnect the saw’s dust bag or extraction hose and get cutting visibility back quickly. Overall external footprint measures roughly 43 cm wide by about 3.8 cm high.

A practical replacement when you need a genuine DeWalt dust duct to bring a mitre saw back to tidy, safer operation — listed under part N142121. This is one of the common power tool parts used to maintain factory dust collection on these models.