The TC20190-SK03 Rot/hamer 20V Replacement Chuck & Gearbox Complete (1–37) Service Kit brings together the critical front-end components that drive your SDS-Plus bits into concrete, brick and stone. When the original chuck, gearbox or housing is worn, noisy or leaking, this genuine kit restores smooth, confident hammer drilling and chiselling performance.

Genuine chuck and gearbox complete kit for TC20190 Rotary Hammer RH500 20V SDS-Plus This kit covers a group of parts identified as items 1–37 on the TC20190 exploded diagram – typically including the SDS-Plus chuck assembly, gearbox housing and key drive components at the nose of the machine.

Renewing these parts together helps ensure proper alignment, lubrication and impact transfer, so your cordless RH500 rotary hammer feels tight, accurate and ready for daily site work.