P T Cibaliung Sumberdaya is one of the mineral mining businesses owned byIndonesian BUMN. The mining activity of PT Cibaliung Sumberdaya uses anunderground mining system with a cut and fill mining method with a productiontarget of 16,000 wmt / month. The actual drill production equipment that wasobtained in the observation was 10869.32 wmt / month which did not meet theproduction target set. Therefore, it is necessary to evaluate the productivity of thedrill tools used. Not achieving production targets is caused by obstacles, bothavoidable obstacles and obstacles that cannot be avoided. These constraints causelow efficiency of drill tools. The actual work efficiency of drill tools in miningactivities is categorized as poor because the value of work efficiency is less than67%. Efforts made to improve the productivity of mechanical equipment areimprovements in work efficiency by eliminating work barriers that can be avoided.After making improvements from the working time, the working time is obtainedafter 228.73 minutes / shift. Availability of equipment after repair: MechanicalAvailability (MA) or mechanical availability, namely 76.25%, Physical Availability(PA) or 85.22% physical availability, Use of Availability (UA) or 56.30% usageavailability, and Effective Utilization (EU) or effective use of 48.36%. After makingrepairs, the drill tool production increased from 10869.32 wmt / month to 15879.60wmt / month.