Novendra, A., Refdinal, R. and Le, S.K. 2020. Hardness Analysis of Stone Breaker Chisel Made of Medium Carbon Steel as a Result of Hardening Using Water Cooling Media. Teknomekanik. 3, 1 (May 2020), 22–27. DOI:https://doi.org/10.24036/tm.v3i1.5172.