The camshaft bearing shell halves K 42601 are precision bearing components designed to support and guide the camshaft of the Adriadiesel/Jugoturbina/Zgoda/Sulzer ZV40/48 engine while allowing smooth rotation under continuous operating loads. Installed as complementary bearing halves around the corresponding camshaft journal, they provide the accurately dimensioned running surface required to maintain correct shaft alignment, distribute bearing loads, and minimize friction between the rotating camshaft and its supporting structure. Because the camshaft is continuously exposed to cyclic forces generated by the valve and fuel-control mechanisms, the condition of its bearings is essential for maintaining stable timing and preventing excessive shaft movement. The K 42601 bearing shell halves therefore require accurate geometry, suitable bearing properties, correct clearances, clean lubrication, and proper installation to achieve reliable service life. During overhaul, the bearing surfaces should be inspected for scoring, wiping, abnormal wear, overheating, contamination, or changes in running clearance, together with the condition of the corresponding camshaft journals. By supporting accurate camshaft rotation and maintaining the required bearing clearances, the K 42601 bearing shell halves contribute to reduced friction, correct camshaft alignment, stable engine timing, and long-term reliability of the ZV40/48 engine.