| 摘要 |
PROBLEM TO BE SOLVED: To provide a metal casting cylinder block 1 in which a main oil-feeding passage 13 to feed lubricant, and a communicating conduit 14 that communicates the main oil-feeding passage 13 with a rotation supporter of a crank journal 2a are provided, in which structure manufacturing is relatively easily achieved with cost reduction, and further chip caused when cutting work of the communicating conduit 14 is performed is prevented from being fed to the rotation supporter of the crank journal 2a. SOLUTION: The communicating conduit 14 is a bored hole to be opened by the cutting work. A resin pipe 15 is inserted into the communicating conduit 14. COPYRIGHT: (C)2011,JPO&INPIT
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