| 摘要 |
PURPOSE:To afford wide usability to the captioned device by horizontally placing a crankshaft on a freely rotatable index table and making freely adjustable, through turn of said table, a slant angle of the axis of a crankshaft to the longitudinal direction of a drill unit. CONSTITUTION:A slant angle of the axis X of a crankshaft W to the longitudinal direction of a drill unit is freely adjusted by turn of an index table. Therefore, even for a crankshaft with different interval between a crank pin Wa and a crank journal Wb, an oil hole (a) can be drilled with a slant angle corresponding to said interval. Thus, oil hole processing for different kinds of crankshafts can be performed. |
