| 摘要 |
A honing machine for close tolerance sizing of a cylindrical bore in a work piece such as an internal combustion engine block includes a table for supporting the work piece with its cylindrical bore in vertical alignment and a vertical tower structure spanning the table and supporting a trolley for reciprocal movement motor means for driving the honing head being suspended from the trolley by a gimbal mounting. The honing machine is preferably adapted for manual operation, a manual lever and adjustable fulcrum being interconnected together between the vertical tower and trolley for controlling the reciprocating stroke of the honing head, and adjustable stop limiting the downward stroke of the honing head with the weight of the trolley, motor and honing head being counterbalanced to facilitate reciprocating movement of the honing head.
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