Manufacturing method for ratchet type ring spanner in engine room, involves moving T-shaped milling cutter towards handle until shaft of cutter is stopped by cutout periphery, thus forming cavity in handle

摘要

A cutout (14) is formed on a face of a handle (10), with the cutout communicating with a hole (12) on a head (11) that extends from the handle. A T-shaped milling cutter (52) is moved towards the handle until a shaft of the cutter is stopped by a periphery defining the cutout, thereby forming a cavity (15) in the handle.