Expulsion device to release cone shaft of borer from reducing sleeve fitted in borer spindle; has guide rod with moving weight or hammer between two abutments at broad wedge end of cotter key

摘要

The device inserts the pointed wedge end (10) in a passage in a reducing sleeve. The borer is driven to force the broad wedge end (11) out of the reducing sleeve. A guide rod (17) at the broad wedge end of the cotter key (9) in the wedge longitudinal direction is provided with a moving weight or hammer (15) between two abutments (19,20).