Tool e.g. for motor operated hack-saw, has shaft for moving tool back and forth with shaft held by mechanism, which engages to rotational device which engages to gear wheel coupled to motor

摘要

The tool has a shaft for moving a tool (8) back and forth. The shaft is held by mechanism (14), which engages to rotational device. The rotational device engages to a gear wheel (26) coupled to a motor (12). The transmission (10) of the tool has two different speeds within a revolution of gear wheel. The transmission has an idle stroke position and a working stroke position.