Tend mainspring-winding machines that wind mainsprings into shell.
What does a Mainspring Winder and Oiler do?
Tends semiautomatic mainspring-winding machine that winds mainspring into shell and lubricates bearing surfaces: Opens chuck, inserts arbor, and fits spring assembly over arbor. Depresses pedal that allows winding and oiling mechanism to wind spring around arbor, and oil spring. Places barrel over spring by hand and removes assembly from chuck. May wind mainspring, using hand-operated spring-winding tool. May reverse mainspring to coil spring in direction used in watch and be designated Mainspring-Reverse Winder.