Spring winder
A spring winder ( French 'estrapade') is a watchmaking device that is used in clocks with spring winding to roll up the spring and to fit the spring into the barrel .
properties
A spring winder for mechanical wristwatches usually consists of a handle with a round plate at the end and a mounting plate with holes and a concentrically arranged slotted hoop in the diameters of different barrels. A mandrel is inserted into a hole in the plate, to which the relaxed coil spring is attached. The handle with the mandrel and relaxed spring is inserted into a hole on the spring mounting plate so that the spring lies in the slot of the hoop. The spring is drawn up by turning the handle several times. In wristwatches, the spring holder of a spring winder with a handle has tires between 5 and 11.5 mm.
For larger small watches such as pocket watches and large clocks , a crank with a mandrel and a slotted drum can be used. The spring is attached to the mandrel so that the spring lies in the slot of the drum. The spring is wound up by cranking.
Web links
- Severin Rikl: Spring winder for large clocks . Retrieved January 8, 2014.
- Uhrforum.de: Tool presentation + tutorial: Spring winder for small watches. Retrieved January 8, 2014.
literature
- George Daniels : Watchmaking. Philip Wilson Publishers, London 2011, ISBN 978-0-85667-704-5 .
- Hermann Brinkmann: The watchmaking school, a series of specialist books for vocational training. Wilhelm Knapp Verlag, Düsseldorf 2005, ISBN 3-87420-010-8 .
Individual evidence
- ^ GA Berner: Illustrated specialist encyclopedia of watchmaking (electronic version), keyword 'Federwinder'. Retrieved January 8, 2014.