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Reibenrolle

English translation: friction roller

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GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)

German term or phrase:	Reibenrolle
English translation:	friction roller
Entered by:	Lisa Davey

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20:32 Jan 13, 2005

German to English translations [PRO]
Transport / Transportation / Shipping

German term or phrase: Reibenrolle

I am told that this is the part in a dynamo light which can be replaced when worn out.
Anyone know what is it called in English??

Lisa Davey KudoZ activity Questions: 107 (none open) (11 closed without grading) Answers: 123 United Kingdom
Local time: 10:00

friction roller

Explanation:
It is the part of the dynamo that lies (usually with a spring, so as to provide sufficient force) against a moving surface (e.g., the wheel of a bycicle). The moving surface rubs against this roller, making it turn, and this forces the dynamo (with which it is connected through an axis) to also turn, thus generating electricity.

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Note added at 7 mins (2005-01-13 20:39:40 GMT)
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Note that the roller is usually (almost) paralell to the moving surface, or at least at an angle - if it is perpendicular to the surface, then probably it is a friction disc like Christian suggests.