Lesson plan
Cutting ring fitting
Cutting ring fittings are flareless fittings used for connections in fluid applications. They are used worldwide in hydraulic systems. The cutting ring fitting consists of the body, the cutting ring and the nut. On assembly, the two cutting edges of the cutting ring carves into the outer surface of the tube hence ensuring the necessary holding power and sealing for high operating pressures. The tubes have usually metric dimensions. The cutting ring fitting was invented by Ermeto in Germany in the early 1930s. Later Parker Hannifin acquired Ermeto and introduced the fittings to the US. Today they are standardized in ISO 8434.
Article summary
Cutting ring fittings are flareless fittings used for connections in fluid applications. They are used worldwide in hydraulic systems. The cutting ring fitting consists of the body, the cutting ring and the nut. On assembly, the two cutting edges of the cutting ring carves into the outer surface of the tube hence ensuring the necessary holding power and sealing for high operating pressures. The tubes have usually metric dimensions. The cutting ring fitting was invented by Ermeto in Germany in the early 1930s. Later Parker Hannifin acquired Ermeto and introduced the fittings to the US. Today they are standardized in ISO 8434.
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
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Key claims and bibliography are generated from the same tracked claims and sources as the article page.