Application Notes:
 

FZG four-square gear oil test


is the test used in developing industrial gear lubricants to meet equipment manufacturers’ specifications. The FZG test equipment consists of two gear sets, arranged in a four-square configuration, driven by an electric motor. The test gear set is run in the lubricant at gradually increased load stages until failure, which is the point at which a 10 milligram weight loss by the gear set is recorded. Also called Niemann four-square gear oil test.

 

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