1. Positive and negative rotation mechanism Video 1 Video 2   2. Flowmeters   3. Hydraulic motor   4. Sprocket   5. Variable-speed windshield wiper   6. Used in machining milling cutter with equal helical angle

Link:   http://www.mauricelacroix.com

1515 Isocratic HPLC Pump   Link:   http://www.waters.com/waters/nav.htm?cid=1001826

Reels Spinning   Link:   http://international.okumafishing.com/technology.html