American Machinist

Filter system does a fine job. (Casebooks).

ANY SHOP PRODUCING ALUMINUM PARTS IS PAINFULLY aware of the problems that plague machining operations when chips and fines aren't adequately dealt with. This is why Kawasaki Motors Manufacturing Group in Maryville, Mo., incorporated compact chip disposal and coolant-filtration systems on its small machining centers.

The company manufactures and assembles about 200,000 4-cycle (5 to 25-hp) engines yearly for commercial lawnmowers and ATVs. It uses seven Niigata PN40 horizontal high-speed machining centers for cutting die-cast aluminum bevel-gear cases. Kawasaki had to shut down these machines on nearly a daily basis because of clogged coolant lines.

"The Niigata machines run great, but the typical drag-flight-type chip conveyor found on most smaller machining centers like these is simply not designed to remove all the aluminum fines that slip through, given the machine's high metal-removal rates," says Tim Woolery, Kawasaki assistant engineering manager. …

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