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Article: Higher Quality, Reduced Defects Via Remanufactured Grinders.(Brief Article)
- Article from:
- Modern Machine Shop
- Article date:
- May 1, 2000
- Author:
CopyrightCOPYRIGHT 2000 Gardner Publications, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Dave Petersen, product improvement coordinator for Sauer-Sunstrand (Freeport, Illinois), a manufacturer of axial piston pumps and motors for off-highway vehicles--backhoes, tractors and road building equipment--found himself at a crossroads. His manufacturing process--three vintage grinders circa the early 1970s--just wasn't doing the job. The grinders were difficult and time consuming to set up, and holding tight tolerances had increasingly become a "hit or miss" proposition.
"The piston body," Mr. Petersen says, "has to be ground to very precise tolerances. The piston in these wobble plate hydraulic pumps must withstand up to 8,000 psi, so the clearance between ...