Finishing

In connection with my feature article on abrasive machining for the May issue, I spoke with Steve Kendjelic, senior applications engineer for Norton/Saint-Gobain Abrasives, Worchester, Mass., about power gear honing. The process is used for ultrafinishing generated gear teeth and is generally performed on a honing machine.

When mass finishing—finishing many parts simultaneously—in a vibratory finishing system, the tendency is to use ceramic or plastic preformed cutting media, said Steven Schneider, technical sales manager at surface finishing company Kramer Industries Inc., Piscataway, N.J. Ceramic tumbling media are made with abrasive filler, much like a grinding wheel. For plastic tumbling media, plastic is mixed with abrasive filler and cast to shape. Ceramic media use aluminum oxide as filler, and plastic media use quartz or silica for cleaner results.

​​​A year ago, a leading aerospace manufacturer approached Sandvik Coromant with a machining challenge. The operation in question was finishing deep titanium pockets, a common feature in structural aircraft components.

Scottie Mahl joined finishing toolmaker Osborn, Richmond, Ind., as director of marketing and product management.