A power-suspending system in the Ultramax UM-1200 ultrasonic polisher drops power output to 6 W when the handpiece is not polishing, keeping it cool and extending transducer life. The polisher produces 25,000 cycles/sec at 10 to 35-µ strokes from low to high output. Output power varies with hand pressure for smooth surface finishes.

Paul H. Gesswein & Co. Inc.
Bridgeport, Conn.
gesswein.com