SonoCraft III ST-50 Ultrasonic Burnisher

$1,215.00 - $1,990.00
Special Order Item
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SonoCraft III ST-50 works on gold, silver and other soft metals. For more power for harder metals & more difficult applications, see Sonocraft Model ST-60.

Traditionally used to finish metal molds & dies, ultrasonic polishing enables precision finishing in the tiniest areas! SonoCraft uses high-frequency low-amplitude ultrasonic vibration to reach into the tiniest places to clean and burnish — leaving an extremely bright burnished surface.

The ST-50 comes with one burnishing tip and works on softer metals such as gold and silver. It operates in a continuous mode with a constant fast impact governed by a Variable Rheostat dial. Used for burnishing and polishing. There is very little vibration transmitted through the handpiece so it can be used comfortably for long periods of time. Made in Japan.


  • Advanced ultrasonic technology drastically reduces finishing time for increased productivity.
  • Automatic frequency adjustment provides optimal efficiency for excellent finishing results.
  • High output power handles all kinds of metals with ease.


  • power pack 
  • lightweight handpiece
  • tool holder
  • replaceable carbide burnishing tip 
  • on/off foot switch
  • handpiece rest 
  • wrench
  • instructions
Handpiece has BZT electrostrictive tranducer, 79" cord length, M6 screw thread, and measures 4-7/16"L x 11/16" tapering to 5/8" diameter.  Weighs just 7.1 ounces. See "Specifications" tab below for details.
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    Operating Frequency: 24kHz
    Frequency Adjustment: Automatic Feedback
    Operating Frequency: 24KHz
    Power Consumption: 110VA
    Max. Power Output: 30W
    Output Adjustment: Continuously variable
    Electrical: 110V or 220V, 50/60Hz
    Dimensions: 6-7/8"W x 6-7/8"D x 3-3/16"H
    Handpiece Net Weight: 7 oz.
    Net Weight: 2.6 lbs.
    Shipping Weight: 5.4 lbs.