Sinto America is a full service surface treatment company, providing a full range of shot peening equipment for gear manufacturing using both wheel blast and air blast configurations. We offer gear peening equipment for either manual or automated loaded and unloading, single or multi-station operations. Gear peening up to 200mm in diameter and up to 300mm tooth width for spline peening applications. With over 600 peening machines installed worldwide and multiple peening service locations, Sinto has a peening solution for your needs.


What do you get from shot peening gears with Sinto America peening equipment;

  • Combat gear fatigue failure
  • Increase gear life
  • Allows higher stress levels
  • Enables lighter design
  • Closes porosity
  • Permits use of harder steels by reducing brittleness
  • Prevents galling and fretting


Sinto America, Inc. is the North American group holding company, of Sintokogio, Ltd., Japan. The Sinto group of companies has an international reputation for excellence in the foundry, manufacturing and surface treatment industry. Sinto America focuses on six primary markets – Foundry Mold and Core Making, Sand Processing, Automation, Surface Technologies and Surface Treatment. Sinto also provides contract blasting and precision shot peening services through our National Peening and Technical Metal Finishing divisions and cut wire abrasives through our Frohn North America division. Learn more at: