1139 Series Bearingless “All-Media” Rotating Unions for Coolant, MQL, and Air Service

  • Single passage for all media
  • Patented technology operates with closed seals for coolant, as a Pop-OffTM when pressure is removed, and as with a microscopic gap between the seals (“controlled leakage”) with pressurized dry air
  • Non-rotating element has a “stroke” (axial movement) of 0.7-3.0 mm, for reliable sealing even with thermal expansion of spindle and variations in drawbar position
  • Full-flow design has no obstructions to trap chips or debris
  • Balanced mechanical seals made from silicon carbide for long life even under difficult operating conditions
  • Anodized aluminum housing resists corrosion