Pneumatic Chuck for Milling Machine

Model : AP-138

  • Clamping and Std. spring pull force : 180 kgs
  • W/O blowing holes for surface cleaning and center oiling function
  • W/O any positioning blocks
  • Positioning repetition accuracy of static state : 2μm
  • Air pressure clamping force : 500kgs
  • Min. Air pressure : 6kg/cm²
  • Weight : 4.8kgs
  • Material SUS420J2, 52 HRC
  • can be suit for Erowa System or 3R System under your request.

Chuck Size (With P-24 positioning blocks)

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Pneumatic Chuck Diagram


  1. Surface : Stainless steel surface keeps its high accuracy, easy to maintain and has blowing function for clean.
  2. Positioning blocks : Positioning blocks are replacable and custom made is available for various of special workpieces machining.
  3. Connecting structure : Patented piston connecting structure allows bigger deviation.
  4. O-ring : High-quality seals, normal life expectancy is up to 5 years.
  5. Spring : High-quality imported spring. Life expectancy is more than 1.2 million times. 200 times / day = 16 years.
  6. Piston & Cylinder : All piston and cylinder are made of stainless steel. It won’t rust or stuck by moisture.
  • All pneumatic chucks are with boost pressure function and can withstand the clamping force up to 280kgs.
  • Link mechanism coated with special lubrication which won’t be deteriorated by moisture.


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