POWER CHUCKING FIXTURES Using two or more of the HR chucking fixtures allows continuous machining. While a part is being machined in one fixture, the machine operator can quickly unload the other fixture and chuck a new workpiece. Each new workpiece is automatically clamped in the correct position for machining. Because their above-table heights range from less than 2 1/2" to just over 5", the chucking fixture allows more Z-axis travel than bulky vises or fabricated fixtures. Their low-profile shape provides extra freedom in programming z-axis operations and also reduces the risk of the tools colliding with the fixtures during rapid transverse movements. HR Power chucking fixtures have a self-centering , wedge type chucking system operated by double-acting air cylinder incorporated in the chuck body. Workpieces can be gripped by either two (2) opposed jaws or three (3) jaws 120 degrees apart. This design permits clamping of rectangular, square or odd-shaped parts as well as round shapes. Gripping pressure is controllable. Repetitive positioning of workpiece is accurate within .0005" T.I.R for fast and accurate set-up and change-over, top jaws can be "stepped along" the American standard or Acme serrations on master jaws. Fixture A-1 A-15 Max Open Min. Open Jaw Travel A-34 12" Unit 12" 4.22 4.91 2.91 .250 4.19 15" Unit 15" 4.47 6.09 3.59 .250 4.44 18" Unit 18" 4.72 7.59 3.59 .250 4.69 21" Unit 21" 5.03 8.59 4.09 .250 5.00