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AC-125 Air Collet Closer
Haas offers three types of collet closers for use on HA5C indexing heads. Each of the three designs offers unique benefits you should consider before making a selection. AC125 and AC25 use shop air to drive a piston through a mechanical multiplier to close the collet. This provides greater holding force and reduces operator fatigue, compared to standard manual-handle closers. A simple flick of a lever causes the collet to open or close without effort. On multi-spindle heads, one of these air-actuated closers is required if you plan to use collets, because a standard handle will not fit and is not included.
The AC 125 is our newest design, and provides up to 12,000 lb of draw-tube force with .060'' of travel-allowing part diameter variation of 0.15'' without readjusting the collet. Its design is similar to the AC 25, but uses two pistons, which more than doubles the available draw force. A large internal spring is used for part release. The AC 125 can be tightened from the rear and provides a 5/16'' thru-hole. Its compact size allows it to be used with all models of HA5Cs, and with the use of a small spacer, it can be operated vertically. clamping force pressure is varied by regulating air pressure supplied to the unit (normal operating range 45 to 60 psi). The AC-125 air collet closer can be used with all types of 5C collets, including step collets.
