The Albrecht APC Milling Chuck is a precision clamping chuck that excels at all common machining tasks. The tremendous gripping torque, high accuracy, and simple, safe operation make it an excellent choice for: * Heavy Duty Roughing * Hard Milling * Reaming * Precision Finish Milling * Moldmaking * Tapping * High Speed Cutting * Drilling High Speed Balanced All APC Milling Chucks are dynamically balanced to G25@20,000 rpm for high-speed operation. Safe There is no danger of being burned from heat shrinking equipment Thru-Coolant A central thru-coolant feature is standard on all APC Milling Chucks Simple Operation The APC is easily operated by means of an included hex key. There is no expensive heating equipment to purchase, and there is no down-time waiting for tools to heat up and cool down. Powerful Gripping Torque The APC achieves extremely high gripping torque through the combination of a precision worm gear and a slow collet taper angle. Gripping torque at 1/2" diameter is 200 Nm (1770 in lbs). Sealed Construction The APC incorporates dual seals to protect all internal components from coolant and dirt. Extreme Rigidity APC Milling Chucks provide outstanding rigidity and vibration dampening characteristics, resulting in better part finishes and a significant increase in cutting tool life. Ultra-Precision Accuracy The APC achieves ultra-precision accuracy with runout guaranteed to be 0.00012" TIR or better at 2.5 x D. Large Capacity The various APC models can grip tools from 1/8" to 1-1/4" diameter