Feature of spindle collet chuck 1. Repeatability is within 0.001mm 2. Clamping precision is reached to 0.002mm 3. Pneumatic(air) cylinder is integrated: no cylinder or draw tube is needed. 4. Real front-mounting design allows easy installation and operation. 5. Complete through-hole is reserved. No limitation caused by a draw tube or an air feeder. 6. Highly-sealed chuck body helps protect cutting chips, dust or coolant fluid from entering, 100% waterproof and dustproof. 7. Gentle and precise clamping: suitable for fragile parts machining. 8. Low maintenance is required. 9. Oil-mist air lubricated. Very low temperature rising under high RPM. 10. Clamping force is proportional to input air pressure. Easy for adjusting.