Royal QG-42 Ultra-Precision Quick-Grip
Square Collet, 3/8″ Size – 44672

• Smooth and serrated versions for round-bore models (all others smooth only).
• Industry-leading 0.062″ gripping range covers a wide range of part diameters. Collets are ground to nominal size and have a range of +/- 0.031″.
• Parallel-grip ensures full-length part contact for maximum grip force, rigidity, and accuracy.
• Can be counter-bored for increased part capacity up to 2.62″ see picture for details.
• Quick-ship specials available for custom shapes.
• Can utilize manual and pneumatic changing tools.

QG-42 Capacity:

• Bar Diameter: 1.66″ (42.8mm)
• Slug Diameter: 2.62″ (66.5mm)

Ultra-Precision Quick-Grip Collets

These Extremely Advanced Collets Will Revolutionize Your Workholding

• Industry-leading 0.062″ Gripping Range greater than other quick-change collets on the market and more than 12X that of traditional spring collets.

• Royal Quick-Grip Collets are precision-ground to nominal size, with a gripping range of +/- 0.31″ to handle undersized/oversized stock.
  – Example a 1/2″ collet is ground to 0.500″ dia., and can hold any part ranging in size from 0.469″ 0.531″ dia.

• Ultra-Precision Accuracy 0.0002″ TIR or better guaranteed on round-bores. Total system accuracy (chuck + collet) guaranteed to 0.0004″ or better.

• All Royal Quick-Grip Collets are designed for minimal projection beyond the chuck face ( 0.020″) for optimum rigidity and machine work-zone utilization.

• All models have a smooth gripping surface, but round-bores are also available from stock in a double-serrated version for very aggressive first-op machining.

• Vulcanized rubber between the hardened steel collet segments provides outstanding protection against coolant and chip penetration, and Royal’s advanced vulcanization process carries a lifetime guarantee against failure.

• Collets can be counter-bored for increased capacity.

• S-type master collets available for QG-65 and QG-80 chuck models.

• Royal Quick-Grip Collets are compatible with some other brands of quick-change chucks, but note that the QG-80 and QG-100 models have a six-slot design (for increased gripping torque) that requires the use of a Royal installation tool. Call to verify compatibility.

Specifications:

**Counter-boring collets is a special operation and it is important to note that the maximum counter-bore diameter varies with depth.

See all Royal QG-42 Ultra-Precision Quick-Grip Square Collets