Precision ER16 collet chuck designed for clamping drills, wire taps, milling cutters, reamers, and other cutting tools. Features elastic shrinkage mechanism for wide application range and excellent gripping performance.

• Material: SUJ2 high carbon bearing steel
• Hardness: HRC46°
• Surface roughness: Rz2.5
• Strict honing processing on inner holes
• Concentricity according to DIN 6499 standard

Available in three precision grades to meet different application requirements:

• S Grade: 0.015mm concentricity
• A Grade: 0.01mm concentricity
• UP Grade: 0.005mm concentricity (recommended for use with HSP nuts for better stability)

• Gripping drills, taps, milling cutters, and reamers
• Elastic contraction function for wide application range
• Rich variability for different machining requirements

AUTOFOR Company, a global leader in precision cutting technology, acquired a domestic drilling chuck manufacturer in December 2018, strengthening their position in the high-precision industry. Since 2019, their GPDC brand high-precision drill chucks have achieved global recognition.

AUTOFOR holds over 10 invention patents, 600 formulations, and 30,000 specifications. Their resin grinding wheels achieve 0.125mm thickness, setting world records for thinness, with all products certified environmentally friendly by SGS.

AUTOFOR Company specializes in precision cutting technology as craftsman enterprise, industry standard setter, and developer of precision equipment. They offer custom solutions for cutting fluids and special fixtures, committed to excellence in precision cutting technology for generations.