GDC COLLET CHUCKS / GDC

Product catalog summary

Overview: The document provides technical specifications and usage guidelines for the GDC A type balanced collet holders, designed for high-speed machining applications such as drilling, reaming, and finish end milling. These holders are pre-balanced and ready to use, supporting speeds up to 40,000 RPM.

Specifications: The GDC collet holders are available in various models (GDC 07, GDC 09, GDC 12, GDC 16, GDC 22) and are compatible with different tool holder types (BT30, BT40, BT50, HSK-63-A, HSK-100-A, CAT40, CAT50). Each model has specific clamping torque requirements and spanner sizes, with preset screws available for optional use.

Balancing and Performance: The tool holders incorporate balancing screws to achieve the required balancing grades for high-speed applications, extending the life of cutting tools and improving surface finishes. The maximum imbalance values vary by type, ensuring precision in high-speed operations.

Coolant System: The holders are designed for center-thru coolant feed, supporting a coolant pressure of 870 psi at 8,000 RPM. Different cutter types (FDC-OH and FDC-C) are specified for use with or without oil holes.

Ordering Information: The document provides ordering examples and specifies that collets, spanner wrenches, and preset screws are sold separately. It emphasizes the use of class “AA” collets for optimal performance.

Catalog excerpts

Designed for high speed applications. GDC collet chucks incorporate balancing screws which are adjusted to achieve required balancing grades for high speed applications. Use with compatible balancing machines and NT's FDC collet system. Balanced type GDC A GDC Type Max Imbalance Value BT30 1.0 g mm BT40 2.0 gmm BT50 5.2 gmm HSK-63 -A 2.0 gmm HSK-100 -A 5.2 gmm CAT40 2.0 gmm CAT50 5.2 gmm Cover Ring G D P Nut Guide area Body Preset Screw (Not included) FDC collet Balancing screws Pre baranced holders ready to use straight out of the box. The NT balanced collet holder (GDC) is designed for use in incredibl y high speed (40,000rpm ) applications. Coolant supply Balanced tool holders extends the life of cutting tool and produces better surface finishes. Cutter with oil hole FDC-OH type All 3 types are designed for center-thru coolant feed. R.P.M. 8,000rpm Coolant Pressure 870psi High R.P.M. machinin g for drilling , reaming and finish endmilling. Model no. GDC 07 Preset screw no. HDS-07 Clamping torque 8-11 lbf-ft (89 - 133 lbf-in) 22-26 lbf-ft GDC 09 HDS-09 GDC 12 HDS-12 GDC 16 HDS-16 26 - 30 lbf-ft (310 - 354 lbf-in) 30 - 33 lbf-ft GDC 22 HDS-22 (487 - 531 lbf-in) (266 - 310 lbf-in) (354 - 398 lbf-in) 41 - 44 lbf-ft Spanner Size S-0 Cutter without oil hole FDC - C type R.P.M. 8,000rpm Coolant Pressure 870psi FK0025 FK0030 FK0034 FK0045

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