Milling collet holder BT C Straight Collet Chuck

feature: 1.Two kinds of appearance provide: polishing or nickel coating; 2.Surface "environmental protection", special coating surface treatment, improve the hardness and endurance of the surface, cleaness better, accuracy stable, surface more smooth, antirust, feel comfortable, appearance nice. 3.Precision balance G6.3 12000rpm/18000rpm; 4.Chuck shank, lock nut, collet do cryogenic treatment and thermal aging treatment. 5.Inner hole of the shank divide into 6 troughs to prevent the insert remove,increase the grasp force. 6.Ball bearing cage is made of special material, improve the endurance,enhance the grasp force. 7.Grasp force strong,centering accuracy high, suit to heavy cutting.