Horn System DD replaceable drill tips provide locked on security

Geometry and carbide grades/coatings have been formulated to satisfy the requirements of drilling in the full range of materials commonly used in modern manufacturing. The Horn System DD system caters for hole diameters from 10 to 20.5 mm, in increments of 0.1 mm. It supports through tool coolant feed and uses TiN coated cutter bodies, available in lengths that provide capability to drill to depths of 3x, 5x and 7x hole diameter. The interface between the holder and the insert has ample bearing and torque transfer surfaces that lock the insert in position with extreme security. Tip exchange is carried out using a special key and positioning repeatability is such that it can be carried out without the need to remove the tool from the machine or re-setting. Particular attention has been paid to chip forming characteristics in the cutting zone and effective evacuation of waste material from the bore. Where available, through tool coolant is supported but chip flow is further assisted by the low friction TiN coating of the holder. Horn says that experience gained during trials and in beta testing with System DD confirm that its productivity, effective self-centring capability and high standards of bore finish combined with long tip life, more than offset the higher initial cost compared with high quality jobbing-type drills, particularly in tougher materials.