Features & Benefits
Replaceable heads in tough micrograin carbide and hardened steel body with high gloss nickel plating for high resistance to wear and corrosion. One body accommodates multiple head sizes with no compromise on tool rigidity and structural integrity.
Titanium aluminium nitride based coating on the drilling heads for high toughness and oxidation stability - enables high speeds and feeds and resists 'built-up edge' which is common when machining softer materials.
The self-centring 140 four facet split point geometry ensures that required thrust force is low. Predrilling/centre drilling is neither necessary nor recommended.
Cylindrical shank with flat for multi-purpose tool holding. Allows accurate clamping for reliable use of internal coolant. Best results are obtained using hydraulic holders such as the Dormer Hydro-Grip; can also be held in ER type and Weldon type toolholders.
Heads are held securely in place by two screws; the perfect fit of body and head serrations transmits the torque evenly and allows for precise and easy assembly. The slow spiral offers optimised flute volume for efficient chip evacuation.
Coolant holes in the drill bodies are aligned perfectly with the replacable heads for efficient delivery of coolant directly to the cutting edge. This not only disperses the heat generated during the hole making process when using high speeds and feeds, but also ensures smooth chip evacuation and long tool life.
Drilling depths of 3 X Diameter, 5 X Diameter shank styles available for the entire range of sizes and 8 X Diameter available on diameters 13.5mm and larger.
Metric head sizes available from 12.0 - 30.5mm diameter and fractional sizes from 15/32" - 13/16" diameter.