Available up to 30 x diameter in sizes ranging from 3 mm to 12 mm, the WTX range of drills can be used on any conventional CNC machine tool equipped with through tool coolant that can run at standard carbide drill feeds and speeds. A typical example is drilling a 6 mm diameter hole to a depth of 180 mm in a 42CrMo4 steel. The cutting data used is 70 m/min at a feedrate of 0.1 mm/rev. The only concession to the increased drill length is the requirement for a pilot hole of the same diameter to be produced to a depth of 3 x diameter. A complimentary range of pilot drills to suit sits alongside the WTX range in WNT’s catalogue.
The drills are designed to operate without the need for a ‘pecking’ cycle, which is a major benefit in helping to reduce overall drilling cycle times. Also helping the smooth operation of the WTX drill is the combination of a four-facet drill point, special cutting edge geometry, 30 degree helix angle, TiAlN coating on the front section of the drill (where it is most needed) and a highly polished finish within the drill flutes that is instrumental in good swarf evacuation.
To keep delivery times to a minimum WTX drills are stocked in 0.5 mm increments up to 8.5 mm diameter. All other sizes can be produced quickly, to order, from an extensive range of blanks that are always held in stock, allowing any diameter of drill to be specified.
