Carbide Micro Drills Capture Precise Holemaking for Mold and Die Making Requirements

Walter USA has expanded its solid carbide micro drill line with the addition of the DB131 Suprem micro pilot drill sizes and extended the DB133 Supreme micro drill offering to deep drills up to 30 × Dc. These new drills are said to be critical to achieving maximum process reliability combined with minimal dimensional variations and extended tool life in steel, cast iron, nonferrous, super alloys, hard materials and other materials (ISO P, K, N, S, H and O). Stainless steel (ISO M) is added to the list with internal coolant capability.

The use of Walter grades WJ30EL and WJ30ER ensures that the drills provide high wear resistance. In addition, excellent surface finishes can be achieved the drill’s cutting-edge preparation.

According to Walter USA, a new type of flute design reliably evacuates chips, even with the tinniest drills. This capability ensures that hole depths up to 30 × Dc can be easily achieved with the DB133 Supreme micro drill via its 140-degree point angle. The DB131 Supreme micro pilot drill features a 150-degree point angle. Emulsion, oil or minimum quantity lubrication (MQL) can all be used as a coolant with these drills.

The new DB133 drills without internal coolant are available in a diameter range from 0.020-0.116". (0.5-2.95 mm). The diameter range for the micro drills with internal coolant is 0.028-0.116". (0.7-2.95 mm). Length to diameter ratios (L/D) of 5, 8, 12, 16, 20, 25 and 30 × Dc are standard for micro drills with internal coolant and 5 and 8 × Dc without internal coolant. 

This new drill design is effective for applications in the medical, watchmaking, general mechanical engineering, mold and die-making, energy and automotive industries.