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Carbide Micro Drills for Precise Hole Making

Walter has expanded its solid carbide micro drill line with the addition of the DB131 Supreme micro pilot drill sizes and extended the DB133 Supreme micro drill offering to deep drills up to 30 x Dc. These drills are 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), the company reported. 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 superior wear resistance," said a company spokesperson. "In addition, excellent surface finishes are due to the optimal cutting edge preparation on the drill."

A new type of flute design reliably evacuates chips, even with the tiniest drills. This capability helps ensure that hole depths up to 30 x Dc can be achieved with the DB133 Supreme micro drill with its 140° point angle. The DB131 Supreme micro pilot drill features a 150° point angle. Emulsion, oil or minimum quantity lubrication (MQL) can all be used as a coolant with these drills.

The DB133 drills without internal coolant are available in a diameter range from 0.020" to 0.116". (0.5 mm to 2.95 mm). The diameter range for the micro drills with internal coolant is 0.028" to 0.116" (0.7 mm to 2.95 mm). Length to diameter ratios (L/D) of 5, 8, 12, 16, 20, 25 and 30 x Dc are standard for micro drills with internal coolant and 5 and 8 x Dc without internal coolant. This drill design is effective for applications in the medical, watchmaking, general mechanical engineering, mold and die making, energy and automotive industries.

For more information contact:

Walter USA LLC

1510 S Batesville Rd.

Greer, SC 29650


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