Deep Hole Drilling of the Smallest Diameters

Deep hole drills with very small diameters are needed for various sectors in the automotive industry, such as the drilling of fuel injection nozzles, or for medical technology. In order to produce these delicate parts, MAPAL Inc. (Port Huron, MI) has extended their portfolio of deep hole drills with internal cooling for machining centers to include models above one millimeter diameter.

The geometry of these new drills has been specially adapted to the small diameter range. Thanks to a newly designed chip flute and special face geometry, very high feeds and cutting speeds are possible with deep hole drills. The innovative cooling channels make these drills suitable for use with minimum quantity lubrication (MQL). Despite lengths of up to 30xD, the gas/oil mixture is reliably transported to the cutting edges. Instead of a full coating, the new tools are coated only at the head for higher cost-effectiveness.

These new miniature deep hole drills are available in the diameter range from 1.0 mm to 2.9 mm (shank diameter 3 mm) for universal drilling in steel and cast iron machining and drilling depths between 20 and 30xD.

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