Cobalt Step Drill, 0.6mm - 2.3mm Diameter, Head 10mm length x .5mm diameter, 3/32” (2.35mm) diameter shank

Primo® Cobalt Steel Step Drills with 10mm head lengths and 15 different head diameters See Product Options for sizes. See chart for Gauge–inch – Metric equivalents.

Use Product Options Menu Above to Select Head Diameter:

Drills are solid cobalt steel and outlast high-speed steel (HSS) bits 15 to 1.

Speed Recommendations:

Drilling speeds should be between 500 and 10,000 rpm. All drilling should be done with a lubricant. The harder the material (metal) to be drilled and the larger the hole size, the slower the drill speed.

Material 1mm (1/16) Drill 2.35mm (3/32) Drill

Aluminum 7,000-8,000 5,000-6,000

Mild Steel 3,000-3500 2,000-3,000

Stainless Steel 1,000-2,000 500-1,000

Brass, Silver, Copper 5,500-6,500 4,000-5,000

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