Description

Primo Cobalt Steel Step Drills with 10mm head lengths and 15 different head diameters See Product Options for sizes. See chart for Gaugeinch 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

Check Out The Foredom Tools Catalog

makes every attempt to provide accurate information for each item. Actual packaging and/or specifications may be slightly different from the information and picture provided.

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