Foredom A-8005 Primo® Cobalt Steel Step Drill – 0.5 mm

The Foredom A-8005 Primo® Cobalt Steel Step Drill is a premium precision drill bit designed for creating accurate, clean holes in jewelry, metalworking, and other fine fabrication applications. Manufactured from solid cobalt steel, this step drill offers exceptional durability and can last up to 15 times longer than standard high-speed steel (HSS) drill bits, making it an excellent choice for professionals and serious hobbyists.

Featuring a 0.5 mm head diameter and a 10 mm cutting length, the A-8005 delivers precise drilling in precious metals, brass, copper, aluminum, mild steel, and stainless steel when used with the proper lubricant and recommended speeds. Its 3/32" (2.35 mm) shank fits most Foredom handpieces and other compatible rotary tools, making it ideal for jewelry making, model building, electronics, and precision fabrication.

Features & Benefits

• Solid cobalt steel construction for exceptional durability
• Lasts up to 15 times longer than conventional high-speed steel drill bits
• Precision 0.5 mm diameter for fine, accurate holes
• 10 mm cutting length provides excellent drilling depth
• 3/32" (2.35 mm) shank fits most Foredom and compatible rotary handpieces
• Suitable for drilling precious metals, brass, copper, aluminum, mild steel, and stainless steel
• Ideal for jewelry making, metalworking, model making, and precision fabrication
• Best performance achieved when used with cutting lubricant and recommended drilling speeds.

Specifications

• Manufacturer: Foredom
• Model: A-8005
• Series: Primo®
• Product Type: Cobalt Steel Step Drill
• Head Diameter: 0.5 mm
• Cutting Length: 10 mm
• Shank Diameter: 3/32" (2.35 mm)
• Material: Solid Cobalt Steel
• Recommended Speed: 500–10,000 RPM (depending on material)
• Applications: Precision drilling for jewelry, metalworking, electronics, and fabrication.