Drill bit set EINHELL COBALT HSS CO 19 pcs — right-hand rotation, for drilling

EINHELL COBALT HSS CO 19 pcs — right-hand rotation, for drilling is a set of precision ground cobalt high-speed steel drill bits designed for right-hand rotation drilling. The bits are made from a 5% cobalt alloy, feature a 135° cross-ground tip angle (DIN 1412 C) and a self-centering geometry. Their bronze colour finish and cylindrical shanks make them suitable for use in compatible drills for workshop, maintenance and industrial tasks where drilling into hard or heat-resistant materials is required.

Advantages

The cobalt alloy and precision grinding provide high heat resistance and wear stability when drilling into difficult-to-work materials such as alloyed steels and stainless steel. The 135° tip angle and cross-ground cutting edges ensure improved centring and longer tool life compared with standard HSS drills. Cylindrical shanks allow straightforward fitting to chucks and the industrial-quality manufacture supports repeated use in demanding applications.

Suitable for

• Drilling steel and alloyed steel
• Working with stainless steel grades A2 and A4
• Drilling cast iron and cast steel
• Creating holes in bronze and plastics
• Workshop maintenance and precision drilling tasks

Key specifications

• Material: High-speed steel with 5% cobalt
• Cutting type: Right-hand rotation, type N
• Tip geometry: 135° cross-ground (self-centering) to DIN 1412 C
• Shank: Cylindrical
• Finish: Bronze-coloured
• Number of pieces: 19
• Intended use: Industrial-quality bits for hard and heat-resistant materials

How to use

Select a drill bit size from the set that matches the required hole diameter and secure it in a compatible drill chuck. Use appropriate drill speed and cutting lubricant when working with hard materials such as stainless steel or cast iron to reduce heat build-up and extend tool life. Apply steady feed pressure and avoid excessive side loads; the 135° self-centering tip helps start holes accurately without the need for pilot drilling in many applications.

Usage recommendations

For best results when drilling stainless steel or alloyed steels, use cutting fluid and moderate speeds. Start with lower feed and increase gradually. Use proper clamping and personal protective equipment. For plastics and softer non-ferrous materials, higher speeds can be used but avoid melting by controlling heat and chip evacuation.