Drill bit set Makita P-61818, 19 pcs, HSS-Co 5%

Makita P-61818 is a 19-piece drill bit set manufactured from HSS-Co (5% cobalt) alloy, engineered for drilling in hard and heat-resistant metals and alloys. The set covers a range of commonly used diameters for general metalworking, maintenance and repair tasks. Cobalt-enhanced HSS improves hardness and hot hardness, giving the bits better wear resistance and longer life when cutting tougher materials or when operating at higher speeds and temperatures.

Advantages

The HSS-Co (5% cobalt) construction delivers increased durability and resistance to heat-related softening compared with standard high-speed steel. Precision-ground flutes and points provide accurate centring and consistent hole quality. The 19-piece assortment offers a practical selection of diameters for workshop and onsite jobs, reducing the need to change tools frequently. Each bit retains cutting performance under demanding conditions, making the set suitable for repeated use in professional environments.

Suitable for

• Drilling in stainless steel, alloy steels and other hard metals
• General metal fabrication and maintenance work
• Workshop, industrial and professional repair tasks
• Preparing holes for tapping and fastening operations

Key specifications

• Material: High-speed steel with 5% cobalt (HSS-Co)
• Set size: 19 pieces covering standard drilling diameters for metalwork
• Design: Straight shank suitable for standard drill chucks
• Tip: Precision-ground point for improved centring and cutting
• Application temperature: Improved hot hardness for high-speed drilling

How to use

Select the appropriate drill bit diameter for the required hole size and secure it in a compatible drill chuck. For best results in hard metals, use a steady feed rate and avoid excessive side pressure. Apply appropriate cutting fluid or coolant when drilling stainless steel or other heat-sensitive alloys to reduce friction and extend tool life. Start at low speed to establish a centre and then increase speed according to material and bit size, keeping the drill perpendicular to the workpiece.

Usage recommendations

Use a dedicated drill press or a steady hand-held drill with firm clamping for precise holes. Regularly inspect cutting edges and replace bits when worn to maintain hole quality. Store the set in its case to protect bits from corrosion and mechanical damage.