Drill bit Forsage 4.4 mm HSS-Co for metal, set of 10 pieces

Forsage 4.4 mm HSS-Co drill bits for metal, set of 10 pieces, are designed for routine metal drilling tasks. Made from high-speed steel alloyed with cobalt, these 4.4 mm bits provide improved heat resistance and extended wear life compared with conventional HSS. The set of ten identical bits is intended for use in hand drills and drill presses to produce clean, precise holes in steel and a variety of other metal alloys during fabrication, repair, and workshop projects.

Advantages

The cobalt alloy in these HSS-Co drill bits increases hardness at elevated temperatures, reducing premature wear during continuous or high-speed drilling. The 4.4 mm diameter offers a balance between hole precision and material removal rate, and the uniform set of ten allows quick replacement when a bit dulls. Compatible with standard drill chucks, these bits provide consistent performance for general metalworking without requiring special holders.

Suitable for

• Drilling holes in steel and iron-based alloys
• Fabrication and assembly tasks in workshops
• Repair and maintenance of machinery and metal parts
• Use with hand drills and drill presses for small- to medium-diameter holes

Key specifications

• Material: high-speed steel with cobalt (HSS-Co)
• Diameter: 4.4 mm
• Quantity: 10 identical drill bits
• Application: metal drilling (steel and metal alloys)
• Shank type: straight round shank suitable for standard chucks

How to use

Select an appropriate cutting speed and feed for the specific metal being drilled and secure the workpiece firmly in a vise or clamp. Install the 4.4 mm HSS-Co bit into a properly tightened drill chuck. Use cutting fluid or lubricant when drilling harder steels to reduce heat buildup and prolong tool life. Start drilling at a low speed to establish a center and then increase speed within recommended limits while maintaining steady pressure. Withdraw the bit periodically to clear chips and prevent clogging.

Usage recommendations

For best results, use cutting oil on harder steels, maintain moderate drilling speeds to avoid overheating, and replace bits from the set when wear visibly affects hole quality. Store the set in a dry place and handle bits by the shank to preserve cutting edges.