Drill bit GRAPHITE 57H038 cobalt for metal, cylindrical shank, 6 mm

The GRAPHITE cobalt drill bit model 57H038 is a 6 mm metalworking drill designed for drilling stainless steel and other ferrous materials. With a cylindrical shank, this tool is compatible with handheld drills and drill presses used in metalworking, maintenance and fabrication tasks. The cobalt composition gives the bit increased heat resistance and improved wear life compared with standard high-speed steel bits, making it suitable for tougher drilling conditions.

Advantages

The cobalt alloy cutting tip provides higher red-hardness and longer service life when drilling hard or heat-generating materials. The precise 6 mm diameter and ground flute geometry ensure consistent hole size and good chip evacuation. The cylindrical shank allows straightforward mounting in standard drill chucks, offering a secure fit for both portable drills and bench-mounted machines. The overall design reduces the need for frequent resharpening and helps maintain drilling accuracy over multiple uses.

Suitable for

• Drilling stainless steel and other ferrous metals
• Maintenance and repair tasks in workshops and industrial settings
• Fabrication and metal assembly where durable drill bits are required
• Use with handheld drills and drill presses

Key specifications

• Material: cobalt alloy cutting tip for enhanced heat resistance and wear resistance
• Diameter: 6 mm
• Shank type: cylindrical shank for standard chucks
• Application: suitable for stainless steel and other ferrous materials
• Compatibility: designed for use with handheld electric drills and drill presses

How to use

Select an appropriate cutting speed and apply steady pressure when starting the hole; use slower speeds and cutting lubricant when drilling stainless steel to reduce heat buildup. Secure the workpiece with clamps or a vice to prevent movement. Mark the drilling point and start with a small pilot mark or center punch if necessary to prevent wandering. Begin drilling at low speed to establish the hole, then increase speed as the bit engages. Withdraw periodically to clear chips and, for deeper holes, use intermittent drilling to avoid overheating.

Usage recommendations

To extend tool life and maintain performance when drilling stainless steel or other hard metals, use appropriate cutting fluid, maintain moderate feed pressure, and avoid excessive speeds. Inspect the bit for wear or chipping before use and replace or resharpen when accuracy decreases.