Diameter D5-D20 Centering Carbide Tipped Drill Bits For Hardened Steel 90 Degree Apex Angle

Solid Carbide Centering Drills for Better Centering Performance with 90 Degree Apex Angle

Feature Advantage:

• Non-coated.
• Diameter D5-D20, complete types.
• Suitable for centering and chamfering on CNC machines.
• Compared with general center drilling tools, the centering drill is more stable, and the centering drilling can be easily performed on the inclined surface.

Technical Information:

• Typical application of integral alloy drill bits:
• Small diameter hole
• Tight or precision tolerance hole
• The hole shorter than a deep hole
• Chip formation and chip evacuation are important issues in drilling. It depends on the workpiece material, blade geometry selection, coolant pressure, capacity, and cutting parameters.
• Chip clogging can cause the drill bit to move radially and affect hole quality, bit life and reliability.
• The drill bit is mounted on the shank chuck and its circumferential runout must be less than 0.02 mm.

Recommended Cutting Parameters:

• When using this series of tools for the first time, the cutting is performed according to the recommended cutting speed of 90% or the feed rate of 85%. When the cutting condition is stable, the cutting speed and the feed are increased one by one.
• Cutting parameters are recommended for water soluble cutting fluids.
• Use a defect-free, clean chuck when installing the drill and control the drill runout to within 0.02 mm.
• The recommended cutting parameters are for applications where the hole depth is below 5D.
• The recommended cutting parameters are externally cooled drills, which can be increased by 10%-15% depending on the situation.