D3.0-D20.0 diameter
The length includes 3D and 5D.
Each model has two types: internal cooling and external cooling.
The first choice for mild steel and stainless steel drilling.
The sharp cutting edge avoids the formation of built-up edge and is suitable for high performance drilling.
The optimized drill tip structure enhances the strength of the chisel and inner edges, makes the cutting lighter and the chip breaking is better.
Nano-TiAlN coating for excellent wear and high temperature resistance.
The unique groove structure has large effective chip space, smooth chip removal and stable drilling.

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 clogging can cause the drill bit to move radially and affect hole quality, bit life and reliability.
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.
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.

5D Internal Cooling Carbide Drill Bits For Hardened Steel / Hss Drill Bits

CNC Carbide Inserts