Kennametal 3885829 Carbide Stub Drill Bit 6mm Altin

Product Description

The KENNAMETAL 3885829 is a solid carbide stub-length drill bit designed for precision hole-making in hard and abrasive materials. Ground to a 180-degree flat-bottom point, it is suited for applications requiring full-diameter entry without a conventional conical tip. The AlTiN coating provides thermal resistance and hardness at elevated cutting temperatures. At 6.00 mm (0.2362 inches) in diameter with a 66.00 mm (2.5984 inches) overall length and a 28.00 mm (1.1024 inches) flute length, this bit fits the stub-length form factor of the B707A-FBL series. Internal coolant-through capability supports chip evacuation and heat management during deep cuts. It is typically installed and operated by machinists and CNC tool setters.

This drill bit is used in screw machine operations, CNC machining centers, and manual drilling applications where flat-bottomed blind holes or close-tolerance bores are required. The stub-length body increases rigidity and reduces deflection compared to jobber-length bits, making it well suited for tight setups and hard workpiece materials. The right-hand cut, straight shank, and regular spiral flute geometry are standard for most spindle and chuck configurations. Maximum drilling depth is 20.00 mm (0.7874 inches). The shank diameter matches the cutting diameter at 6.00 mm (0.2362 inches), allowing direct collet or drill chuck holding.

Key Features

• 180-degree flat-bottom point for full-diameter entry and flat-bottomed blind holes
• AlTiN coating for high-temperature wear resistance in hard and abrasive materials
• Coolant-through design supports chip evacuation and cutting zone heat control
• Stub-length body provides increased rigidity and reduced deflection
• Right-hand cut with regular spiral flute geometry and tapered web configuration
• Diameter tolerance held to +0.0002 to +0.0006 inches (+0.004 to +0.016 mm) for precision fitment

Compatibility

Designed as a direct-fit replacement or original-specification tooling within the KENNAMETAL B707A-FBL series. Straight shank conforms to DIN 6535 specification, compatible with standard collet chucks, Weldon holders, and drill chucks accepting 6.00 mm straight-shank tooling.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Ensure the machine spindle is fully stopped and the tool is secured to the specified runout tolerance before operation. Use a torque-rated collet or chuck rated for the shank diameter. Verify coolant-through supply pressure and flow rate are appropriate for the material and feed rate before initiating the cut.