Kennametal 4151186 Screw Machine Drill Bit 8.80mm Carbide

Product Description

The KENNAMETAL 4151186 is a screw machine length (stub) drill bit engineered for precision hole-making in demanding industrial applications. Built from solid carbide with a multilayer TiAlN coating, this bit delivers extended tool life and heat resistance at elevated cutting speeds. The 140-degree split point reduces thrust force and improves centering accuracy without a pilot hole. At 89.00 mm overall length with a 47.00 mm flute length, it is designed for rigid, close-quarters drilling setups common in CNC machining centers and screw machine operations. Coolant-through capability supports chip evacuation and thermal management in deep-hole passes up to 35.00 mm.

This drill bit is suited for production machining environments where repeatable hole quality and tool longevity are priorities. The straight cylindrical shank at 10.00 mm diameter fits standard ER and hydraulic toolholders. The 3xD flute-to-diameter ratio and regular spiral geometry make it effective in a range of ferrous and non-ferrous workpiece materials. Machinists and CNC operators in aerospace, automotive, and general metalworking shops are the primary installers. The DIN 6537K specification ensures dimensional consistency across production runs.

Key Features

• Solid carbide construction with multilayer TiAlN coating for high-temperature wear resistance
• 140-degree point angle with standard point geometry for self-centering entry
• Coolant-through design for active chip flushing and heat control at depth
• Straight cylindrical shank compatible with standard collet and hydraulic toolholders
• Tapered web configuration reduces torque demand and improves rigidity
• DIN 6537K specification for dimensional interchangeability

Compatibility

Designed as an OEM-style replacement and production drill in the KENNAMETAL B051A-CPG series, conforming to DIN 6537K stub-length drill standards. Fits any toolholder accepting a 10.00 mm straight cylindrical shank.

Installation Notes

This bit is installed by machinists and CNC operators using standard collet chucks, hydraulic chucks, or shrink-fit holders rated for the shank diameter. Confirm spindle RPM and feed rate against the workpiece material and coolant delivery pressure before running. Inspect the shank and toolholder bore for contamination or runout before clamping. Do not exceed the maximum drilling depth of 35.00 mm per pass without retracting to clear chips.