Kennametal 1201055 Straight-flute Drill Bit 5/8 in Carbide

Product Description

The KENNAMETAL 1201055 is a straight-flute solid carbide drill bit designed for high-accuracy drilling in cast iron and non-ferrous metals. It measures 5/8 inch (0.6250 inch) in diameter with a 130-degree split point that reduces walking and improves hole entry. The two-flute, web-thinned geometry lowers thrust requirements and supports cleaner chip evacuation. Coolant-through capability via round coolant holes allows internal coolant delivery directly to the cutting zone, extending tool life in production environments. The bright/uncoated finish suits applications where coating interaction with workpiece material is a concern. This bit is installed by machinists and tool-room professionals on CNC machining centers, drill presses, and manual mills.

The 1201055 targets precision machining operations on cast iron components and non-ferrous metal workpieces such as aluminum, brass, and copper alloys. It fits production drilling scenarios where tight diameter tolerances are required, with a diameter tolerance held to +0.0000 to +0.0005 inch. The Series K411 designation places it within Kennametal's long-series carbide drill line, conforming to DIN 6537L standards. Maximum drilling depth is 2.54 inches, with a 3.25-inch flute length and a shank length of 1.909 inches providing adequate clearance for that depth range.

Key Features

• Solid carbide construction for rigidity and wear resistance in abrasive materials
• 130-degree split point reduces drill walk and lowers entry thrust
• Web-thinned geometry decreases cutting resistance and improves chip flow
• Coolant-through design with round coolant holes delivers coolant directly to the cutting edge
• Bright/uncoated finish compatible with a wide range of non-ferrous and ferrous workpiece materials
• Tight diameter tolerance (+0.0000 to +0.0005 inch) suits close-tolerance hole requirements

Compatibility

Designed for use in cast iron and non-ferrous metal applications per Series K411 / DIN 6537L specification. Suitable for use in CNC machining centers and drill presses equipped with coolant-through spindle capability where internal coolant delivery is required.

Installation Notes

Installation and use should be performed by qualified machinists familiar with carbide tooling. Secure the shank fully in a precision collet or drill chuck rated for the spindle speed being used, and verify tool runout before cutting. Power down and lock out the machine before changing tooling. Avoid side-loading straight-flute carbide drills, as carbide is brittle and susceptible to chipping under lateral forces.