Hertel 74132093 Size 12 Cobalt Drill Bit Tialn 135 Deg

Product Description

The HERTEL 74132093 is a screw machine length drill bit designed for high-productivity metal cutting in tight-clearance applications. Built from cobalt high-speed steel and finished with a TiAlN coating, it handles hard and abrasive workpiece materials including alloy steels, stainless, and cast iron. The split point at 135 degrees reduces walking and allows drilling without a center punch on flat stock. At 2.25 inches overall length, the screw machine format provides added rigidity over jobber-length bits, making it well suited for drill press, CNC, and turret lathe work. Machinists and tool-and-die professionals are the primary users.

This bit is used in production machining environments where short, rigid tooling is needed to maintain hole accuracy and minimize deflection. The straight-cylindrical shank fits standard drill chucks and collet holders without modification. The 1.1875-inch flute length is sized for shallow-to-moderate hole depths typical of screw machine and short-run production work. It is appropriate for ferrous and non-ferrous metals, with the TiAlN coating providing thermal resistance at elevated cutting speeds.

Key Features

• Cobalt construction for heat resistance and extended tool life in hard metals
• TiAlN coating reduces friction and improves performance at high surface speeds
• 135-degree split point minimizes thrust and eliminates center-punch requirement
• Screw machine length body increases rigidity and reduces deflection vs. jobber-length bits
• Web-thinned, parallel web configuration for reduced cutting resistance
• Right-hand spiral flute for standard clockwise rotation in conventional drilling setups

Compatibility

Designed as a screw machine length drill bit for use in standard drill chucks and collet holders accepting a straight-cylindrical shank, sized for applications requiring a 0.1890 inch diameter hole.

Installation Notes

Installation and operation should be performed by qualified machinists following applicable shop safety procedures. Secure the workpiece fully before drilling and confirm the chuck or collet is properly tightened before spindle engagement. Ensure the machine spindle is at a full stop before changing or inspecting tooling. Do not exceed the recommended surface speed for the workpiece material and coating type.