Hertel 74149014 Screw Machine Drill Bit 25/64 Solid Carbide

Product Description

The HERTEL 74149014 is a screw machine length drill bit designed for high-demand metal cutting applications. Built from solid carbide with a bright/uncoated finish, it measures 25/64 inch (0.3906 inches) in diameter and 3.25 inches overall length. The 135-degree split point geometry reduces walking and requires minimal feed force at entry. A slow spiral, two-flute configuration with a web-thinned, parallel web design helps control chip evacuation in tough materials. This bit is intended for use by machinists, tool and die professionals, and metalworking tradespeople working with precision drilling requirements.

This drill bit is rated for use in cast iron, nickel alloy, stainless steel, titanium alloy, and tool steel. The screw machine length format provides a shorter, more rigid profile than jobber-length bits, making it well suited for close-tolerance work in CNC machining centers, turret lathes, and manual drill presses. The straight-cylindrical shank fits standard collets and chucks without modification. Right-hand cutting direction is standard for conventional clockwise spindle rotation.

Key Features

• Solid carbide construction provides rigidity and heat resistance in hard-metal applications
• 135-degree split point reduces thrust force and eliminates the need for a center punch in most setups
• Web-thinned parallel web improves chip clearance and reduces torque load
• Slow spiral flute geometry supports chip control in materials that produce long, stringy chips
• Bright/uncoated finish allows easy visual wear inspection during use
• Diameter tolerance held to +0.0000 to -0.0005 inches for precision fitment

Compatibility

Designed for use in cast iron, nickel alloy, stainless steel, titanium alloy, and tool steel workpieces. Straight-cylindrical shank accepts standard drill chucks and collet systems sized for 25/64 inch shanks.

Installation Notes

Installation and use of this bit should be performed by qualified machinists or metalworking tradespeople familiar with cutting tool setup and speeds and feeds for carbide tooling. Ensure spindle and workpiece are fully secured before operation. Carbide is brittle - avoid interrupted cuts or side loading without verifying setup rigidity. Inspect the bit for chipping or wear before each use and replace if the cutting edge is compromised.