Hertel 74130618 Screw Machine Drill Bit Size 10 Cobalt

Product Description

The HERTEL 74130618 is a cobalt screw machine length drill bit designed for high-speed drilling in tough materials including stainless steel, hardened alloys, and heat-resistant metals. It carries a wire gauge Size 10 designation, which equals 0.1935 inches in decimal. The 135-degree split point geometry reduces walking on entry and lowers thrust requirements compared to a standard 118-degree point. Web thinning at the tip further improves chip evacuation. Overall length is 2.25 inches with a flute length of 1.1875 inches, making this a compact, rigid cutter suited to close-tolerance work in production and maintenance environments. Licensed machinists, tool-and-die techs, and maintenance professionals are the primary users.

Screw machine length drill bits are shorter than jobber-length bits of the same diameter, which increases rigidity and reduces deflection in CNC machining centers, manual drill presses, and screw machines. This bit is well suited for drilling small-diameter through-holes and blind holes in ferrous metals, superalloys, and other abrasion-resistant materials. The straight cylindrical shank seats in standard three-jaw chucks and collet holders without modification. The straw finish indicates a heat-treat process consistent with HSCO135 series cobalt tooling.

Key Features

• Cobalt high-speed steel construction for heat resistance and extended tool life in hard materials
• 135-degree split point reduces walking, lowers entry thrust, and improves hole location accuracy
• Web-thinned parallel web design promotes chip flow and reduces cutting resistance
• Screw machine length body provides greater rigidity and less deflection versus jobber-length bits
• Right-hand cut with regular spiral flute geometry for standard drilling applications
• Straight cylindrical shank fits standard drill chucks and collet holders without adaptation

Compatibility

Designed as a standard screw machine length drill bit for use in CNC machining centers, manual drill presses, and automatic screw machines that accept straight shank tooling in the 0.1500 to 0.2000 inch decimal diameter range.

Installation Notes

Installation and use of this bit should be performed by qualified machinists or maintenance professionals familiar with machine tool operation and cutting tool safety. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Secure the shank fully in the chuck or collet to the recommended grip depth to prevent pullout under load. Do not exceed the recommended cutting speeds and feeds for cobalt tooling in the material being drilled, and use appropriate cutting fluid where the material and application require it.