Hertel 74130907 Cobalt Screw Machine Drill Bit Size 38

Product Description

The HERTEL 74130907 is a cobalt screw machine length drill bit designed for high-speed drilling in hard and abrasive materials. Built to wire gauge size 38 with a decimal equivalent of 0.1015 inches, this bit features a 135-degree split point that reduces walking and cuts through workpieces with less feed pressure than conventional 118-degree points. The stub-length body keeps the bit rigid, making it well suited for applications where deflection and chatter are concerns. Two regular spiral flutes evacuate chips efficiently during the cut. The straight cylindrical shank fits standard drill chucks without modification. This bit is sold individually but requires a minimum order of 12 units per transaction.

This bit is used in metalworking, fabrication, and maintenance applications where wire gauge hole sizes are required in steel, stainless steel, cast iron, and other ferrous materials. The cobalt construction handles the heat generated when drilling harder alloys without losing temper at the cutting edge. Screw machine length bits are a common choice on drill presses and CNC equipment in production environments, as well as in handheld drill applications where a shorter, stiffer bit improves accuracy. Licensed machinists, millwrights, and maintenance technicians are the primary users of this product type.

Key Features

• Cobalt construction resists heat buildup when drilling hard ferrous alloys
• 135-degree split point reduces bit walking and lowers required feed pressure
• Web-thinned parallel web design improves chip clearance at the tip
• Stub screw machine length body maximizes rigidity and reduces deflection
• Straight cylindrical shank fits standard three-jaw drill chucks
• Right-hand cutting direction compatible with standard drill rotation

Compatibility

Designed as an OEM-style replacement or production-supply bit for applications requiring a wire gauge size 38 hole at 0.1015 inches diameter, fitting standard straight-shank drill chucks used in drill presses, CNC drilling machines, and handheld power drills.

Installation Notes

Install in a properly sized drill chuck and tighten securely before operation. Ensure the workpiece is clamped or fixtured to prevent rotation during drilling. Use appropriate cutting fluid when drilling stainless steel or hardened alloys to extend tool life and manage heat. Inspect the cutting edge for wear before each use and replace the bit if the split point shows chipping or the flutes are damaged.