Hertel 74131012 Cobalt Screw Machine Drill Bit Size 49

Product Description

The HERTEL 74131012 is a cobalt screw machine length drill bit designed for high-speed drilling in tough materials including stainless steel, high-temperature alloys, and hardened steels. Built to wire gauge size 49 with a decimal diameter of 0.0730 inches, this bit features a 135-degree split point that reduces walking and requires no center punch on most surfaces. The web-thinned construction lowers thrust force and improves chip ejection. At 1-11/16 inches overall length, the stub-length body provides rigidity in tight-clearance applications. Machinists, tool-and-die technicians, and CNC operators rely on this geometry for accurate, repeatable holes in production environments.

This drill bit is suited for use in drill presses, CNC machining centers, and hand-held power drills where short overall length improves stability. The straight cylindrical shank fits standard drill chucks without adapters. Its screw machine length profile makes it a common choice in production shops drilling small-diameter holes in metal workpieces where rigidity and runout control are critical. The two-flute regular spiral design handles chip removal efficiently at standard feed and speed rates for cobalt tooling.

Key Features

• Cobalt high-speed steel (HSCo) construction for heat resistance in ferrous and difficult-to-machine metals
• 135-degree split point reduces thrust and eliminates walking without a center punch
• Web-thinned with parallel web configuration for reduced cutting resistance
• Screw machine (stub) length at 1-11/16 inches OAL provides rigidity over standard jobber length bits
• 11/16 inch flute length with regular spiral for efficient chip evacuation
• Right-hand cutting with straight cylindrical shank for universal chuck compatibility

Compatibility

Designed as a direct-fit replacement or standard tooling selection for any drill press, machining center, or power drill equipped with a chuck accepting straight cylindrical shanks sized for wire gauge tooling in the 0.0000 to 0.1000 inch decimal diameter range.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Secure the straight shank firmly in the drill chuck and verify runout before beginning production cuts. Ensure the machine spindle is fully stopped and locked out before changing or adjusting tooling. Follow the tool manufacturer and machine OEM recommended speeds and feeds for cobalt tooling in the workpiece material being drilled.