Hertel 89321517 Screw Machine Drill Bit No 49 Hss

Product Description

The HERTEL 89321517 is a screw machine length drill bit sized to wire gauge No. 49, equivalent to 0.0730 inches in decimal. Built from high-speed steel with a bright, uncoated finish, it features a 118-degree split-free point geometry suited for general-purpose drilling in metal, wood, and plastics. The shortened overall length of 1-11/16 inches gives it added rigidity compared to jobber-length bits, reducing deflection during entry. This bit is used by machinists, tool-and-die technicians, and maintenance professionals who need controlled, repeatable hole sizing in small-diameter applications.

This drill bit is designed for screw machine and bench drill press work where a stubby, stiff profile is preferred over a standard jobber bit. The right-hand cutting direction makes it compatible with conventional drill press and hand drill operation. Its general-purpose grade and uncoated HSS construction make it a practical choice for light to medium production drilling in ferrous and non-ferrous materials. The wire gauge No. 49 size is commonly used when drilling pilot holes for small fasteners or clearance holes in precision assemblies.

Key Features

• Wire gauge No. 49 size — 0.0730 inch decimal equivalent for precise small-diameter drilling
• 118-degree point angle for general-purpose entry in a wide range of materials
• Screw machine length at 1-11/16 inches OAL provides added rigidity and reduced deflection
• 11/16 inch flute length optimized for chip clearance in shallow-depth applications
• High-speed steel construction maintains cutting edge integrity under moderate heat
• Bright, uncoated finish suitable for dry or lightly lubricated drilling operations

Compatibility

Designed as a general-purpose screw machine length drill bit for use in standard drill presses, screw machines, and CNC turret operations requiring a wire gauge No. 49 cutting diameter.

Installation Notes

Secure the bit firmly in a drill chuck rated for small-shank tooling before operation. Always power down and lock out the machine before changing or inspecting bits. Use cutting fluid when drilling hardened or stainless steels to extend tool life. This bit is intended for right-hand rotation only — do not run in reverse under load.