Hertel C.40W.1230 Taper Length Drill 31/64 Hss

Product Description

The HERTEL C.40W.1230 is a taper length twist drill bit manufactured from high-speed steel (HSS) with a black oxide finish. It features a 31/64-inch (0.4844 inches) diameter, a standard 118-degree split point angle, and a web-thinned, tapered web configuration that reduces thrust during entry and improves chip evacuation. The straight-cylindrical shank seats securely in standard drill chucks. With an overall length of 7.75 inches and a flute length of 4.75 inches, this bit provides greater reach than a jobber-length drill while maintaining rigidity. It is suited for machinists, tool-and-die tradespeople, and maintenance technicians drilling in steel, cast iron, and similar ferrous materials.

The C.40W.1230 is appropriate for general-purpose drilling operations in metal fabrication shops, maintenance and repair environments, and production settings where a longer reach is required than a standard jobber drill provides. The right-hand spiral flute geometry and black oxide finish offer moderate lubricity and corrosion resistance for dry or lightly lubricated drilling. No coolant-through capability is present, making it best suited for conventional external coolant or dry drilling setups.

Key Features

• 31/64-inch (0.4844 inches) diameter with web-thinned tapered web for reduced entry thrust
• 118-degree standard point angle for general-purpose ferrous drilling
• HSS construction provides toughness and regrindability
• Black oxide finish for moderate corrosion resistance and reduced friction
• Right-hand regular spiral flute for efficient chip removal
• Straight-cylindrical shank compatible with standard drill chucks

Compatibility

Designed as an OEM-style replacement or direct-use taper length drill bit compatible with standard drill chucks and drill presses accepting a straight-cylindrical shank in the 31/64-inch diameter range.

Installation Notes

Installation is performed by machinists or maintenance technicians using a standard keyed or keyless drill chuck on a drill press, milling machine, or hand drill. Secure the shank fully in the chuck before operation and verify chuck tightness. Use appropriate cutting fluid or follow dry drilling protocols per shop standards. Inspect the cutting edges for wear or chipping before each use and regrind or replace as needed to maintain safe cutting performance.