Hertel C.40W.1667 Taper Length Drill Bit 0.6562 in Hss

Product Description

The HERTEL C.40W.1667 is a taper length twist drill bit designed for drilling operations that require greater reach than a jobber-length bit without stepping up to a full aircraft-length tool. Built from high-speed steel (HSS) with a black oxide finish, it carries a 21/32-inch (0.6562-inch) diameter and a standard 118-degree point angle. The web-thinned, tapered-web geometry reduces thrust load at the tip, making starts more positive and reducing walking on flat stock. At 9 inches overall length with a 5.125-inch flute, it suits deep-hole applications in steel, cast iron, aluminum, and similar materials. Right-hand spiral flutes evacuate chips efficiently during through-hole drilling.

This drill bit is suited for general metalworking and fabrication environments where standard jobber bits lack the reach. Typical applications include structural steel fabrication, machine shops, maintenance and repair operations, and toolroom use. The straight-cylindrical shank seats directly in standard drill chucks and quick-change collet holders without requiring a taper adapter, keeping setup time low. It is sold individually and appropriate for benchtop drill press, radial arm drill, and hand-held drill motor use.

Key Features

• 21/32-inch (0.6562-inch) diameter with matching straight-cylindrical shank for direct chuck mounting
• 118-degree standard point angle with web-thinned, tapered-web design for reduced entry thrust
• HSS construction provides toughness across a broad range of ferrous and non-ferrous workpiece materials
• Black oxide finish offers mild lubricity and corrosion resistance during storage and use
• Right-hand regular spiral flute promotes consistent chip evacuation in through-hole and blind-hole drilling
• 9-inch overall length with 5.125-inch flute extends reach beyond standard jobber-length drills

Compatibility

Designed as an OEM-style taper length drill bit compatible with standard drill chucks and collet holders accepting a 21/32-inch straight-cylindrical shank.

Installation Notes

Installation and use of this drill bit should be performed by a qualified machinist or metalworker familiar with safe drilling practices. Ensure the drill press or drilling machine is powered down and locked out before changing tooling. Secure the workpiece firmly with a vise or clamp — never hold freehand when drilling stock of this diameter. Apply cutting fluid appropriate to the workpiece material to extend tool life and maintain dimensional accuracy.