Import 27433 Jobber Length Drill Bit 12 Mm Hss

Product Description

The IMPORT 27433 is a jobber-length twist drill bit designed for general-purpose metal drilling in shop and field applications. It is manufactured from high speed steel (HSS) with an oxide coating that provides basic lubricity and surface protection during cutting. The bit features a 118-degree standard point angle, a regular spiral flute, and a straight-cylindrical shank that seats in standard three-jaw chucks. Overall length is 5-55/64 inches with a flute length of 4-3/8 inches, making it a standard jobber proportions for reach and rigidity. The web is thinned and tapered, reducing entry force and improving chip evacuation on through-holes.

This drill bit is suited for drilling mild steel, aluminum, brass, and similar materials on drill presses, hand drills, and mill setups. The 12 mm diameter (0.4724 inch decimal equivalent) places it in a common size range for bolt clearance holes, pilot holes, and general fabrication work. Right-hand cutting direction is standard for conventional drill press and hand-drill spindle rotation. It is sold individually with a minimum order quantity of 6 units per transaction.

Key Features

• 12 mm diameter (0.4724 inch) with 118-degree standard point angle for general-purpose entry
• High speed steel construction with oxide coating for surface protection
• Web-thinned, tapered web reduces thrust force and improves chip clearance
• Regular spiral flute promotes consistent chip evacuation in through-hole drilling
• Straight-cylindrical shank fits standard three-jaw drill chucks without adapters
• Jobber-length proportions balance reach and rigidity for bench and portable tool use

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any drill press, hand drill, or milling machine equipped with a standard three-jaw chuck sized to accept a 0.4724-inch straight shank.

Installation Notes

Secure the shank fully in the chuck and verify concentricity before beginning a cut. Use appropriate cutting fluid or lubricant when drilling ferrous materials to extend tool life and maintain hole quality. Ensure the workpiece is clamped securely to prevent rotation. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point is degraded.