Import 27430 Jobber Length Drill Bit 10.5 Mm Hss

Product Description

The IMPORT 27430 is a jobber-length twist drill bit designed for general-purpose drilling in metal, wood, and plastics. Built from high speed steel (HSS) with an oxide finish, the bit resists heat buildup during extended use. It measures 10.5 mm (0.4134 inches) in diameter with a 118-degree standard point angle and a right-hand spiral flute for efficient chip evacuation. Overall length is 133 mm (5.24 inches) with a flute length of 98 mm (3.86 inches). The straight-cylindrical shank seats securely in standard keyless or keyed drill chucks. Installation is straightforward for machinists, pipefitters, electricians, and general trade technicians who need a reliable, consistent-cutting bit for everyday hole-making tasks.

This bit is suited for light to medium-duty drilling applications in residential and commercial trade work. The general-purpose grade makes it appropriate for use in hand-held drills, drill presses, and benchtop machines. The web-thinned, tapered-web construction reduces thrust requirements at the drill point, which helps when starting holes without center-punching. The 10.5 mm diameter falls within the 10.00 to 12.50 mm size range commonly used for clearance holes, anchor-bolt pilots, and conduit knockout prep across HVAC, plumbing, and electrical trades.

Key Features

• 10.5 mm (0.4134 inches) diameter with straight-cylindrical shank for standard chuck compatibility
• 118-degree standard point angle for general-purpose material entry
• High speed steel construction with oxide coating for heat and wear resistance
• Right-hand spiral flute with regular spiral type for efficient chip removal
• Web-thinned, tapered-web design reduces drilling thrust at the point
• 133 mm (5.24 inches) overall length with 98 mm (3.86 inches) flute length

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with standard keyed and keyless drill chucks accepting a 0.4134-inch straight-cylindrical shank, for use in portable drills and stationary drill press applications.

Installation Notes

Secure the shank fully in the chuck and verify concentricity before drilling. Ensure the workpiece is clamped or fixtured to prevent rotation. Apply cutting fluid or cutting oil when drilling ferrous metals to extend bit life and reduce heat. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point shows rounding or damage.