Value Collection 01290550 Screw Machine Drill Bit 1.10mm Hss

Product Description

The VALUE COLLECTION 01290550 is a screw machine length drill bit designed for high-speed drilling in metal, plastic, and similar materials. Built from high-speed steel (HSS) with an oxide coating for added surface hardness and lubricity, this bit measures 1.10 mm in diameter with an overall length of 28.00 mm (approximately 1.10 inches). The 118-degree standard point angle is suited for general-purpose drilling across a wide range of workpiece materials. A web-thinned, parallel-web construction reduces thrust at the cutting edge, making it easier to start and maintain hole accuracy at small diameters. Machinists, maintenance technicians, and tool-and-die professionals are the primary users of this bit size.

This drill bit is intended for screw machine, CNC, and bench-drill applications where a shorter overall length provides added rigidity and improved hole straightness. The straight cylindrical shank seats securely in standard drill chucks and collet holders. Its general-purpose grade and small diameter make it well suited for tapping pilot holes, instrument work, PCB drilling, and precision metalworking tasks requiring close dimensional tolerance at sub-2 mm diameters.

Key Features

• 1.10 mm diameter (0.0433 decimal inch) for sub-2 mm precision drilling
• High-speed steel construction with oxide coating for surface hardness and reduced friction
• 118-degree standard point angle for general-purpose material entry
• Web-thinned parallel web reduces thrust and improves centering on small-diameter holes
• Regular spiral, 2-flute design for efficient chip evacuation
• Straight cylindrical shank compatible with standard drill chucks and collet systems

Compatibility

Designed as a general-purpose screw machine length drill bit for use in standard drill chucks and collet holders accepting straight cylindrical shanks in the 0.00 to 3.50 mm drill bit size range.

Installation Notes

This bit is installed by a machinist or maintenance technician in a drill press, CNC machine, or hand-held power drill with an appropriate chuck capacity for sub-2 mm tooling. Secure the shank fully in the chuck or collet before running the spindle, and verify runout before drilling to prevent bit breakage at this diameter. At 1.10 mm, feed rate and spindle speed must be appropriate for the workpiece material; excessive feed pressure is the most common cause of breakage in small-diameter HSS bits. Coolant-through operation is not supported by this bit.