Value Collection BS27N0004 No. 4 Hss Jobber Drill Bit

Product Description

The VALUE COLLECTION BS27N0004 is a No. 4 wire-size jobber-length drill bit designed for general-purpose drilling in aluminum and non-ferrous materials. Ground from high-speed steel (HSS) with a bright, uncoated finish, the bit measures 0.2090 inches in diameter and 3.75 inches overall. The 130-degree split point and web-thinned, tapered web geometry reduce walking at entry and lower the thrust force required to start a hole. The slow-spiral flute design promotes chip clearance in softer, gummier materials like aluminum, copper, and brass. Two straight flutes run 2.5 inches in length along a straight cylindrical shank. Right-hand cutting direction is standard.

This jobber drill is suited for maintenance, fabrication, and light production work where aluminum, copper, brass, and other non-ferrous metals are drilled by hand or on a drill press. The general-purpose grade and ANSI specification designation make it a reliable fit for shop environments, field service, and trade apprenticeship stock. The straight shank seats directly in standard three-jaw keyed or keyless drill chucks. Sold as a single unit.

Key Features

• No. 4 wire size: 0.2090 inch diameter for precise fit to wire-gauge hole charts
• 130-degree point angle with web-thinned, tapered web for reduced entry thrust
• Slow-spiral flute geometry promotes chip evacuation in aluminum and non-ferrous materials
• High-speed steel construction provides adequate hardness for general-purpose use
• Bright, uncoated finish — suitable for use with cutting fluid where needed
• ANSI specification compliance for consistent dimensional tolerancing

Compatibility

Designed as a general-purpose jobber drill for use in any standard three-jaw drill chuck accepting a 0.2090-inch straight cylindrical shank, including handheld power drills and bench or floor drill presses.

Installation Notes

Secure the shank fully in the chuck and confirm concentricity before drilling. When drilling aluminum or non-ferrous metals, apply a suitable cutting fluid to reduce heat buildup and extend edge life. Inspect the cutting edges before each use — a dull or chipped point should be re-ground or replaced to avoid work-hardening the workpiece surface. Wear appropriate eye protection per shop safety standards.