Precision Twist Drill 5996990 No. 25 Hss Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5996990 is a No. 25 wire-size jobber-length drill bit ground from high speed steel (HSS) with a bright, uncoated finish. It measures 0.1495 inches in diameter and 3.0 inches in overall length, with a 1.875-inch flute length that supports drilling depths up to 1.875 inches. The 135-degree split point reduces walking on entry and requires less thrust than a 118-degree point, making it a practical choice for production and maintenance drilling. The web-thinned, tapered-web construction improves chip evacuation through the two regular-spiral flutes. Machinists, maintenance technicians, and tool-and-die tradespeople reach for this bit in everyday ferrous and non-ferrous drilling applications.

The 5996990 is suited for general-purpose drilling in steel, aluminum, and other non-ferrous materials, matching ISO material groups P, M, K, N, and S. The straight cylindrical shank at 0.1495 inches in diameter fits standard keyless and keyed drill chucks without adapters. It is at home in drill presses, hand drills, and CNC drilling operations where a short, rigid jobber-length bit is preferred over a screw-machine or long-series alternative. The QC21P series designation places this bit within a standard general-purpose HSS line manufactured to ANSI tolerances.

Key Features

• No. 25 wire size, 0.1495 inches diameter, for precision hole sizing between standard fractional increments
• 135-degree split point reduces entry walking and lowers feed force on harder materials
• Web-thinned tapered web improves chip flow and reduces heat buildup at the tip
• High speed steel construction handles steel, aluminum, and non-ferrous workpieces
• Bright uncoated finish for easy visual inspection of wear and regrind condition
• Right-hand cutting, regular spiral flute, straight shank — fits standard drill chucks directly

Compatibility

Designed as a general-purpose replacement or stock drill bit for any application requiring a No. 25 wire-size hole in steel, aluminum, or non-ferrous materials. Straight cylindrical shank is compatible with any standard 3-jaw drill chuck accepting shanks up to 0.1495 inches in diameter.

Installation Notes

Secure the shank fully in the drill chuck and verify concentricity before starting a cut. Disconnect or lock out power to the drill press or machine tool before changing bits, per standard lockout-tagout procedure. Use appropriate cutting fluid or coolant when drilling steel to extend tool life, noting that this bit does not support through-coolant delivery. Follow shop safety and applicable OSHA machine-guarding requirements when operating rotary cutting tools.