Precision Twist Drill 5995815 No. 27 Hss Jobber Drill

Product Description

The PRECISION TWIST DRILL 5995815 is a No. 27 wire-size jobber-length drill bit ground from high-speed steel (HSS) with a straw bronze coating and a 135-degree split-point tip. The web-thinned, 135-degree point reduces thrust and self-centers on contact, minimizing the need for a center punch on most materials. The regular spiral flute geometry handles general-purpose drilling in high-temp alloys, cast iron, aluminum, and steel. At 3 inches overall length with a 1.875-inch flute, this is a standard jobber ratio suited for through-hole and moderate-depth work in production and maintenance environments. Installation is performed by machinists, tool-and-die technicians, and maintenance mechanics.

The 5995815 is sized at 0.1440 inches (No. 27 wire gauge) with a straight cylindrical shank of equal diameter, making it compatible with standard drill chucks on corded drills, drill presses, and CNC machining centers. Primary workpiece material codes P, M, K, and S indicate suitability for steel, stainless steel, cast iron, and high-temp alloys respectively. The straw coating provides mild lubricity and heat resistance, extending edge life in repetitive-cycle applications. The tapered web and 2-flute configuration clear chips efficiently in short-to-moderate-depth holes up to 1.875 inches deep.

Key Features

• No. 27 wire size, 0.1440 inches diameter for precise through-hole sizing
• 135-degree web-thinned split point for reduced thrust and self-centering entry
• High-speed steel construction rated for steel, stainless, cast iron, and high-temp alloys
• Straw bronze coating for added lubricity and surface heat resistance
• Regular spiral, 2-flute design promotes efficient chip evacuation
• Straight cylindrical shank fits standard 3-jaw drill chucks without adapters

Compatibility

Part of the HX10-HX15-HX18 series. Designed as a direct-fit jobber drill for use in standard drill chucks accepting 0.1440-inch straight-shank tooling on drill presses, hand drills, and CNC machining centers.

Installation Notes

Secure the shank fully in a properly tightened 3-jaw or keyless chuck before operation. Ensure the drill press table or workpiece is clamped and the spindle speed is set appropriately for the workpiece material and drill diameter before engaging the bit. Inspect the cutting edges for chipping or wear before each use and replace the bit if the point geometry is compromised. Follow applicable ANSI safety standards for machine guarding and eye protection during all drilling operations.