Precision Twist Drill 5996329 Letter B Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5996329 is a Letter B jobber-length drill bit designed for general-purpose and heavy-duty drilling applications. Built from M2 high-speed steel with a straw (bronze) coating, it features a 135-degree split point that reduces walking and improves bite on hard and high-temperature alloy workpieces. The web-thinned, tapered web design lowers thrust requirements during entry. At 4 inches overall length with a 2.75-inch flute and a straight cylindrical shank, this bit is sized for standard drill chucks and compatible with most benchtop and handheld drilling setups used by machinists, fabricators, and maintenance trades.

This drill bit is suited for drilling into high-temperature alloys, ferrous metals, and general structural materials in production, maintenance, and repair settings. The HX10-HX15-HX18 series designation places it within a family of M2 HSS jobber drills engineered for consistent performance in both CNC and manual drilling operations. The right-hand cutting direction and regular spiral flute geometry support efficient chip evacuation in through-hole and blind-hole applications.

Key Features

• M2 high-speed steel construction rated for heavy-duty and high-temperature alloy drilling
• 135-degree standard split point reduces bit walking and improves penetration on hard materials
• Straw (bronze) coating provides surface lubricity and heat resistance
• Web-thinned, tapered web lowers drilling thrust and extends tool life
• 2-flute regular spiral geometry promotes clean chip evacuation
• Straight cylindrical shank fits standard drill chucks without adapters

Compatibility

Part of the PRECISION TWIST DRILL Series HX10-HX15-HX18. Designed as a general-purpose OEM-style jobber drill bit compatible with any standard drill chuck accepting a 0.2380-inch straight shank. Suitable for use with benchtop drill presses, handheld power drills, and CNC drilling equipment.

Installation Notes

Installation should be performed by qualified machinists or maintenance technicians familiar with proper chuck-securing procedures. Secure the shank fully in the chuck and confirm concentricity before beginning a cut. Power down and de-energize all equipment before changing bits. Do not exceed the rated drilling depth of 2.75 inches and ensure appropriate feeds and speeds are observed for the target workpiece material.