Precision Twist Drill 6002734 5/16 in Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 6002734 is a solid carbide jobber-length drill bit ground to a 118-degree standard point angle for general-purpose drilling in a wide range of materials. The bit measures 5/16 inch (0.3125 inch) in diameter with an overall length of 3.75 inches and a flute length of 2.375 inches, giving it an 8xD flute-to-diameter ratio suited to moderate-depth through-hole work. A bright, uncoated finish keeps the surface true to the carbide substrate without added coating thickness. The straight cylindrical shank seats directly in standard drill chucks. Web thinning reduces entry thrust, and the tapered web maintains rigidity through the full flute length. This bit is installed by machinists, maintenance technicians, and trade professionals working in metal fabrication and mechanical service environments.

This jobber-length drill bit is designed for drilling steel, stainless steel, cast iron, non-ferrous metals, and other hard materials. The two-flute right-hand spiral configuration evacuates chips efficiently in both through-hole and blind-hole applications. Typical use cases include structural fabrication, equipment repair, and production drilling where a general-purpose carbide bit is preferred over high-speed steel for improved wear resistance on harder workpieces. The D33F series designation places this bit within PRECISION TWIST DRILL's standard jobber line, conforming to ANSI dimensional standards.

Key Features

• 5/16 inch diameter (0.3125 inch) with straight cylindrical shank of equal diameter
• 118-degree standard point angle with web thinning for reduced entry thrust
• Solid carbide construction for extended tool life on hard and abrasive materials
• Bright uncoated finish — no coating thickness to affect hole tolerance
• 2-flute right-hand spiral, regular spiral type, for efficient chip evacuation
• Conforms to ANSI jobber-length standards; Series D33F

Compatibility

Designed as a general-purpose jobber-length replacement drill bit compatible with standard 3-jaw drill chucks and collet systems accepting a 5/16 inch straight cylindrical shank. Rated for use in steel, stainless steel, cast iron, non-ferrous metals, and hard materials per manufacturer workpiece material classifications P, M, K, N, and H.

Installation Notes

Installation is performed by machinists or qualified trade technicians using a standard drill press, hand drill, or CNC spindle. Secure the shank fully in the chuck or collet before operation and verify runout before drilling. Coolant-through is not supported on this bit; apply cutting fluid externally when drilling stainless steel or hard alloys to manage heat. Inspect the cutting edges and web for chipping before each use, as carbide is brittle and sensitive to side-loading or impact.