Precision Twist Drill 6000678 Jobber Drill Bit 0.3937in Hss

Product Description

The PRECISION TWIST DRILL 6000678 is a jobber-length twist drill bit designed for general-purpose drilling in metal and hard materials. It measures 0.3937 inches in diameter with a 118-degree standard point angle and a right-hand spiral flute configuration. The bit is manufactured from high-speed steel with a bright uncoated finish. Overall length is 5.2362 inches (133 mm), and the straight-cylindrical shank matches the drill diameter at 0.3937 inches. A web-thinned, tapered-web design reduces thrust at entry and improves chip evacuation. This bit is installed by machinists, maintenance technicians, and mechanical contractors using standard drill chucks.

This drill bit is suited for production and maintenance drilling in steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. The 9xD flute-to-diameter ratio and 3.4252-inch flute length support drilling to a maximum depth of 3.4252 inches, making it appropriate for through-hole and blind-hole applications in both shop and field settings. It conforms to DIN 338 and ANSI standards and is classified under Series 2A for general-purpose performance.

Key Features

• 0.3937-inch diameter with matching straight-cylindrical shank for secure chuck engagement
• 118-degree standard point angle for general-purpose entry on common metals
• High-speed steel construction handles steel, stainless steel, cast iron, and superalloys
• Web-thinned, tapered-web design reduces drilling thrust and improves chip flow
• Right-hand spiral flute with 9xD ratio supports depths up to 3.4252 inches
• Conforms to DIN 338 and ANSI standards for dimensional consistency

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard drill chuck accepting a 0.3937-inch straight-cylindrical shank. Suitable for use in benchtop drill presses, hand-held power drills, and CNC drilling operations across workpiece materials coded P, M, K, N, and S.

Installation Notes

Installation is performed by machinists or mechanical technicians using a standard drill press, hand drill, or CNC spindle. Secure the shank fully in the chuck and verify runout before drilling. Apply appropriate cutting fluid when drilling stainless steel, superalloys, or titanium to extend tool life. Inspect the cutting edges and web condition before each use and replace the bit if chipping or excessive wear is present.