Precision Twist Drill 5999779 No. 11 Hss Jobber Drill

Product Description

The PRECISION TWIST DRILL 5999779 is a high speed steel jobber-length drill bit sized to wire gauge No. 11 (0.1910 inches decimal). It features a 135-degree split point angle with web thinning for reduced thrust and faster engagement on hard materials. An oxide and bronze coating provides lubricity and mild heat resistance during drilling operations. The straight-cylindrical shank measures 0.1910 inches in diameter and seats securely in standard drill chucks. With an overall length of 3.5 inches and a 1.1875-inch flute length, this bit suits close-tolerance drilling tasks across metal fabrication and maintenance applications. Two regular spiral flutes evacuate chips efficiently in right-hand cutting direction.

This drill bit is rated for use in steel, stainless steel, cast iron, non-ferrous metal, superalloys, titanium, and other hard materials. It is a general-purpose tool suited to manual drill presses, CNC drilling centers, and hand-held pneumatic or electric drills in machine shops, fabrication facilities, and industrial maintenance environments. The NAS 907 specification designation confirms dimensional and material standards compliance appropriate for aerospace and precision manufacturing work.

Key Features

• Wire gauge No. 11 size — 0.1910 inches decimal diameter for precise hole sizing
• 135-degree split point with web thinning reduces walking and lowers required thrust
• Oxide and bronze coating improves lubricity and extends tool life in ferrous materials
• High speed steel construction handles steel, stainless steel, cast iron, and superalloys
• NAS 907 specification compliance for dimensional accuracy in precision applications
• Regular spiral, two-flute design promotes efficient chip evacuation during through-hole drilling

Compatibility

Designed for use in standard straight-shank drill chucks across drill presses, CNC machining centers, and handheld power drills. Compatible workpiece materials include steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium (material codes P, M, K, N, S). Part of the PRECISION TWIST DRILL Series R88CO-R89CO.

Installation Notes

Machinist or maintenance technician installation is typical. Secure the straight-cylindrical shank fully in the chuck and verify runout before drilling. Power down the machine and lock out energy sources before changing bits or clearing chip jams. Follow shop-specific speeds and feeds for the target workpiece material to avoid overheating the cutting edge.