Irwin 63126 Cobalt Jobber Drill Bit 13/32 in 135 Deg

Product Description

The IRWIN 63126 is a cobalt jobber-length drill bit designed for general-purpose drilling in ferrous metals including steel and cast iron. Built from M35 cobalt steel, it delivers improved heat resistance and edge retention compared to standard high-speed steel bits. The 135-degree split point geometry reduces walking on entry and minimizes the need for a center punch. At 5.25 inches overall length with a 3.875-inch flute length, this is a standard jobber-length profile suited to hand-held drills, drill presses, and machining centers. The bright, uncoated finish is paired with a web-thinned, tapered web configuration for reduced thrust during penetration. Two right-hand spiral flutes evacuate chips efficiently during through-hole operations.

This drill bit is intended for maintenance, repair, and production drilling applications where hardened or abrasive ferrous materials are encountered. The straight shank with a 0.4063-inch shank diameter seats directly into standard drill chucks across a wide range of portable and stationary equipment. Typical users include HVAC technicians, pipefitters, electricians, millwrights, and general maintenance mechanics drilling into structural steel, pipe, angle iron, and cast iron components.

Key Features

• M35 cobalt steel construction for heat resistance and extended tool life in ferrous materials
• 135-degree split point reduces walking and lowers required entry thrust
• Web-thinned tapered web configuration reduces drilling resistance
• Regular spiral flute geometry promotes consistent chip evacuation
• Bright, uncoated finish suited to general-purpose maintenance drilling
• Straight shank compatible with standard drill chucks

Compatibility

Designed as a general-purpose jobber-length drill bit for use in standard drill chucks accepting a 0.4063-inch straight shank. Suited for drilling steel and cast iron workpieces in maintenance and light production environments.

Installation Notes

Installation and use should be performed by qualified tradespeople familiar with rotating tool safety practices. Secure the workpiece before drilling and ensure the chuck is fully tightened before operation. Wear appropriate eye protection and avoid exceeding the recommended drilling depth of 3.875 inches. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.