Bsc Preferred QJDIB-DB-040 Cobalt Drill Bit 5/16 Inch

Product Description

The BSC PREFERRED QJDIB-DB-040 is a 5/16-inch cobalt drill bit engineered for industrial-grade performance in hard and abrasive materials. It features a 135-degree split point tip that penetrates quickly and prevents the bit from walking on contact, allowing for accurate starts without a center punch. The reinforced core resists breakage under load and delivers a service life rated up to 9 times longer than standard black oxide bits. Licensed tradespeople and industrial machinists use this bit when working with demanding substrates where conventional high-speed steel bits degrade prematurely.

This bit is suited for drilling stainless steel, titanium, and similarly hard metals encountered in mechanical, plumbing, and fabrication work. It also handles softer substrates including wood and PVC, making it a versatile addition to a service technician's kit. Typical applications include hole-making during equipment installation, bracket fabrication, and field repair work across HVAC, plumbing, and electrical trades.

Key Features

• 135-degree split point prevents walking and enables accurate, no-punch starts
• Cobalt construction rated for drilling stainless steel, titanium, and other hard abrasive metals
• Reinforced core design resists breakage under drilling pressure
• Service life up to 9 times longer than standard black oxide drill bits
• Also compatible with softer materials including wood and PVC
• Sold individually, 5/16-inch diameter

Compatibility

Designed for use in standard drill chucks and drill presses accepting 5/16-inch shank bits. Suitable for hand drills, drill presses, and magnetic base drills used across metalworking and trade applications.

Installation Notes

A licensed tradesperson or machinist should select the appropriate cutting speed for the substrate material before beginning. Secure the workpiece fully before drilling to prevent movement. Apply cutting fluid or lubricant when drilling hard metals such as stainless steel to reduce heat buildup and extend bit life. Disconnect or de-energize any equipment being drilled into prior to starting work.