Chicago-latrobe 47715 Cobalt Drill Bit 15/64 in 135 Deg

Product Description

The CHICAGO-LATROBE 47715 is a cobalt jobber length drill bit designed for heavy-duty drilling applications in hard and abrasive materials. Sized at 15/64 inch (0.2344 inch decimal), it features a 135-degree split point that reduces walking on contact and lowers required feed pressure. The gold finish serves as a wear indicator and provides mild lubricity during cutting. At 3.875 inches overall length with a 2.625-inch flute, this bit fits standard drill chucks and drill presses used daily in mechanical, HVAC, and industrial service work. It is built to NAS 907-B specification and classified as a heavy-duty grade bit suitable for ferrous metals, stainless steel, and high-strength alloys.

This drill bit is suited for trade professionals who drill into tough base metals during equipment fabrication, bracket mounting, sheet metal work, and mechanical assembly. The cobalt construction handles heat buildup better than standard high-speed steel, making it a practical choice when drilling hard steel, cast iron, or stainless components found in HVAC equipment, piping systems, and electrical enclosures. The right-hand spiral flute clears chips efficiently, keeping the cut clean in both handheld and machine setups.

Key Features

• Cobalt construction with gold finish for heat resistance and wear indication
• 135-degree split point reduces drill walking and lowers feed force
• Web-thinned, tapered web configuration for improved chip clearance
• Right-hand cut with regular spiral flute for standard drilling operations
• Straight-cylindrical shank fits standard 3-jaw drill chucks
• Built to NAS 907-B specification, heavy-duty grade

Compatibility

Designed as a jobber-length drill bit for use in standard drill chucks, drill presses, and handheld power drills accepting a 15/64-inch straight-cylindrical shank.

Installation Notes

Install in a properly rated drill press or handheld drill with a chuck that accepts a 0.2344-inch straight shank. Secure the workpiece before drilling to prevent rotation. Use appropriate cutting fluid when drilling hard ferrous metals to extend bit life. Inspect the cutting edges before each use and replace if chipping or excessive wear is visible.