Hertel 84580687 Jobber Drill Bit Letter U 0.3680 in Hss

Product Description

The HERTEL 84580687 is a Letter U jobber-length drill bit ground from high speed steel with a black oxide coating. It is sized at 0.3680 inches in diameter and features a 135-degree split point that reduces walking and lowers the thrust needed to start a hole. The two-flute spiral design with a web-thinned, tapered web promotes chip evacuation during holemaking. At 5 inches overall length with a 3-5/8-inch flute length, it fits standard three-jaw chucks and collet holders without adapters. Right-hand cutting direction suits the vast majority of drill press and handheld applications. This bit is rated heavy duty and carries NAS specification designation.

This bit is used in general holemaking operations across metal fabrication, mechanical assembly, and maintenance repair work. It is suited for drilling steel, iron, and similar ferrous materials where an oxide-coated HSS tool is appropriate. The straight-cylindrical shank at 0.3680 inches diameter fits directly into standard drill chucks without a reduction sleeve. It is a single-piece per package item appropriate for technicians stocking individual sizes or replacing worn bits in a set.

Key Features

• 135-degree split point reduces center-punch dependency and lowers feed force
• Web-thinned tapered web improves chip flow and reduces heat buildup at the tip
• Black oxide coating provides mild lubricity and corrosion resistance during storage
• Two regular spiral flutes clear chips efficiently in through-hole and blind-hole applications
• Heavy duty grade with NAS specification designation for consistent dimensional tolerance
• Straight-cylindrical shank fits standard chucks without bushings or adapters

Compatibility

Designed as a standard jobber-length drill bit fitting any drill press, hand drill, or machining center chuck rated for a 0.3680-inch straight shank.

Installation Notes

Secure the shank fully in the chuck before operation and verify runout before drilling production holes. Power down and lock out the drill press or machine spindle before changing bits. Use appropriate cutting fluid for ferrous metals to extend tool life and maintain hole quality. Inspect the split point for chipping or wear before reuse; a damaged point will cause oversized or off-center holes.