Hertel 2386621 Screw Machine Drill Bit Size 55 Hss

Product Description

The HERTEL 2386621 is a screw machine length drill bit designed for high-speed, close-tolerance drilling in metal fabrication, machining, and production environments. Built from high-speed steel with an oxide coating, this bit measures 0.0520 inches in diameter (Wire Size 55) with an overall length of 1.625 inches. The 135-degree split point reduces walking on entry and requires less feed pressure than a standard 118-degree point. The shortened flute and overall length give this bit added rigidity compared to jobber-length equivalents, making it well-suited for use in drill presses, CNC turret machines, and screw machines where stability and repeatability matter.

This bit is used in machine shop, production drilling, and light metalworking applications. The straight-cylindrical shank fits standard drill chucks and collets without modification. The right-hand spiral flute efficiently evacuates chips during through-hole and blind-hole operations in ferrous and non-ferrous materials. The parallel web configuration with web thinning reduces cutting resistance at the center of the drill, improving performance in harder materials. Sold individually, with a minimum order quantity of 12 units per order.

Key Features

• Wire Size 55 diameter at 0.0520 inches for precision small-diameter drilling
• 135-degree split point reduces thrust and prevents bit walking on entry
• High-speed steel construction with oxide coating for corrosion resistance and lubricity
• Screw machine length (1.625 inches OAL) provides greater rigidity than jobber-length bits
• Web-thinned parallel web lowers cutting resistance in tough materials
• Right-hand spiral flute for efficient chip evacuation

Compatibility

Designed as an OEM-style replacement or stock drill bit for use in standard drill chucks and collets accepting a 0.0520-inch straight-cylindrical shank, commonly found in screw machines, CNC turret presses, and benchtop drill presses.

Installation Notes

Installation and use should be performed by a qualified machinist or tooling technician. Ensure the drill chuck or collet is properly tightened and the workpiece is securely fixtured before operation. Always verify spindle speed is appropriate for the material and drill diameter before starting the cut. Inspect the cutting edges for wear or chipping before each use, as small-diameter bits are susceptible to breakage under side load or misalignment.