Chicago-latrobe 50303 Taper Length Drill Bit 0.1850 in

Product Description

The CHICAGO-LATROBE 50303 is a taper length, straight-shank drill bit designed for production and maintenance drilling in ferrous metals. Ground from high speed steel (HSS) with an oxide finish, it carries a 118-degree standard point angle and a web-thinned, tapered web configuration that reduces thrust at entry. The 0.1850-inch diameter corresponds to wire gauge size 13. Flute length runs 3.375 inches with an overall length of 5.75 inches, giving the bit extra reach compared to a jobber-length equivalent without sacrificing rigidity. A right-hand spiral flute clears chips efficiently during through-hole work. This bit is sold individually and is intended for use by machinists, maintenance mechanics, and metal fabricators.

The 50303 is suited for drilling alloy steel, carbon steel, and cast iron in both job-shop and industrial maintenance settings. The taper length geometry is a common choice when a standard jobber bit lacks the reach to clear a deep boss or fixture plate without repositioning. It fits any drill press, mill, or handheld drill with a straight-shank chuck sized for 0.1850-inch stock. The Series 120 designation places it in Chicago-Latrobe's general-purpose HSS line, making it a straightforward replacement for worn or broken bits of the same wire gauge and length class.

Key Features

• 0.1850-inch diameter — wire gauge size 13 — with a tight tolerance of +0.0000 to -0.0007 inches
• High speed steel construction with oxide finish for surface hardness and mild corrosion resistance
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• Taper length body: 3.375-inch flute length, 5.75-inch overall length for extended reach
• Right-hand regular spiral flute for efficient chip evacuation in ferrous materials
• Straight shank — fits standard drill chucks without an adapter

Compatibility

Designed as a general-purpose taper length drill bit for drilling alloy steel, carbon steel, and cast iron. Fits any standard straight-shank chuck accepting 0.1850-inch tooling.

Installation Notes

This bit is installed and used by machinists and metal fabricators operating drill presses, knee mills, or handheld power drills. Secure the straight shank firmly in a properly sized chuck before operation and verify runout before drilling production holes. Use cutting fluid appropriate for the workpiece material to extend tool life and maintain diameter tolerance. Inspect the point and cutting edges before each use — a chipped or dull web-thinned point will increase thrust and can cause the bit to walk off center.