Chicago-latrobe 53903 5/32 Inch Hss Tin Drill Bit

Product Description

The CHICAGO-LATROBE 53903 is a heavy-duty jobber length drill bit designed for drilling into steel alloy and similarly hard ferrous materials. Built from high speed steel (HSS) with a titanium nitride (TiN) coating, the 53903 delivers extended tool life and reduced friction in high-cycle drilling applications. The bit measures 5/32 inch (0.1562 inch decimal) in diameter with a 3-1/8 inch overall length and a 2 inch flute length. A 135-degree split point reduces walking on entry without requiring a center punch. This bit is part of the Series 150DHT line and is suited for use by machinists, pipefitters, HVAC technicians, and other trades requiring precise, repeatable hole sizing in metal.

The 53903 is intended for right-hand cutting in steel alloy workpieces and fits standard drill chucks accepting a straight cylindrical shank. Its parabolic flute geometry promotes faster chip evacuation compared to standard flute profiles, making it well-suited for deeper holes and continuous production use. The web-thinned, tapered web configuration further reduces thrust force required at the cutting point. This bit is sold individually and is appropriate for both bench drill press and handheld drill driver applications common in trade and light industrial settings.

Key Features

• TiN coating extends surface hardness and reduces heat buildup during cutting
• 135-degree split point starts on contact without center punching
• Parabolic flute design accelerates chip removal in deep-hole drilling
• Web-thinned tapered web reduces feed force required at entry
• Straight cylindrical shank fits standard 3-jaw chucks without adapters
• Heavy-duty grade HSS construction rated for steel alloy primary workpiece material

Compatibility

Designed as an OEM-style replacement or direct addition for any application requiring a 5/32 inch straight-shank jobber length drill bit in standard drill press or handheld drill driver chucks.

Installation Notes

Installation and use should be performed by qualified machinists or trade professionals familiar with safe drilling practices. Ensure the drill chuck is fully tightened and the workpiece is securely clamped or fixtured before operation. Always wear appropriate eye protection and follow applicable OSHA and shop safety guidelines when operating rotating cutting tools. Do not exceed the rated speed range for the bit diameter and workpiece material combination.