Chicago-latrobe 53921 7/16 Inch Hss Tin Drill Bit

Product Description

The CHICAGO-LATROBE 53921 is a heavy-duty jobber length drill bit designed for production drilling in steel alloy and similar ferrous materials. Built from high speed steel with a titanium nitride (TiN) coating, it delivers extended tool life compared to uncoated HSS bits. The 135-degree split point starts on contact without a center punch and reduces walking on flat surfaces. The parabolic flute geometry improves chip evacuation, which matters most when drilling deeper holes or gummy materials. At 5.5 inches overall length with a 4.0625-inch flute, this bit fits standard drill chucks and magnetic drill presses used in HVAC, plumbing, and mechanical trades.

This bit is suited for drilling steel alloy in fabrication, layout, and field service applications. Typical use cases include drilling sheet metal framing, structural steel, equipment mounting plates, and pipe hangers. The straight cylindrical shank seats securely in 3-jaw chucks and compatible quick-change holders. The web-thinned, tapered web design reduces thrust requirements at depth, making it practical for handheld drilling operations where feed pressure must be controlled manually.

Key Features

• 135-degree split point starts on contact, no center punch required
• TiN coating extends tool life and reduces heat buildup at the cutting edge
• Parabolic flute design accelerates chip evacuation in deep-hole drilling
• Web-thinned tapered web reduces axial thrust, easing handheld use
• Straight cylindrical shank fits standard 3-jaw chucks and quick-change systems
• Heavy-duty grade construction rated for steel alloy primary workpiece material

Compatibility

Designed as an OEM-style jobber length drill bit for use in standard drill chucks and compatible quick-change holding systems accepting a 0.4375-inch straight cylindrical shank.

Installation Notes

Installation and use should be performed by qualified tradespeople familiar with metal drilling operations. Always secure the workpiece before drilling and confirm the chuck is fully tightened before applying power. Use appropriate cutting fluid or lubricant when drilling steel alloy to manage heat and extend bit life. Inspect the cutting edges for wear before each use and replace the bit if the TiN coating is worn through at the tip.