Cle-line C18029 Jobber Drill Bit Letter a Hss

Product Description

The CLE-LINE C18029 is a letter-size A jobber-length drill bit designed for high-performance drilling in steel and cast iron. Built from high speed steel (HSS) with a black and gold oxide coating, it delivers durability and heat resistance in demanding shop and field applications. The 135-degree split point starts on contact without a center punch, reducing walking on hard surfaces. The web-thinned, tapered web configuration lowers thrust requirements and improves chip evacuation. At 3.875 inches overall length with a 2.625-inch flute length, this bit fits standard drill chucks and is suited for licensed machinists, millwrights, and trade professionals working with ferrous metals.

This drill bit is intended for use in steel and cast iron workpieces in both production and maintenance environments. The straight cylindrical shank with three flats seats securely in drill chucks and quick-change holders. The 0.2340-inch diameter corresponds to letter size A, making it a standard selection for tapping operations and close-tolerance hole work in metalworking applications. It carries no coolant-through capability, so it is best suited for conventional drilling setups with external cutting fluid or dry cutting where appropriate.

Key Features

• 135-degree split point for self-centering starts on steel and cast iron without center punching
• High speed steel construction with black and gold oxide coating for heat and wear resistance
• Web-thinned tapered web reduces thrust and improves chip flow
• Regular spiral flute with right-hand cutting for standard drill press and hand drill use
• Straight shank with three flats for positive chuck engagement and reduced slippage
• Meets ASME B94.11M and DIN 338 standards for jobber-length drill geometry

Compatibility

Designed as an OEM-style replacement or direct-use jobber drill bit for standard 3-jaw drill chucks and quick-change holders accepting a 0.2340-inch straight shank. Primary workpiece materials are steel and cast iron per Series 1878 specifications.

Installation Notes

Installation and use should be performed by qualified machinists or trade professionals familiar with drill press and hand drill safety practices. Secure the workpiece before drilling and confirm the chuck is tightened on the three-flat shank to prevent rotation. Apply appropriate cutting fluid when drilling ferrous metals to extend tool life and maintain hole tolerance. Follow shop safety protocols and applicable OSHA standards when operating rotating cutting tools.