Cle-line C74020 Jobber Drill Bit 10.50mm Hss Split Point

Product Description

The CLE-LINE C74020 is a heavy-duty high-speed steel (HSS) jobber-length drill bit sized at 10.50 mm (0.4100 inches) in diameter with a 135-degree split point. The black oxide and gold coating reduces friction and helps resist heat buildup during cutting. At 5.2400 inches overall length with a 3.4300-inch flute, this bit is designed for production and general-purpose drilling in steel and cast iron. It is sold individually and suited for use in drill presses, CNC machining centers, and hand-held power drills by machinists, pipefitters, ironworkers, and maintenance mechanics.

This jobber drill is intended for drilling into steel and cast iron in both industrial and commercial maintenance settings. The straight cylindrical shank with three flats fits standard drill chucks securely. The regular spiral flute and tapered web configuration promote chip evacuation in moderate-depth holes. Typical applications include structural steel fabrication, mechanical assembly, and general metalworking where consistent hole diameter tolerance is required.

Key Features

• 135-degree split point for self-centering and reduced thrust - no pilot hole required
• High-speed steel construction rated for heavy-duty grade drilling
• Black oxide and gold coating for reduced friction and heat resistance
• Right-hand cutting, regular spiral flute for effective chip removal
• Tapered web with 3xD flute-to-diameter ratio for rigidity in deeper cuts
• Straight shank with three flats for positive chuck engagement
• Diameter tolerance of +0.0000 to -0.0010 inches for consistent hole sizing

Compatibility

Designed as an OEM-style heavy-duty replacement or direct-use jobber drill bit for applications requiring a 10.50 mm straight-shank HSS drill in steel and cast iron workpieces, conforming to DIN specification.

Installation Notes

Install into a keyed or keyless drill chuck, tightening securely against all three shank flats to prevent slippage under load. Ensure the drilling machine is powered off and fully stopped before inserting or removing the bit. Use appropriate cutting fluid or coolant when drilling steel or cast iron to extend bit life and maintain hole tolerance. Follow applicable OSHA machine guarding requirements when operating drill presses or CNC equipment.