Cle-line C74057 Jobber Drill Bit 13mm Hss Split Point

Product Description

The CLE-LINE C74057 is a high-speed steel jobber-length drill bit designed for production and maintenance drilling in steel and cast iron. It measures 13.00 mm (0.5100 inch) in diameter with an overall length of 5.9400 inches and a flute length of 3.9800 inches. The 135-degree split point self-centers on contact, reducing walking and the need for a center punch. A black oxide and gold coating improves lubricity and surface hardness. Built to Series 1878 standards and conforming to ASME B94.11M and DIN 338, this bit is suited for heavy-duty shop and field use by machinists, pipefitters, and general maintenance technicians.

This drill bit is intended for right-hand rotation in standard drill presses, magnetic base drills, and handheld power drills. Primary workpiece materials are steel and cast iron, making it a practical choice for structural fabrication, pipe work, and equipment repair. The straight cylindrical shank with three flats accommodates most standard three-jaw chucks and quick-change systems. Maximum drilling depth is rated at 1.2800 inches, appropriate for through-hole and shallow blind-hole work in trade applications.

Key Features

• 135-degree split point self-centers and reduces thrust load on entry
• High-speed steel construction with black oxide and gold coating for improved wear resistance
• Regular spiral flute geometry promotes chip evacuation in ferrous materials
• Tapered web configuration adds core strength for heavy-duty drilling
• Straight shank with three flats reduces slippage in chuck under load
• Conforms to ASME B94.11M and DIN 338 dimensional standards

Compatibility

Designed as an OEM-style replacement or direct-use jobber drill bit for standard three-jaw chucks and compatible quick-change systems accepting a 0.5100-inch straight shank, suitable for drill presses and handheld power drills used in steel and cast iron applications.

Installation Notes

Installation is performed by machinists and maintenance technicians using standard drill press or handheld drilling equipment. Secure the shank fully in the chuck and confirm tightness before operation. Always wear appropriate eye protection and secure the workpiece before drilling. Reduce feed rate when breaking through the far side of the material to prevent grab and bit damage.