Cleveland C09678 Extra Length Drill Bit 0.4531 in Hss

Product Description

The CLEVELAND C09678 is an extra length, high-speed steel twist drill bit engineered for deeper drilling and long-reach applications where standard-length bits fall short. Built to Series 950E specifications, it features a 0.4531-inch diameter, an 8-inch overall length, and a 118-degree standard point angle with web thinning for improved penetration and reduced thrust. The oxide finish provides baseline corrosion resistance and helps retain cutting fluid at the surface. This bit is sized for use in drill presses, milling machines, and hand-held power tools where extended reach into a workpiece is required. Licensed machinists, pipefitters, and maintenance technicians are the primary users.

This bit is suited for production and maintenance drilling in ferrous materials, specifically cast iron and steel, where a standard jobber-length bit cannot reach the required depth or where clearance above the workpiece is limited. The straight-cylindrical shank with a 29/64-inch diameter fits standard drill chucks without modification. Right-hand spiral flutes evacuate chips efficiently during deep-bore operations, reducing heat buildup and chip packing in long-hole applications.

Key Features

• Extra length design: 8-inch OAL and 5.5-inch flute length for deep-hole and long-reach drilling
• High-speed steel construction rated for cast iron and steel workpieces
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• Oxide finish for surface protection and improved lubrication retention
• Right-hand, regular spiral flutes promote efficient chip evacuation in deep bores
• Diameter tolerance held to +0.0000 to -0.0010 inches for consistent hole sizing

Compatibility

Designed for use in standard drill chucks accepting a straight-cylindrical shank; primary workpiece materials are cast iron and steel. Conforms to ASME B94.11M and ANSI standards.

Installation Notes

This bit is installed by machinists and maintenance technicians using drill presses, lathes, or hand-held power drills. Secure the straight shank fully in the chuck and verify concentricity before starting the cut. Apply cutting fluid appropriate for the workpiece material to manage heat during deep-bore passes. Disconnect or lock out power to the machine before changing or inspecting bits.