Cleveland C70307 Screw Machine Drill Bit Wire 3 Hss

Product Description

The CLEVELAND C70307 is a screw machine length drill bit designed for high-production drilling in metal fabrication and machining applications. Built from high-speed steel with a bright/uncoated finish, this bit features a 135-degree split point that reduces walking and allows drilling without a center punch. The web-thinned construction lowers thrust requirements and improves chip evacuation. At 2.375 inches overall length with a 1.25-inch flute length, the compact screw machine profile fits standard drill chucks and short-travel drilling heads where standard-length bits would interfere.

This drill bit is suited for drilling alloy steel and aluminum in CNC machining centers, drill presses, and hand-held power tools where short overall length improves rigidity and reduces deflection. The 0.2130-inch diameter corresponds to wire gauge size 3. Its heavy-duty grade and parallel web configuration make it a reliable choice for repetitive hole production in shop and field environments. Typical users include machinists, maintenance technicians, and fabricators working to close-tolerance hole specifications.

Key Features

• 135-degree split point reduces drill walking and lowers entry thrust on alloy steel and aluminum
• Web-thinned, parallel web design improves chip flow and reduces heat buildup
• High-speed steel construction provides durability across a broad range of metalworking applications
• Screw machine length (2.375 inches OAL) increases rigidity and reduces deflection in short-travel setups
• Right-hand cut with straight-cylindrical shank fits standard drill chucks without adapters
• Diameter tolerance of +0.0000 to -0.0007 inches supports consistent, repeatable hole sizing
• Meets ASME B94.11M and NAS 907 Type C specifications

Compatibility

Designed as a replacement or production-stock screw machine drill bit for drilling alloy steel and aluminum; compatible with any drill chuck accepting a 0.2130-inch straight-cylindrical shank, including standard drill presses, CNC machining centers, and hand-held power tools.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or trade technicians familiar with cutting tool safety. Ensure the drill chuck is fully tightened and the workpiece is securely clamped before beginning drilling. Use appropriate cutting fluid or coolant for the workpiece material to extend tool life, even though the bit does not have through-coolant capability. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.