Cleveland C70256 Screw Machine Drill Bit 9/64 in Hss

Product Description

The CLEVELAND C70256 is a screw machine length drill bit designed for high-speed steel cutting in tight-clearance drilling applications. Built to ASME B94.11M and NAS 907 Type C standards, this bit features a 135-degree split point that reduces walking and cuts through material with less feed pressure than a conventional 118-degree point. The straight-cylindrical shank measures 0.1406 inches in diameter and fits standard drill chucks. At 1-15/16 inches overall length, this short-series geometry delivers increased rigidity and precision in screw machine and CNC drill press setups. The bright uncoated finish is appropriate for a wide range of metalworking applications.

This drill bit is suited for drilling alloy steel and aluminum in production environments where a short, stiff tool is required to minimize deflection and maintain hole location. Screw machine length bits are commonly used in automatic screw machines, drill presses, and machining centers where depth of cut is limited and rigidity is prioritized. The web-thinned parallel web configuration reduces thrust load, making this bit well-suited for volume drilling operations in light to medium production runs. It is sold individually but requires a minimum order of 12 units.

Key Features

• 135-degree split point reduces bit walking and lowers feed pressure at entry
• Web-thinned parallel web reduces axial thrust during drilling
• Screw machine (stub) length provides extra rigidity over jobber-length bits
• High-speed steel construction handles alloy steel and aluminum workpieces
• Bright uncoated finish suits general-purpose metalworking without coating compatibility concerns
• Meets ASME B94.11M and NAS 907 Type C specifications

Compatibility

Designed for use with standard straight-shank drill chucks in screw machines, CNC machining centers, and bench drill presses. Rated for alloy steel and aluminum workpieces per manufacturer specification.

Installation Notes

Install into a compatible straight-shank chuck and tighten securely before operating. Ensure the drill press or machine spindle is at a full stop before changing bits. Use appropriate cutting fluid when drilling alloy steel to extend tool life and maintain hole tolerance. Inspect the cutting edges and web for wear before each production run.