Cleveland C70332 Screw Machine Drill Bit Wire 28 Hss

Product Description

The CLEVELAND C70332 is a screw machine length drill bit designed for high-speed steel drilling in tight-clearance, production-oriented environments. Built to wire gauge size 28, the bit measures 0.1405 inches in diameter with a 135-degree split point that reduces walking and minimizes the need for center punching. At 1-15/16 inches overall length, the stub-length geometry provides rigidity and improved chip control compared to jobber-length alternatives. The two-flute, right-hand spiral design suits general-purpose hole-making in alloy steel and aluminum, and the bright uncoated finish makes it a solid choice for applications where coolant or lubrication is applied externally. This bit conforms to ASME B94.11M standards and meets NAS 907 Type C specification.

This drill bit is suited for production machining, CNC drilling, screw machine operations, and bench drill work where short, rigid tooling is preferred. Its stub-length body reduces deflection in shallow-hole applications and works well in drill presses, lathes, and hand-held pneumatic drills used in metalworking shops and fabrication environments. Primary target materials are aluminum and alloy steel. Machinists, tool and die workers, and production shop technicians handling repetitive drilling cycles will find this format practical for maintaining consistent hole quality at small diameters.

Key Features

• Wire gauge size 28 with 0.1405-inch decimal diameter and tolerance of +0.0000 to -0.0007 inches for precise hole sizing
• 135-degree split point reduces thrust force and eliminates walking on entry
• Screw machine (stub) length at 1-15/16 inches overall for maximum rigidity in short-reach applications
• High-speed steel construction rated heavy duty for intermittent production use
• Web-thinned, parallel web configuration improves chip evacuation in aluminum and alloy materials
• Meets ASME B94.11M and NAS 907 Type C specification

Compatibility

Designed as an OEM-style replacement or standard supply drill bit for screw machine, CNC, and bench drill applications requiring wire-gauge tooling in high-speed steel at the 0.1405-inch diameter range.

Installation Notes

Installation is performed by machinists or tooling technicians in machine shop environments. Secure the straight-cylindrical shank fully in the chuck or collet before operation, ensuring concentricity to avoid runout at this small diameter. Power down and lock out any machine before changing tooling. Coolant-through is not supported on this bit; apply cutting fluid externally when drilling alloy steel to extend tool life.