Cleveland C70257 5/32 Inch Screw Machine Drill Bit Hss

Product Description

The CLEVELAND C70257 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, it features a 135-degree split point that reduces walking and cutting pressure on entry. The 5/32 inch (0.1562 inch decimal) diameter, web-thinned geometry, and right-hand spiral flutes make this a heavy-duty tool suited for production drilling environments. Machinists, maintenance technicians, and fabricators working with alloy steels and aluminum will find the bright uncoated finish and parallel web configuration well suited to high-volume, short-hole work.

This bit is intended for screw machine length applications where a shorter overall length provides added rigidity compared to jobber-length alternatives. The 2-1/16 inch overall length and 1 inch flute length make it appropriate for drilling shallow holes in metal workpieces including alloy steels and aluminum. Its straight cylindrical shank fits standard drill chucks and collet holders without modification, making it a practical choice for drill presses, CNC turrets, screw machines, and hand-held power drills in shop or field settings.

Key Features

• 135-degree split point reduces entry walking and lowers thrust required at cut initiation
• Web-thinned, parallel web construction improves chip evacuation and reduces heat buildup
• High-speed steel construction rated heavy duty for use in alloy steel and aluminum
• Bright uncoated finish — no coating to chip or flake in interrupted cuts
• Right-hand cut with regular spiral and 2 spiral flutes for consistent chip clearing
• Manufactured to ASME B94.11M and NAS 907 Type C specifications

Compatibility

Designed as an OEM-style screw machine length drill bit suitable for use with standard drill presses, CNC turrets, and screw machines accepting a straight cylindrical shank. Listed primary workpiece materials are alloy steel and aluminum.

Installation Notes

This bit is installed and serviced by machinists and maintenance technicians. Secure the shank fully in a drill chuck or collet before use and verify runout before beginning production runs. Never exceed the rated speed for the workpiece material or bit diameter. Wear appropriate PPE including eye protection when operating drilling equipment.