Cleveland C70351 No 47 Hss Screw Machine Drill Bit

Product Description

The CLEVELAND C70351 is a wire gauge No. 47 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 and web-thinned geometry that reduces thrust and improves self-centering on contact. With an overall length of 1-11/16 inches and a 3/4-inch flute length, the short screw machine profile provides rigidity and reduced deflection in drill press, CNC turret, and automatic screw machine operations. The straight-cylindrical shank measures 0.0785 inches in diameter and seats securely in standard chucks and collets.

This bit is suited for drilling alloy steel and aluminum in tight-tolerance production environments. The screw machine length format makes it a common choice for turret lathes, multi-spindle machines, and bench drill presses where a standard jobber-length bit would be too long or too flexible. The 0.0785-inch decimal diameter corresponds to wire gauge No. 47, placing it in the small-diameter range appropriate for tapped hole prep, pilot holes, and precision clearance drilling in ferrous and non-ferrous workpieces.

Key Features

• Wire gauge No. 47 diameter — 0.0785 inches decimal equivalent
• 135-degree split point with web thinning reduces entry thrust and improves centering
• High-speed steel construction rated for heavy-duty service
• Screw machine length (1-11/16 inches OAL) provides rigidity in production setups
• Bright uncoated finish — suitable for use with cutting fluids on alloy and aluminum stock
• Meets ASME B94.11M and NAS 907 Type C specifications

Compatibility

Designed as an OEM-style replacement or standard production consumable for any setup requiring a wire gauge No. 47 screw machine length drill bit with a straight-cylindrical shank in standard chucks, collets, or turret tooling.

Installation Notes

Installation is performed by machinists and tool-and-die professionals in machine shop environments. Verify chuck or collet size matches the 0.0785-inch shank diameter before seating the bit. Power down and de-energize the machine before changing tooling per standard lockout/tagout procedure. At this diameter, use appropriate cutting fluid and controlled feed rates to avoid bit breakage — do not force-feed small-diameter bits.