Cleveland C16070 Taper Length Drill Bit Letter E 0.25 in Hss

Product Description

The CLEVELAND C16070 is a taper length, high speed steel (HSS) drill bit sized to Letter E (0.250 inches decimal) with a 118-degree notched point. Designed for production and maintenance drilling where a longer reach is required than a jobber-length bit provides, this bit features a parabolic flute geometry that improves chip evacuation and reduces heat buildup during cutting. The bright, uncoated finish suits general-purpose applications across a wide range of materials. Right-hand cutting action and a tanged shank keep the bit seated during aggressive feeds. It conforms to ASME B94.11M standards.

This drill bit is suited for machine shop, fabrication, and maintenance applications requiring a longer flute to reach deeper holes. The parabolic flute design performs well in softer metals, carbon steel, alloy steel, stainless steel, copper alloys, aluminum, and other non-ferrous metals. It is intended for use in drill presses, CNC machining centers, and hand-held equipment with appropriate chuck adapters. The taper length body gives additional clearance when drilling into recessed or deep-pocket features.

Key Features

• Letter E (0.250 inch) diameter with a tolerance of +0.0000 to -0.0007 inches
• 118-degree notched point for positive engagement and reduced walking
• Parabolic flute geometry for efficient chip removal in deep-hole drilling
• Web-thinned, tapered web design reduces thrust and improves penetration
• Bright, uncoated HSS construction — no coating to flake in high-heat applications
• Tanged shank provides positive drive and resists slippage in drill sleeves
• Conforms to ASME B94.11M dimensional standards

Compatibility

Designed as an OEM-style taper length drill bit compatible with standard drill sleeves, chucks, and spindles that accept a 0.250-inch tanged shank. Rated for use in alloy steel, aluminum, carbon steel, copper alloy, non-ferrous metal, and stainless steel applications.

Installation Notes

Installation and use should be performed by machinists or qualified trade personnel familiar with cutting tool setup and machine operation. Secure the bit fully in the chuck or drill sleeve before operation and verify runout is within acceptable limits. Power down and de-energize the machine before changing tooling. Do not exceed the recommended feed and speed parameters for the workpiece material and bit diameter.