Cleveland C71090 Jobber Length Drill Bit Letter T Hss

Product Description

The CLEVELAND C71090 is a jobber-length twist drill bit sized to letter T (0.3580 inches) and manufactured from high speed steel with an oxide finish. It features a 118-degree standard point angle, a 2-flute regular spiral configuration, and a web-thinned, tapered web for reduced thrust during entry. The straight-cylindrical shank measures 0.3580 inches in diameter and 1.375 inches in length. Overall length is 4.875 inches with a flute length of 3.5 inches. This bit is designed for general-purpose drilling and is installed by machinists, maintenance technicians, pipefitters, and general tradespeople working in fabrication or field service environments.

The C71090 is built for general-purpose drilling in a wide range of common materials. Its 4xD flute-to-diameter ratio and right-hand cut spiral flute geometry make it well suited to production drilling tasks in shop environments as well as on-site trade applications. The oxide coating provides basic lubricity and corrosion resistance during storage and use. This bit ships individually and is appropriate for use in standard drill presses, hand drills, and magnetic drill setups where a straight-shank bit is required.

Key Features

• Letter T size: 0.3580 inches decimal equivalent for precise hole sizing
• 118-degree standard point angle suitable for general-purpose drilling
• Web-thinned, tapered web reduces thrust and improves chip clearance
• Oxide-coated high speed steel construction for durability and basic lubricity
• Right-hand, 2-flute regular spiral for efficient chip evacuation
• Straight-cylindrical shank compatible with standard drill chucks

Compatibility

Designed as a general-purpose replacement or service drill bit for any application requiring a letter T straight-shank jobber-length bit; compatible with standard 3-jaw drill chucks accepting a 0.3580-inch shank diameter.

Installation Notes

Installation is performed by machinists or qualified tradespeople using a drill press, hand drill, or magnetic drill base equipped with a compatible chuck. Secure the shank fully in the chuck before operation and confirm chuck key is removed prior to starting. Appropriate cutting fluid or coolant should be applied based on workpiece material to extend bit life. Inspect the cutting edges and point condition before each use and replace the bit if chipping or excessive wear is observed.