Cle-line C97313 Jobber Drill Bit Letter E 1/4 in Hss Tin

Product Description

The CLE-LINE C97313 is a jobber-length twist drill bit sized at letter E, equivalent to 0.2500 inches (1/4 inches), designed for general-purpose drilling in metal, wood, and plastics. Built from high speed steel with a TiN (titanium nitride) tip coating, the bit delivers improved wear resistance and extended cutting life compared to uncoated HSS tooling. The 118-degree split-point tip starts on contact without a center punch and reduces walking on smooth surfaces. With an overall length of 4.0000 inches and a 2.7500-inch spiral flute, this bit is suited for production and maintenance drilling in shop and field environments. It is installed and used by machinists, pipefitters, electricians, and general trade technicians.

The C97313 is intended for right-hand, spiral-flute drilling applications where a straight-cylindrical shank is required. The 1/4-inch shank diameter fits standard three-jaw drill chucks and quick-change chuck systems found on hand drills, drill presses, and magnetic base drills. A flute-to-diameter ratio of 3xD and a tapered web configuration support chip evacuation in shallow to moderate-depth holes. The bit is rated for a maximum drilling depth of 0.6300 inches per pass in its intended application range. This series is sold individually per package with a minimum order quantity of 12 units, making it practical for stocking tool cribs and service vehicles.

Key Features

• Letter E size (0.2500 inches decimal, 1/4 inches fractional) with tight diameter tolerance of +0.0000 to -0.0007 inches per ASME B94.11M
• TiN tip coating increases surface hardness and reduces friction at the cutting edge for longer tool life
• 118-degree split-point tip for self-starting cuts and reduced thrust on entry
• Regular spiral flute with tapered web promotes reliable chip evacuation in through and blind holes
• Straight-cylindrical 1/4-inch shank fits standard drill chucks without adapters
• Meets ASME B94.11M and ANSI specification designation for dimensional consistency

Compatibility

Designed as a general-purpose jobber-length drill bit for use in any drill press, hand drill, or similar rotary tool equipped with a chuck that accepts a 0.2500-inch straight-cylindrical shank. Compatible with standard three-jaw chucks and quick-change chuck systems across common tool brands.

Installation Notes

This bit is installed by machinists, maintenance technicians, electricians, and plumbers using standard drill chucks. Ensure the chuck is fully tightened around the shank before operating the drill. Secure the workpiece with a clamp or vise before starting a cut. Never exceed the rated drilling depth per pass, and back the bit out periodically on deeper holes to clear chips and prevent heat buildup.