Value Collection 01370162 Letter E Cobalt Drill Bit

Product Description

The VALUE COLLECTION 01370162 is a screw machine length cobalt drill bit sized at Letter E (0.2500 inches decimal equivalent) with a 135-degree split point. Screw machine length bits are shorter than jobber-length bits, providing greater rigidity and reduced deflection when drilling in confined spaces or on a drill press. The cobalt construction handles harder workpiece materials and elevated cutting temperatures that would degrade standard high-speed steel tooling. A straw finish indicates heat treatment that contributes to surface hardness. The two-flute regular spiral design clears chips efficiently. This bit is suited for metalworking, fabrication, and maintenance applications where accuracy and tool life in tough materials are priorities.

This drill bit is appropriate for use in machine shop, manufacturing, and field maintenance environments. Its screw machine length format makes it well-suited for turret lathes, drill presses, and CNC setups where a short, stiff cutting tool reduces runout. The 135-degree split point geometry self-centers on contact, eliminating the need for a center punch on most metal surfaces. Right-hand cutting direction is standard for conventional rotating spindles. Typical users include machinists, tool and die makers, millwrights, and maintenance technicians working with ferrous and non-ferrous metals including stainless steel, cast iron, and high-alloy steels.

Key Features

• Letter E size at 0.2500 inches decimal equivalent for precise hole sizing
• 135-degree split point self-centers on contact, reducing walking on hard surfaces
• Cobalt construction resists heat buildup when drilling hard or abrasive metals
• Screw machine length body provides increased rigidity and reduced deflection vs. jobber-length bits
• Two-flute regular spiral design promotes efficient chip evacuation
• Straw finish from heat treatment adds surface hardness for extended tool life
• Straight shank compatible with standard drill chucks and collets

Compatibility

Designed as a standard screw machine length drill bit with a straight shank, compatible with conventional drill chucks and collet systems on drill presses, turret lathes, hand drills, and CNC machining centers accepting a 0.2500-inch shank diameter.

Installation Notes

Installation and use should be performed by machinists or qualified trade technicians following standard machine tool safety practices. Secure the workpiece firmly before drilling and confirm spindle speed is appropriate for the material and bit diameter. Cutting fluid or coolant is recommended when drilling ferrous metals to extend bit life, even though this bit does not support through-coolant delivery. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.