Precision Twist Drill 5995667 Cobalt Drill Bit Set 60pc

Product Description

The PRECISION TWIST DRILL 5995667 is a 60-piece cobalt screw machine length drill bit set built for metalworking and heavy-duty drilling applications. Each bit in this set is manufactured from M41CO-series cobalt high-speed steel and features a 135-degree split-point tip that reduces walking on startup and cuts through hard materials without a center punch. The gold finish indicates the cobalt alloy content and provides a visual reference for heat resistance. The straight shank design fits standard drill chucks. Wire sizes range from number 60 through number 1, covering the full wire gauge spectrum in a single indexed case.

This set is intended for professional metalworking environments including fabrication shops, maintenance and repair operations, and production settings where a full range of wire gauge drill sizes is needed in one organized unit. The screw machine length geometry provides a shorter, stiffer bit profile compared to jobber-length bits, making these well-suited for use in drill presses, CNC equipment, and turret lathes where reduced deflection and improved accuracy matter. The set is also viable for multipurpose drilling tasks on hard steel, stainless, cast iron, and similar ferrous materials.

Key Features

• 60-piece set covers the complete wire gauge range from number 60 to number 1
• M41CO-series cobalt high-speed steel construction for heavy-duty metalworking performance
• 135-degree split-point tip reduces walking and improves chip evacuation
• Screw machine length profile provides increased rigidity and reduced deflection versus jobber-length bits
• Straight shank fits standard drill chucks without adapters
• Gold finish indicates cobalt alloy content; bits stored in a metal indexed case
• Conforms to ANSI standards

Compatibility

Designed for use in standard straight-shank drill chucks on drill presses, hand drills, turret lathes, and CNC drilling equipment used in metalworking and multipurpose drilling applications.

Installation Notes

Installation of drill bits should be performed by qualified machinists or trades professionals following applicable shop safety procedures. Secure the bit fully in the chuck and verify concentricity before operation. Always wear appropriate eye protection and ensure the workpiece is properly clamped before drilling. For cobalt bits used on hard alloys, apply cutting fluid to extend bit life and reduce heat buildup.