Seco 63006939 Cobalt Tool Bit Blank 5/16x1/2x6 Inch WKE45

Product Description

The SECO 63006939 is a rectangular cobalt tool bit blank ground to a 5/16 inch width and 1/2 inch height with a 6 inch overall length. Manufactured from WKE45-grade cobalt high-speed steel, this blank is supplied unground on the cutting end, allowing machinists and tool grinders to profile custom cutting geometries to suit a specific turning, boring, or form-tool application. The WKE45 cobalt grade offers elevated hot hardness and wear resistance compared to standard M2 high-speed steel, making it well suited for harder workpiece materials and interrupted cuts where tool life is a priority.

This tool bit blank is intended for use in manual lathes, turret lathes, and screw machines where the operator or tool room grinds their own tooling to a desired profile. It fits standard tool holders and tool posts sized for 5/16 inch by 1/2 inch shank blanks. Typical applications include single-point turning tools, threading tools, parting tools, and form tools produced in-house. Sold individually, this blank is appropriate for job shops, tool rooms, and maintenance machining environments where custom ground tooling is routinely required.

Key Features

• WKE45 cobalt high-speed steel grade provides superior hot hardness and wear resistance over standard HSS
• Rectangular cross-section at 5/16 inch wide by 1/2 inch high suits common tool post and holder slots
• 6 inch overall length allows for multiple regrinds, extending the usable life of each blank
• Unground cutting end accepts custom profiles ground by the end user to match specific machining requirements
• Solid cobalt construction throughout — no brazed tip or insert — for consistent regrinding performance

Compatibility

Designed as an OEM-style replacement or stock blank for manual lathes, turret lathes, and screw machines accepting 5/16 inch by 1/2 inch rectangular tool bit blanks.

Installation Notes

Tool bit blanks must be ground to the required cutting geometry by a qualified machinist or tool grinder before use. Use appropriate personal protective equipment, including eye protection and heat-resistant gloves, when grinding cobalt high-speed steel. Ensure the grinding wheel is rated for high-speed steel materials and that the blank is kept cool during grinding to prevent annealing the cutting edge. Secure the ground tool properly in the tool post or holder before operating any lathe or machine tool.