3/4″ x 5″ Square Tool Bit 8% Cobalt HSS M42 Lathe Turning Blank MPN 2000-0049

3/4″ x 5″ Square Tool Bit 8% Cobalt HSS M42 Lathe Turning Blank | MPN 2000-0049

3/4″ x 3/4″ x 5″ Square Tool Bit – 8% Cobalt M42 HSS (MPN: 2000-0049)

This listing is for a premium quality 3/4″ square tool bit blank, measuring 5 inches in length.

Unlike standard High-Speed Steel (M2), this bit is manufactured from M42 HSS with 8% Cobalt content. This addition of cobalt significantly increases the “red hardness” of the tool, allowing it to retain its cutting edge at higher temperatures and speeds.

Technical Specifications & Material Benefits

This tool bit is precision ground and ready to be shaped (ground) to your specific profile requirements.

• Dimensions: 3/4″ x 3/4″ x 5″ (Square)
• Material Grade: M42 (8% Cobalt)
• Hardness: Heat treated to Rockwell C 66-68
• MPN: 2000-0049
• Finish: Smooth Ground Finish

Why Upgrade to 8% Cobalt? Standard HSS bits can soften and fail when cutting tough materials or generating high heat. The 8% Cobalt alloy allows this tool to:

1. Cut Tougher Materials: Ideal for machining stainless steel, cast iron, high-carbon steel, and titanium.
2. Run Faster: Capable of handling higher cutting speeds compared to standard M2 HSS.
3. Last Longer: Superior wear resistance reduces the frequency of re-sharpening.

Common Applications

Because this is a blank tool bit, it offers maximum versatility for the machinist. It can be ground into various geometries for:

• Lathe Operations: Turning, facing, threading, grooving, and parting off.
• Milling: excellent for use in Fly Cutters for surfacing.
• Shapers & Planers: Suitable for heavy interrupted cuts.

Fabrication Note: This is a tool blank. The user is expected to grind the cutting geometry (rake, relief, nose radius) suitable for their specific application using a bench grinder.