1. Soft Non-Ferrous Metals (Top Recommended)

• Aluminum alloy, pure aluminum, aluminum extrusion
• Copper, brass, bronze
• Magnesium alloy

  Why: Coatings tend to stick and form built-up edge (BUE) on soft aluminum. Uncoated smooth carbide edges stop chip adhesion, eliminate sticky burrs and get clean cutting surfaces. Corn tooth flutes evacuate soft long chips perfectly without clogging.

2. Soft Plastics & Light Composites

• PVC, PP, ABS, acrylic, POM, nylon
• Soft foam plastic, light resin boards
• Unfilled carbon fiber prepreg, low-filler fiberglass sheets

  Why: Hard coating particles may scratch soft plastic surfaces. Uncoated tools deliver smooth, chip-free edges without melting or fraying workpiece edges during routing and grooving.

3. Wood & Wood-Based Panels

• Solid wood, MDF, plywood, particle board
• Bamboo, composite timber, decorative wood panels

  Why: Uncoated carbide resists resin and wood sap buildup better than coated variants; sharp serrated teeth cut clean without burning wooden surfaces at medium spindle speeds.

4. Low-Abrasion Light Composites

• Glass fiber plastic with less than 10% filler content
• Light honeycomb core panels (aluminum honeycomb, paper honeycomb)

  Why: Low abrasive filler will not rapidly wear bare carbide. Heavy glass/carbon filler will quickly abrade uncoated tools—use diamond coating instead for high-filler composites.

5. Delicate Low-Temperature Machining Jobs