Materia: Solid tungsten carbide (carbide-tipped for high hardness and durability).
Application: Milling, routing, engraving, pocketing, and contour cutting.
Compatibility: Zund S3 / G3 cutting machines with router modules (RM-120, RM-320, etc.).
Features:
High wear resistance.
Clean edge finish.
Suitable for high-speed routing.
Long tool life compared to HSS bits.
R-Series Router Bits
1. R43
Type: Single flute carbide router bit.
Use: Plastics (acrylic, PVC, PE, PP), composites, and soft aluminum.
Advantage: Fast chip removal, reduced heat build-up.
2. R71
Type: Up-cut spiral bit.
Use: Wood, MDF, particle board, foam board.
Advantage: Strong upward chip evacuation, smooth edges.
3. R72
Type: Down-cut spiral bit.
Use: Laminates, coated boards, composites.
Advantage: Prevents top-surface chipping, clean top edges.
4.R75
Type: Compression spiral bit (up & down cut combination).
Use: Laminated panels, plywood, MDF, composites.
Advantage: Chip-free top & bottom surfaces, ideal for double-sided laminates.
Typical Materials Cut
Plastics (Acrylic, PVC, Polycarbonate)
Wood (MDF, Plywood, Chipboard)
Composites (Carbon fiber, GFRP)
Aluminum & non-ferrous metals (light routing)
Foam, rubber, layered materials
Here’s a clear comparison table for Zund R-series router bits (R43, R71, R72, R75) with focus on cutting material, flute type, and finish quality:
| Router Bit Model | Typical Cutting Materials | Flute Type | Finish Quality |
| ---------------- | ---------------------------------------------------- | -------------------------------------- | ------------------------------------------------------------------------------- |
| R43 | Plastics, acrylic, composite panels, aluminum (thin) | Single flute (up-cut) | Smooth edge, good for fast cutting, minimal burrs |
| R71 | Wood, MDF, foam board, softer composites |Double flute(spiral) | Cleaner edge than single flute, balanced between speed and finish |
| R72 | Aluminum, non-ferrous metals, harder plastics | Single flute (up-cut, polished) | High-quality edge on metals, reduces chip welding, very smooth |
| R75 | High-density materials, composites, harder plastics | Double flute (up/down compression) | Excellent surface finish on both sides, best for laminated or layered materials |
R43 → General-purpose, fast cutting.
R71 → Balanced wood/composite cutter with clean finish.
R72 → Optimized for metals & hard plastics, superior polished finish.
R75→ Best finish quality on layered/laminated materials.
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