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Zund R42 3910735 Single-Flute CNC Router Bit

The Zund R42 3910735 is a single-flute router bit designed for compatible Zund CNC routing systems. It features a 3 mm cutting diameter, 3 mm shank and 6 mm maximum routing depth. Suitable for routing selected rigid sheet materials, including acrylic, aluminum alloy, ACM and polycarbonate, when used with compatible tooling and appropriate cutting parameters.

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Description
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Zund R42 3910735 Single-Flute CNC Router Bit

Specifications & Dimensions

Item Number: 3910735 (Zünd)
Shank Diameter: 3 mm
Routing / Cutting Diameter: 3 mm
Tool / Total Length: 38 mm
Maximum Cutting / Routing Depth: 6 mm

Recommended Materials

Acrylic (PMMA)
Aluminum / Aluminum Alloy / ACM (Aluminium Composite Material)
Polycarbonate (PC) / Rigid plastics

Key Features

Balances clean material evacuation with structural stability when milling dense or melt-prone rigid boards up to 6 mm thick.

Right-hand twist

Recommended Materials
The R42 bit is optimized to balance clean material evacuation with structural stability when processing dense or prone-to-melt materials up to 6mm thick:
Aluminum Composite Material (ACM / Dibond)
Aluminum Alloys and thin sheet metals
Polycarbonate (PC)
Acrylic (PMMA / Plexiglass)

Operational Advantages
Because of its single-flute up-cut spiral geometry, the R42 provides rapid upward chip clearance. At spindle speeds reaching 80,000 RPM, it quickly forces debris away from the cutting channel. This rapid chip extraction effectively cools the tool tip, prevents rigid plastics from melting back into the seam, and keeps the edge profile entirely clean.

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