Esko Kongsberg BIT‑AUS08‑8042‑76 (part number G42454561) is an 8 mm shank, single‑flute, up‑cut carbide milling/router bit optimized primarily for acrylic/PMMA and also used on foamed PVC/PS and similar rigid plastics on Kongsberg digital cutting tables.

Key specifications

• Part numbers:

  • Esko code: BIT‑AUS08‑8042‑76

  • Numeric: G42454561 (also shown as 42454561 in catalogs)

• Geometry: Up‑cut, single flute; “AUS” series = acrylic/super‑sharp bits.

• Shank diameter: 8 mm.

• Cutting diameter: 8 mm.

• Cutting length / max routing depth: 42 mm.

• Total length: 76 mm.

• Material: Tungsten carbide (solid carbide).

Intended materials and applications

Esko’s product data and tooling charts list this bit for:

• Acrylic panels / PMMA (e.g., Plexiglas, Perspex), typically in the 25–40 mm thickness range.

• Foamed PVC / PS (e.g., Forex, Sintra) and similar rigid plastic sheets.

The “AUS” (acrylic) designation means the cutting edges are polished and extra sharp to produce clean, chip‑free edges on acrylic, at the cost of being less wear‑resistant than multi‑purpose (MP) bits when used on abrasive composites or woods.

How it fits in the Kongsberg bit lineup

In Kongsberg’s routing catalog, BIT‑AUS08‑8042‑76 sits alongside similar 8 mm acrylic bits with different cutting lengths, e.g.:

• BIT‑AUS08‑8055‑90 (G42454579): 8 mm shank, 50 mm max depth, 90 mm total length for thicker acrylic.

• Multi‑Purpose (MP) bits: Higher wear resistance, used for aluminum composites, MDF, plywood, wood, and general plastics; not as “super‑sharp” on acrylic.