Spiral router bit for acrylic & plastics with low helix VHM Z1 D3,18 I7,9 L63,5 S3,17 RH Finishing positive

Monobloc single-edged VHM spiral end mill for PLEXI with upward chip evacuation – clean lower edge and efficient chip removal

Index: ST28.32.794.635.32R

Industrial monobloc single-edged spiral end mill made of sintered carbide (VHM) with positive geometry (upward chip evacuation). The tool features a small helix angle, which effectively prevents lifting and vibration of the processed material. It performs excellently in precise cutting as well as edge joining and levelling of thin materials with thicknesses from 1 mm to 8 mm on CNC machines and overhead milling machines. The finishing geometry with a single cutting edge (Z1) combined with a polished flute prevents chip sticking and melting. The ground shank with H6 accuracy class eliminates radial runout, protecting the machine's drive system and ensuring processing stability.

Construction advantages and technical properties:

• Dedicated to thin materials (1–8 mm): Reduced spiral eliminates upward pulling forces, preventing the lifting of flimsy sheets.
• Single-edged Z1 (positive) design: The single cutting edge enables efficient chip evacuation, minimising friction and the risk of overheating the material.
• Polished flute: The mirror-like flute surface prevents sticking and the re-welding of chips to the tool body.
• Finishing geometry of the blade: Precisely ground edge guarantees perfect edge quality without fraying.
• Low shank roughness (Ra ≤ 0.3 µm): The ground surface of the shank prevents slipping in the holder and protects the spindle taper from wear.
• Dynamic balancing class G2.5: Balancing in accordance with ISO standards ensures vibration-free operation at very high speeds.

Intended use and application range:

The tool is designed for cutting operations and edge joining and levelling in thin sheets of plastic on CNC machining centres.

Used in the processing of materials such as: PLEXI (acrylic), plastics, ALUCOBOND® panels, ALUCOBOND® A2, and composites like CORIAN® and HPL.