Spiral router bit for acrylic & plastics with low helix VHM Z1 D4 I12 L60 S4 RH Finishing positive

Single-edged spiral end mill VHM for PLEXI with upward chip removal – clean bottom edge and efficient chip evacuation

Index: ST28.04.012.060.04R

Industrial single-edged spiral end mill made from solid carbide (VHM) with positive geometry (chip removal upwards). The tool is equipped with a small helix angle which effectively prevents lifting and vibrations of the workpiece. It excels in precision cutting, edge joining, and levelling of thin materials with a thickness from 1 mm to 8 mm on CNC machines and overhead-spindle milling machines. The finishing geometry with a single cutting edge (Z1) combined with a polished flute prevents chip sticking and melting. The ground shank in accuracy class H6 eliminates radial runout, protecting the machine's drive system and ensuring machining stability.

Design advantages and technical properties:

• Dedicated to thin materials (1–8 mm): Reduced spiral eliminates upward pulling forces, preventing lifting of flimsy sheets.
• Single-edged design Z1 (positive): The single cutting edge allows for efficient chip removal, minimizing friction and the risk of overheating the material.
• Polished flute: The mirror finish of the spiral prevents chip sticking and re-welding of chips to the tool body.
• Finishing edge geometry: Precisely ground edge ensures 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 in class G2.5: Balancing according to ISO standards guarantees vibration-free operation at very high speeds.

Intended use and scope of application:

The tool is intended for cutting operations as well as edge joining and levelling of thin plastic sheets on CNC machining centres.

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