Spiral router bit for acrylic & plastics with low helix VHM Z1 D6,35 I25,4 L63,5 S6,35 RH Finishing positive

Single-Edge Spiral Cutter VHM for PLEXI with Upward Chip Evacuation – Clean Bottom Edge and Efficient Chip Removal

Index: ST28.64.254.635.64R

Industrial single-edge spiral cutter made from solid sintered carbide (VHM) with positive geometry (upward chip evacuation). The tool features a small incline angle of the helical flute, which effectively prevents lifting and vibrations of the machined material. It works excellently for precision cutting as well as for welding and levelling edges of thin materials with thicknesses from 1 mm to 8 mm on CNC machines and vertical milling machines. The finishing geometry with a single edge (Z1) combined with a polished chip flute prevents chip sticking and melting. The ground shank in accuracy class H6 eliminates radial runout, protecting the machine drive system and ensuring machining 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-edge design Z1 (positive): The single cutting edge allows for efficient chip removal, minimising friction and the risk of overheating the material.
• Polished chip flute: The mirrored surface of the spiral prevents sticking and secondary welding of the chips to the tool body.
• Finishing geometry of the edge: Precisely sharpened edge guarantees perfect edge quality without fraying.
• Low roughness of the shank (Ra ≤ 0.3 µm): The ground surface of the shank protects against slippage in the holder and safeguards the spindle taper from wear.
• Dynamic balancing in class G2.5: Balancing in accordance with ISO standards guarantees vibration-free operation at very high speeds.

Purpose and Area of Application:

The tool is intended for cutting operations as well as for welding and levelling edges in thin plastic sheets on CNC machining centres.

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