Three-flute roughing spiral end mill VHM from the SF51 series 

Index: SF51.20.060.120.20R

Industrial spiral end mill made from solid carbide (VHM) from the SF51  series with a negative design (chip ejection downwards). Designed for efficient rough machining, cutting, and grooving on CNC machining centres and gantry milling machines. The left-handed screw line (negative) presses the material against the work table, eliminating the risk of tear-outs on the upper edge of the workpiece. Three spiral cutting edges with a profiled chip breaker reduce cutting resistance, lower spindle load, and effectively dampen vibrations during intensive cutting. The ground shank with an accuracy class of H6 protects the drive system and ensures high process stability.

Key technical parameters and properties:

• Three-flute roughing design Z3 (negative): Dedicated roughing profile with downward chip removal presses the workpiece against the table and ensures a perfectly finished, clean upper edge.
• Premium class solid carbide (VHM): Rigid monolithic construction minimizes tool deflection under load and guarantees high mechanical durability.
• Geometry with chip breaker: Divides the machined material into smaller fragments, reducing cutting resistance and stabilising system performance.
• Optimised shank roughness: The shank surface is characterised by low roughness (Ra ≤ 0.3 µm), which prevents slipping in the holder and protects the spindle taper from wear.
• Dynamic balancing in class G2.5: Static-dynamic balancing in accordance with ISO/EN standard (class G2.5) eliminates vibrations at maximum rotational speeds.