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

Index: SF51.08.032.080.08R

Industrial spiral end mill made from solid cemented 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 overhead milling machines. The left-hand helical flute (negative) presses the material down to the work table, eliminating the risk of chips tearing off the upper edge of the workpiece. Three spiral flutes with a profiled chip breaker reduce cutting resistance, decrease spindle load, and effectively dampen vibrations during intensive cutting. The ground shank in accuracy class 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 ejection presses the workpiece to the table and ensures a perfectly finished, clean upper edge.
• Premium class solid carbide (VHM): The rigid monolithic construction minimizes tool deflection under load and guarantees high mechanical durability.
• Geometry with chip breaker: Divides the cut material into smaller fragments, reducing cutting resistance and stabilizing system operation.
• Optimised shank roughness: The shank surface features low roughness (Ra ≤ 0.3 µm), preventing slippage in the holder and protecting the spindle taper from wear.
• Dynamic balancing in class G2.5: Static-dynamic balancing in accordance with ISO/EN standards (class G2.5) eliminates vibrations at maximum rotational speeds.