Three-flute roughing end mill VHM from the SF51 series 

Index: SF51.18.055.110.18R

Industrial spiral end mill made of sintered carbide (VHM) from the SF51  series with a negative design (chip removal downwards). Designed for efficient rough machining, cutting, and grooving on CNC machining centres and overhead spindle mills. The left-hand spiral (negative) geometry presses the material against the work table, eliminating the risk of tearing at the top 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 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 evacuation presses the workpiece against the table and provides a perfectly finished, clean top edge.
• Premium class monolithic carbide (VHM): Rigid monolithic design minimises 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 the system's operation.
• 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 cone 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.