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

Index: SF51.12.052.100.12R

Industrial spiral end mill made from solid carbide (VHM) from the SF51  series with a negative design (chip removal downward). Designed for efficient rough machining, grooving, and slotting on CNC machining centres and overhead spindle milling machines. The left-hand spiral (negative) thread presses the material against the worktable, eliminating the risk of tearing on the upper edge of the workpiece. Three spiral blades 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 stability of the process.

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 provides a perfectly finished, clean top edge.
• Premium solid carbide (VHM): Rigid monolithic construction minimises tool deflection under load and guarantees high mechanical durability.
• Geometry with chip breaker: Divides the machined material into smaller pieces, reducing cutting resistance and stabilising the operation of the system.
• Optimised shank roughness: The shank surface features low roughness (Ra ≤ 0.3 µm), preventing slipping in the holder and protecting the spindle taper from wear.
• Dynamic balancing class G2.5: Static-dynamic balancing in accordance with ISO/EN standards (class G2.5) eliminates vibrations at maximum rotational speeds.