Helical Brazed PCD End Mill
Engineered for vibration-free, high-speed deep profiling. Unlike conventional straight-flute PCD tools, our custom Helical Brazed PCD End Mills feature precision-brazed diamond segments arranged in an optimized helical pattern. This advanced design transforms heavy impacts into a smooth shearing action. The result is significantly reduced cutting resistance, superior chip evacuation, and flawless 90-degree surface finishes, even when machining deep shoulders and delicate thin-walled components.
Ideal Machining Operations
Deep Shoulder Profiling Utilizing the extended cutting length (APMX) to machine precise 90-degree deep shoulders in a single pass, drastically reducing cycle times.
Thin-Walled Component Machining The low-cutting-force shearing action prevents deflection and distortion, making it the perfect choice for aerospace and 3C thin-walled aluminum parts.
High-Speed Slotting & Edging Delivers outstanding chip evacuation and mirror-like finishes on abrasive composites (CFRP/GFRP) and high-silicon aluminum alloys.



- Extended Tool Life
- Reduced Cycle Time
- Consistent Precision
- Mirror Surface Finish
Advantages of Sundi Helical Brazed Cutters
Smooth Shearing Action
The helical PCD edge engages the material gradually rather than pounding into it. This continuous shearing action reduces radial cutting forces, minimizing spindle load and protecting your machine bearings.
Chatter-Free Deep Milling
By dispersing the cutting pressure along the helix, this tool completely eliminates harmonic vibration (chatter), allowing you to utilize the full depth of cut (Max APMX) without sacrificing surface quality.
Optimized Chip Evacuation
The helical flute geometry acts like an auger, lifting and actively driving chips up and away from the cutting zone. This prevents chip recutting and jamming in deep slots or pockets.
Overlapping Precision Segments
Strategically brazed, overlapping PCD segments along the helical curve ensure a continuous, unbroken cutting line, producing a perfectly smooth, step-free mirror finish on the workpiece wall.