Improper Angle Selection of CNC Vibrating Knife Blades Triggers Fracture—Scientific Sizing Is the Key

CNC vibrating knives are widely applied in industrial production for their high precision and efficiency, yet issues such as blade fracture and chipping frequently disrupt manufacturing processes. Industry analysis indicates that improper blade angle selection is one of the primary causes of such failures. Scientifically matching blade angles has thus become a core step to enhance cutting efficiency and reduce production costs.

Blade angles directly impact cutting performance and service life. A too small angle delivers an ultra-sharp cutting edge but poor impact resistance, leading to easy chipping when cutting hard materials. Conversely, an overly large angle ensures high blade strength but increases cutting resistance and reduces production efficiency. Relying solely on experience while neglecting the precise matching of blade angles to material properties is a common cause of premature tool damage and compromised production stability.

Based on material characteristics, mainstream blade angles are categorized into three types to achieve optimal cutting results:

16° Blade: Boasting an extremely sharp cutting edge, it is exclusively engineered for soft and thin materials such as foam, sponge and EVA, enabling a smooth and clean cut. Note that it should be avoided for medium and high-density materials, as this will result in severe chipping.

26° Blade: Striking a perfect balance between sharpness and structural strength, it is recognized as the universal choice for medium-hardness and medium-thickness materials including pearl cotton, corrugated cardboard and medium-density fiberboard (MDF). It is a low-risk, safe option when material properties are unknown.

45° Blade: Featuring a large-angle design to reinforce edge rigidity, it is specially developed for cutting thick and hard materials like car floor mats, high-density rubber and thick PVC sheets. It can significantly extend tool service life and increase the single cutting depth.

Blade angle selection is a science rooted in material characteristics. Precise angle matching not only effectively reduces blade fracture and chipping, but also transforms CNC vibrating knives into a stable efficiency-enhancing tool, providing a solid guarantee for enterprises to cut costs and boost operational efficiency.