The SDNCN is a model designation for a specific type of screw-on style turning tool holder, primarily designed for external (OD) turning and profiling operations on CNC lathes. These toolholders belong to the ISO turning insert toolholder system and are characterized by their 62.5-degree approach (or lead) angle, which defines the cutting edge orientation.
The screw-on (or "S-type") clamping mechanism is a key feature, where a single screw directly clamps the cutting insert onto the seat. This design provides secure, rigid clamping and is typically used with diamond-shaped (55°) indexable inserts.
