| SPMG U‑Drill – 2D | Diameters ~10 mm to ~60 mm (e.g., “2×D” series for SPMG U‑Drills) | Uses SPMG (or SP…) inserts; solid‐carbide U‑drill holder, internal coolant designs | Shallow hole drilling (depth ~2× diameter) in steels, cast iron, general materials where deep reach isn’t needed. | High rigidity, good hole accuracy, faster penetration compared to deep settings. For example: one spec shows feed rates for 2D depth in 45# steel of ~0.07‑0.12 mm/rev for D13‑18 mm. | Efficient shallow drilling, less tool deflection, simpler chip evacuation. |
| SPMG U‑Drill – 3D | Similar diameter range but length increased to ~3×D | Same SPMG insert family | Medium‐depth holes (~3×D) in moderate workpieces, general machining where deeper pockets or through features are required. | Balanced performance between shallow and deep; allows somewhat higher length while maintaining stability. | Good flexibility; one tool covers more depth without resorting to dedicated deep‑hole tools. |
| SPMG U‑Drill – 4D | Diameters ~12.5mm‑18mm | SPMG insert | Deeper holes (~4× diameter) — e.g., mold bases, thicker plates, deeper bosses. | Enables reach into deeper features while still keeping decent rigidity; outputs depend on machine & coolant. | Value in moderate deep hole drilling without specialized deep‑hole equipment. |
| SPMG U‑Drill – 5D | Diameters ~12.5mm‑18mm and longer total lengths (holder length increases) | SPMG insert | Deep hole drilling (~5× diameter) in bulk machining or workpieces with depth requirements. | Achieves deeper holes with indexable system; may require slower cut parameters to maintain accuracy. | Cost efficient alternative to full deep‐hole drills; fewer tool changes; good for production. |
| WCMT/WCMX U‑Drill – 2D | Diameters ~14‑60mm (example spec: 14‑19.5mm) | WCMT or WCMX inserts; internal coolant | Shallow hole drilling with indexable inserts, for larger diameters, non‑ferrous or mixed materials. | Good accuracy, large diameter capability, ease of insert replacement. | Cost effective for larger holes, quick indexable inserts reduce downtime. |
| WCMT/WCMX U‑Drill – 3D | Medium depths (~3× diameter) for larger diameters | WCMX inserts | Medium depth applications, good for stainless, alloy materials where chip control is key. | Maintains accuracy in moderate depth; improved chip geometry and evacuation. | Versatility, especially for harder materials or when chip removal is challenging. |
| WCMT/WCMX U‑Drill – 4D | Example: diameters ~14‑18mm with 4×D length | WCMX inserts | Deeper hole drilling in non‐ferrous or mixed material environments; larger diameters. | Good deep reach, accuracy retained; suited for production work. | Provides deep hole capability with indexable economy; less scrap, better tool life. |
| WCMT/WCMX U‑Drill – 5D | Larger diameter, 5×D depth; used where reach is significant | WCMX inserts | Deep hole, large diameter drilling operations; e.g., structural, heavy duty, multiple layers. | Enables deep drilling with economy of insert reuse; may require slower feed/rigid setup. | High productivity for deep holes; less cost per hole vs non‐indexable alternatives; good for production environments. |
