DCGT Series Inserts: Full Model Range & Cross References
The DCGT prefix is the first four positions of the ISO 1832 designation — it defines the insert family, identical for every size in the series: 55° rhombic · 7° clearance · precision tolerance · Fixing hole, integral chipbreaker on one face (single-sided insert). The numeric positions that follow select inscribed circle, thickness and nose radius; only the full core code is a complete geometry specification.
Shape
55° rhombic
Rhombic (diamond) insert, 55° included angle
Clearance
7°
7° clearance
Tolerance
class
Precision tolerance class (ground periphery and thickness)
Fixing / chipbreaker
Fixing hole, integral chipbreaker on one face (single-sided insert)
DCGT model range
| Designation | IC d1 | Thickness s | Nose rε | Direction | Brand data | |
|---|---|---|---|---|---|---|
| DCGT070202 | 6.35 mm | 2.38 mm | 0.2 mm | neutral | cited | Specs → |
| DCGT070204 | 6.35 mm | 2.38 mm | 0.4 mm | neutral | cited | Specs → |
| DCGT11T302 | 9.525 mm | 3.97 mm | 0.2 mm | neutral | cited | Specs → |
| DCGT11T304 | 9.525 mm | 3.97 mm | 0.4 mm | neutral | cited | Specs → |
| DCGT11T308 | 9.525 mm | 3.97 mm | 0.8 mm | neutral | cited | Specs → |
Typical applications by size
- ▸Small IC (≤ 6.35 mm) — finishing, small parts, internal boring and precision cuts.
- ▸Medium IC (9.5–12.7 mm) — general turning, the default range for CNC lathes with the widest holder and chipbreaker choice.
- ▸Large IC (≥ 15.9 mm) — roughing, heavy interrupted cuts and high-feed facing on rigid machines.
Shape-level operations: profile turning, copy turning, undercutting.
How to select within the DCGT series
- ▸Match IC and thickness to the toolholder pocket — the holder catalogue specifies the seat size.
- ▸Nose radius by finish and rigidity: small radii for fine finishing and vibration-prone setups, larger radii for feed and edge strength.
- ▸Choose the chipbreaker suffix for the intended feed band, then the grade for the ISO 513 workpiece group.
- ▸Cross-brand substitution is geometry-safe on the core code; keep chipbreaker and grade matched or verified.
Cross-brand availability
The ISO 1832 DCGT geometry is brand-neutral and is catalogued by the major manufacturers listed on the brands page. Verified full ordering codes and grade mappings are attached to each individual model page as catalogues are processed.
Need verified specs or sourcing for an insert?
Send the ISO code (or a brand ordering number) and your workpiece material. We reply within one business day with the verified specification and original + equivalent grade options — no obligation.