Buy Turning Inserts Online in Australia
Turning Insert Selection — Quick Reference
Turning inserts = INDEXABLE CARBIDE cutting tips for LATHE + CNC turning operations — replacing HSS lathe tools for production turning + finishing + high-volume machining. Indexable = fast tip change + multiple cutting corners per insert.
| Insert Geometry | Best For |
|---|---|
| CNMG (80° Diamond) | Roughing + general turning — workshop standard |
| DNMG (55° Diamond) | Profiling + finishing + plunge |
| VNMG (35° Diamond) | Profiling + complex contours |
| TNMG (60° Triangle) | Versatile + economical — 6 cutting corners |
| WNMG (80° Trigon) | Strong cutting edge + roughing |
| SNMG (Square) | Cost-effective — 8 cutting corners |
| Negative Rake (Heavy Cut) | Stable cutting + roughing |
| Positive Rake (Finishing) | Lighter cut + good finish |
| Coated Carbide (TiN / TiAlN / Al2O3) | Production + extended life |
| Uncoated Carbide | Aluminium + finishing |
| Ceramic / CBN / Diamond | Hardened + cast iron + non-ferrous specialty |
Critical: Match insert GEOMETRY + GRADE to material + operation — wrong = bad finish + tool breakage. Coating selection matters — AlTiN for steel + stainless; PVD for general; CVD for cast iron. Tool holder must match insert seat angle exactly. Brands: Seco, Maxigear. Companion: indexable inserts, indexable turning, machinery.
Turning Inserts for Australian Lathe and CNC Turning
Turning inserts are the indexable carbide cutting tips used in lathe and CNC turning operations — replacing traditional HSS lathe tools for production turning, finishing, and high-volume machining. The indexable design allows fast tip rotation when one edge wears, with multiple cutting edges on each insert. For Australian production turning workshops, toolrooms, and CNC machining operations, the right turning insert matched to the operation, material, and tool holder is essential. AIMS Industrial supplies turning inserts from SECO and approved cutting tool brands.
The turning insert geometries we stock
- CNMG — 80° rhombic insert; the everyday workhorse for general turning
- DNMG — 55° rhombic insert; for profile work and finishing
- WNMG — 80° trigon insert; balanced cutting and finishing capability
- TNMG — 60° triangular insert; six cutting edges per insert
- SNMG / SCMT — square insert with 90° corners; eight cutting edges per insert
- VBMT / VNMG — 35° rhombic insert; for fine profile work
- RCMT — round insert; for profiling and finishing curved surfaces
- Threading inserts — see our thread turning inserts range
Choosing the right insert geometry
- General-purpose turning — CNMG (80° rhombic) is the most-used insert; balances strength and capability
- Profile and finish work — DNMG (55°) or VBMT (35°) for cleaner cuts on profiled work
- Heavy roughing — square or trigon inserts (SNMG, WNMG) for maximum cutting edges per insert
- Curved profiles — round inserts (RCMT) for ball-end and curve turning
- Threading — dedicated thread turning inserts
Insert grades — match to material
Insert grade selection is driven by workpiece material:
- P-grade — for steel, the most common grade in general workshop use
- M-grade — for stainless steel; toughness for work-hardening
- K-grade — for cast iron; short-chip cutting
- N-grade — for aluminium and non-ferrous; sharp edges
- S-grade — for high-temperature alloys (Inconel, titanium)
- H-grade — for hardened steels in finish turning
Coatings (TiN, TiCN, TiAlN, AlTiN) extend life on the more demanding grades.
Where turning inserts earn their place
- Production turning on CNC lathes — high-volume production where insert change time matters
- General lathe and turning centre work — versatile inserts for varied turning operations
- Toolroom and prototype work — quick insert changes between operations
- Heavy roughing — high stock removal in initial turning operations
- Finishing — surface quality matters more than speed
Insert designation explained
ISO insert designation (e.g. CNMG120408) encodes shape and dimensions:
- 1st letter (C) — insert shape (C = 80° rhombic)
- 2nd letter (N) — clearance angle (N = 0° / negative)
- 3rd letter (M) — tolerance class
- 4th letter (G) — fixing/clamping type
- Numerical (12-04-08) — size, thickness, and corner radius
Match the insert designation to the tool holder; substituting different geometries requires holder change.
Brands stocked at AIMS
SECO is the approved premium brand for turning inserts — engineered for production performance and consistent quality. Other approved cutting tool brands fill specific roles in the broader range. For specialty inserts, large-quantity orders, or specific OEM requirements, sourcing through our distribution channels covers most options.
Companion ranges at AIMS
Turning inserts sit alongside our broader cutting tool range — see thread turning inserts, parting and grooving, milling inserts, and tool holder accessories for the related products.
Need help speccing turning inserts for production or toolroom turning? contact our team — we'll match insert geometry, grade, and tool holder.