Turning Inserts
WNMG Carbide Turning Inserts
Negative 80° trigon turning inserts in ISO 1832 standard sizes — the balanced choice between edge strength and clearance for general turning of steel, cast iron and stainless steel.
Product Overview
WNMG inserts are negative 80° trigon-shaped indexable turning inserts with a 0° clearance angle, available in standard ISO sizes WNMG080404 / 080408 (IC 12.7 mm, thickness 4.76 mm, nose radius 0.4 / 0.8 mm). The 80° trigon geometry gives a stronger cutting edge than 60° triangular inserts while keeping better clearance than square shapes, with 6 cutting edges per insert (3 corners × 2 sides). They are the reliable general-purpose choice for external and internal turning, facing and profiling of carbon steel, alloy steel, cast iron and stainless steel in roughing, semi-finishing and finishing operations.
Key Features
- 6 cutting edges per insert (3 corners × 2 sides, negative design) — low cost per edge
- 80° trigon corner angle balances edge strength and clearance for general turning
- CVD multilayer coating for wear resistance and thermal stability
- Stable substrate with consistent hardness across batches
- Edge passivation reduces chipping and extends tool life
- Full size range: WNMG0604, 0804, 0904 series; custom grades and private-label packaging available
Applications
Factory-direct — produced in our own carbide plant
ISO 1832 dimensional compliance, batch inspected
OEM / ODM support for distributors and brands
Application support for grade and parameter selection
Technical Specifications
| Item | Specification |
|---|---|
| Insert Shape | 80° Trigon (W type), negative geometry |
| Standard Sizes | WNMG080404 / WNMG080408 (ISO 1832) |
| Inscribed Circle (IC) | 12.7 mm (per ISO 1832) |
| Thickness (S) | 4.76 mm |
| Nose Radius (r) | 0.4 / 0.8 mm |
| Coating | CVD (MT-TiCN + Al2O3 + TiN) / PVD / Uncoated |
| Applications | External & internal turning, facing, profiling |
| Workpiece Materials | Carbon steel, alloy steel, stainless steel, cast iron |
| MOQ | 10 pcs (standard sizes) |
| Lead Time | 3-7 days standard, 15-30 days custom |
* Specifications subject to change. Contact us for the current datasheet.
FAQ
Questions Buyers Ask
What does WNMG stand for?
Per ISO 1832: W = 80° trigon shape, N = negative clearance angle (0°), M = tolerance class (medium, ±0.08 to ±0.13 mm), G = chip breaker/face type. WNMG080408: IC 12.7 mm, thickness 4.76 mm, nose radius 0.8 mm.
What is the advantage of the 80° trigon shape?
The 80° corner angle gives a noticeably stronger cutting edge than 60° triangular inserts, reducing corner breakage on interrupted cuts and heavier feeds, while the trigon profile still clears the workpiece better than square or 80° diamond shapes in many holders. It is the classic geometry for general-purpose turning where neither maximum strength nor maximum clearance is critical.
What is the difference between WNMG and CNMG inserts?
Both are negative inserts in the same 12.7 mm IC class. CNMG is an 80° diamond shape with 8 cutting edges — lowest cost per edge for continuous turning. WNMG is an 80° trigon with 6 cutting edges but a stronger corner and better approach in certain holders, preferred for heavier feeds, interrupted cuts and some internal operations. Choose CNMG for pure cost per edge, WNMG when edge strength matters more.
Which WNMG grade should I use for stainless steel?
For stainless steel (M group), use PVD-coated grades with sharper, tougher edges — they reduce work hardening and built-up edge. For carbon steel and cast iron (P/K groups), CVD-coated grades give better wear resistance at higher cutting speeds. Send us your workpiece material, operation and machine, and we will recommend the right grade.
Do you offer private label for WNMG inserts?
Yes — OEM/ODM with private-label packaging, custom grades and laser marking per your specification. Standard sizes MOQ 10 pcs, with application support for grade and parameter selection.
APPLICATIONS
Where It's Used
Typical machining operations and workpiece materials for WNMG Carbide Turning Inserts. Contact us with your operating parameters for grade selection support.
External turning of steel shafts
Internal bore turning
Face turning of flanges and discs
Cast iron machining
Stainless steel turning
General roughing and semi-finishing
Interested in WNMG Carbide Turning Inserts?
Factory-direct pricing, OEM/ODM options and lead times — send your spec and volume, get a quote within 24 hours.