Everything you need to know about WNMG 0804, 432 inserts, chipbreakers, geometry, applications, and how to choose the best WNMG insert for steel, stainless steel, nickel alloys, and light finishing.
1. What is a WNMG Insert?
WNMG inserts are double-sided, negative rake, 80° rhombic turning inserts widely used for medium cutting, roughing, and finishing applications.
The name WNMG follows ISO insert nomenclature where:
W = 80° diamond shape
N = 0° clearance (negative insert)
M = tolerance class M
G = single-sided chip groove with hole
These inserts are known for:
✔ high stability
✔ strong cutting edge
✔ excellent chip evacuation
✔ ability to run at high feed rates (FPM)
✔ cost-effectiveness due to double-sided geometry
2. Common WNMG Insert Sizes (Complete Overview)
Below are the most popular commercial sizes searched by customers:
WNMG 0804 insert
WNMG 432 insert
WNMG 431 insert
WNMG 332 / 331 inserts
WNMG 06 insert
WNMG 08 insert
WNMG 332-TF, WNMG 432-TF IC9250
WNMG 332-MP, WNMG 432-MP
| WNMG Insert Code | ISO Size | Cutting Edge Length (mm) | Thickness (mm) | Nose Radius |
|---|---|---|---|---|
| WNMG 431 | 12mm | 12.7 | 4.76 | 0.8mm |
| WNMG 432 | 12mm | 12.7 | 4.76 | 0.8mm |
| WNMG 0804 | 08 | 9.525 | 3.97 | 0.4mm |
| WNMG 332 | 09 | 9.525 | 3.97 | 0.8mm |
3. WNMG Insert Geometry Explained (Angle, Rake, Tolerance)
A typical WNMG geometry includes:
✔ 0° clearance (negative insert) → high strength
✔ Double-sided → lower cost per cutting edge
✔ Strong chipbreakers for steel, stainless steel, nickel alloys
✔ Wide feed range → suitable for medium/rough machining
✔ Polished WNMG inserts → better for aluminum
Popular chipbreaker options include:
MP for medium cutting
TF for stainless steel finishing
DF / EF for light cuts
FPM design for high feed
4. WNMG Inserts for Different Materials
Steel (P Material)
Best: WNMG 432-MP, WNMG 332-MP
Deep cuts, medium finishing
High stability, predictable chip curls
Stainless Steel (M Material)
Best: WNMG 432-TF, WNMG 331-TF
Anti-built-up edge design
Lower friction coating (CVD / PVD)
Nickel & High-Temp Alloys
Best: WNMG 432 IC9250, wnmg 332 DF ybc152
Edge honed for heat resistance
Cast Iron (K Material)
Best: WNMG 432-KR
Abrasion resistant
Aluminum
Polished inserts (WNMG-V, WNMG for aluminum)
Ultra-sharp cutting edge
5. WNMG Insert Holders & Boring Bars
Common turning holder models:
MWLNR/L (external turning)
S32T boring bar WNMG (internal turning, long reach)
Right-hand / left-hand tool holders
| Operation | Recommended Holder | Insert Type |
|---|---|---|
| External turning | MWLNR 2020K-12 | WNMG 432 |
| Heavy roughing | MWLNL 2525M-12 | WNMG 332 |
| Boring / Internal turning | S32T WLNR | WNMG 431 / 432 |
6. WNMG Inserts vs. Other Turning Inserts (CNMG, TNMG, DNMG)
| Insert | Angle | Strength | Finishing | Application |
|---|---|---|---|---|
| WNMG | 80° | ★★★★★ | ★★★★ | steel, stainless |
| CNMG | 80° | ★★★★★ | ★★★ | roughing |
| TNMG | 60° | ★★★ | ★★★★ | light cuts |
| DNMG | 55° | ★★★ | ★★★★★ | finishing |
7. How to Choose WNMG Inserts (Full Checklist)
✔ Material type (P/M/N/K/S)
✔ Depth of cut (DOC)
✔ Feed rate (FPM / mm/rev)
✔ Machine stability
✔ Chipbreaker style
✔ Coating (CVD for steel, PVD for stainless)
8. Why HNCarbide WNMG Inserts Are Preferred by CNC Shops At HNCarbide / Huana, we manufacture:
At HNCarbide / Huana, we manufacture:
WNMG 08, WNMG 06, WNMG 332, WNMG 431, WNMG 432
IC9250 alternatives
Mitsubishi equivalent WNMG inserts
High-polished WNMG-V inserts for aluminum
OEM/ODM solutions
100% ground inserts, double-wall export packaging
9. Conclusion & CTA
Choosing the right WNMG insert can dramatically change tool life, surface finish, and chip control.
Whether you need WNMG 432, WNMG 332, or polished WNMG aluminum inserts, HNCarbide provides stable and long-life turning solutions.
