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Description
WNMG 080404 turning insert – indexable 80° trigon
| Technical data | |
|---|---|
| Side length l | 8.7 mm |
| Insert thickness s | 4.76 mm |
| Hole diameter d1 | 5.16 mm |
| Corner radius rε | 0.4 mm |
| ANSI code | WNMG 431 |
Cutting data for the WNMG insert for steel and stainless steel
finishing, semi-finishing and roughing — ISO P and M groups
| Material | Finishing | Semi-finishing | Roughing | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Vc [m/min] | Feed f [mm/rev] | ap [mm] | Vc [m/min] | Feed f [mm/rev] | ap [mm] | Vc [m/min] | Feed f [mm/rev] | ap [mm] | |
| PSteel | 200-295 | 0.1 | 0.5 | 170-240 | 0.22 | 2.5 | 150-215 | 0.3 | 4 |
| MStainless steel | 110-230 | 0.1 | 0.5 | 70-175 | 0.22 | 2.5 | 50-135 | 0.3 | 4 |
Grade H6310 cemented carbide indexable insert – applications and construction
double-sided 80° trigon with a hole and chip breaker
The WNMG 080404 turning insert is a double-sided indexable insert made of grade H6310 cemented carbide, designed for turning steel and stainless steel. Shape W, a trigon with a 80° corner angle, combines strength similar to that of a square insert with good access to the workpiece contour. The negative geometry with a 0° clearance angle allows both sides of the insert to be used — providing a total of six cutting edges. The corner radius rε of 0.4 mm promotes a smooth surface finish during finishing and semi-finishing. The hole with a double-sided chip breaker (type G according to ISO 1832) controls chip flow and breaking.
The PVD coating applied to the cemented carbide substrate increases the cutting edge's resistance to abrasion and oxidation, allowing grade H6310 to maintain stable performance in continuous and lightly interrupted turning. The trigon with a 80° corner is more resistant to chipping than a triangular insert, yet still allows longitudinal turning and facing without changing the holder. The rigid, double-sided design withstands vibration well when shafts are held between centers, while the smaller corner radius reduces radial forces on slender workpieces. This cutting insert is one of the most widely used turning tool insert options in series production.
Key advantages of the H6310 cemented carbide insert
- Six cutting edges — 3 corners on each of the two sides reduce the cost per cutting edge compared with single-sided inserts.
- Grade H6310 for ISO groups P and M — general-purpose PVD-coated carbide: steel (P20-P40) and stainless steel (M20-M40), and occasionally cast iron.
- Corner radius rε 0.4 mm — a small radius for finishing and light semi-finishing, with low radial forces on slender workpieces.
- The 80° corner provides a strong, load-resistant cutting edge — the trigon is more rigid than a triangular insert with a 60° corner.
- Tolerance class M, with an inscribed circle IC tolerance of ±0.08 mm, ensures repeatable cutting edge positioning after indexing the insert in its pocket.
- Dimensions according to ISO 1832: cutting edge length 8.7 mm, IC 12.7 mm (1/2″), thickness 4.76 mm — compatible with holders featuring a W pocket.
Applications and cutting data selection for the trigon insert
The WNMG 080404 insert (also written without a space as wnmg080404) is suitable for turning shafts, bushings, and flanges made of structural steels, as well as stainless steel components. Calculate spindle speed using the formula n = 1000·Vc/(π·D): for a shaft diameter of 50 mm at Vc = 200 m/min, the result is approximately 1273 rpm. The smaller corner radius of 0.4 mm makes this version suitable for finishing and light semi-finishing — for roughing at higher feed rates, select the WNMG 080408 or 080412 versions. For stainless steels, maintain a cutting speed of 110–230 m/min and a constant feed rate to reduce work hardening of the layer being cut. Indexable inserts in grade H6310 are supplied by the Korean brand Horn.
▲
Application limitation
Grade H6310 is not intended for steels hardened above 45 HRC — for hard turning, select the version WNMG 080404 CBN with a cubic boron nitride cutting edge.
Trigon insert designation decoder according to ISO 1832
how to read the WNMG 080404 code — positions 1–7 of the designation
Designation WNMG 080404 according to the standard ISO 1832: 4 letters describe geometry and construction, 3 numeric codes describe dimensions. Each field has a number, an icon, and a brief description.
Compatible turning tools
holders with a W trigon pocket (IC 12.7 mm) — external and internal turning
TWLNR/L 2020 K0820×20 × 125 mmR right-hand
←L left-hand
→
←L left-hand
→
TWLNR/L 2525 M0825×25 × 150 mmR right-hand
←L left-hand
→
←L left-hand
→
TWLNR/L 3232 P0832×32 × 170 mmR right-hand
←L left-hand
→
←L left-hand
→
TWLNR/L 4040 S0840×40 × 250 mmR right-hand
←L left-hand
→
←L left-hand
→
PWLNR/L 2020 K0820×20 × 125 mmR right-hand
←L left-hand
→
←L left-hand
→
PWLNR/L 2525 M0825×25 × 150 mmR right-hand
←L left-hand
→
←L left-hand
→
PWLNR/L 3232 P0832×32 × 170 mmR right-hand
←L left-hand
→
←L left-hand
→
PWLNR/L 4040 S0840×40 × 250 mmR right-hand
←L left-hand
→
←L left-hand
→
MWLNR/L 2020 K0820×20 × 125 mmR right-hand
←L left-hand
→
←L left-hand
→
MWLNR/L 2525 M0825×25 × 150 mmR right-hand
←L left-hand
→
←L left-hand
→
MWLNR/L 3232 P0832×32 × 170 mmR right-hand
←L left-hand
→
←L left-hand
→
MWLNR/L 4040 S0840×40 × 170 mmR right-hand
←L left-hand
→
←L left-hand
→
MWDNN 2020 K0820×20 × 125 mmR right-hand
←L left-hand
→
←L left-hand
→
MWDNN 2525 M0825×25 × 150 mmR right-hand
←L left-hand
→
←L left-hand
→
MWDNN 3232 P0832×32 × 170 mmR right-hand
←L left-hand
→
←L left-hand
→
MWDNN 4040 S0840×40 × 170 mmR right-hand
←L left-hand
→
←L left-hand
→
S25S TWLNR/L-08Ø25 | Ømin 32 mm | L=250R right-hand
←L left-hand
→
←L left-hand
→
S32T TWLNR/L-08Ø32 | Ømin 40 mm | L=300R right-hand
←L left-hand
→
←L left-hand
→
S40U TWLNR/L-08Ø40 | Ømin 50 mm | L=350R right-hand
←L left-hand
→
←L left-hand
→
S50V TWLNR/L-08Ø50 | Ømin 63 mm | L=400R right-hand
←L left-hand
→
←L left-hand
→
S25S PWLNR/L-08Ø25 | Ømin 32 mm | L=250R right-hand
←L left-hand
→
←L left-hand
→
S32T PWLNR/L-08Ø32 | Ømin 40 mm | L=300R right-hand
←L left-hand
→
←L left-hand
→
S40U PWLNR/L-08Ø40 | Ømin 50 mm | L=350R right-hand
←L left-hand
→
←L left-hand
→
S50V PWLNR/L-08Ø50 | Ømin 63 mm | L=400R right-hand
←L left-hand
→
←L left-hand
→
S25S MWLNR/L-08Ø25 | Ømin 32 mm | L=250R right-hand
←L left-hand
→
←L left-hand
→
S32T MWLNR/L-08Ø32 | Ømin 40 mm | L=300R right-hand
←L left-hand
→
←L left-hand
→
S40U MWLNR/L-08Ø40 | Ømin 50 mm | L=350R right-hand
←L left-hand
→
←L left-hand
→
S50V MWLNR/L-08Ø50 | Ømin 63 mm | L=400R right-hand
←L left-hand
→
←L left-hand
→
Frequently asked questions about the WNMG 080404 insert
use, turning tool selection, and turning parameters
Six — the trigon has 3 corners per side, and the negative geometry (0° clearance angle) allows both sides of the insert to be used. Once an edge becomes dull, simply rotate the insert in its pocket without changing the holder.
Holders with a W trigon pocket (IC 12.7 mm): for external turning TWLNR/L, PWLNR/L and MWLNR/L (entering angle 95°) and MWDNN (50°) with shank cross sections of 20×20–40×40 mm; for internal turning, boring bars S25S–S50V with the suffix TWLNR/L, PWLNR/L, or MWLNR/L.
Only in corner radius: 0.4 mm is used for finishing at low feed rates, 0.8 mm is the general-purpose version, and 1.2 mm is selected for roughing at feed rates up to 0.4–0.5 mm/rev. The other dimensions (IC 12.7 mm, thickness 4.76 mm) are identical.
Yes — grade H6310 covers group ISO M20-M40. Maintain a cutting speed of 110–230 m/min, a constant feed, and continuous emulsion cooling: austenitic steel conducts heat poorly and work-hardens when cutting is too slow.
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Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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