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Description
WNMG 080408 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 | 0.8 mm |
| ANSI code | WNMG 432 |
Cutting data for the WNMG 080408 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 | 0.15 | 0.5 | 170-240 | 0.3 | 2.5 | 150-215 | 0.5 | 4 |
| MStainless steel | 110-230 | 0.15 | 0.5 | 70-175 | 0.3 | 2.5 | 50-135 | 0.5 | 4 |
Grade H6310 cemented carbide indexable insert – applications and construction
double-sided 80° trigon with a hole and chip breaker
The WNMG 080408 turning insert is a double-sided indexable insert made of H6310 grade cemented carbide, designed for turning steel and stainless steel. Shape W, a trigon with a 80° corner angle, combines rigidity close to that of a square insert with better access to the workpiece contour than a sharp triangle provides. Negative geometry with a 0° clearance angle allows both sides of the insert to be used — a total of six cutting edges. The rε 0.8 mm nose radius balances surface finish with corner strength at feed rates of 0.15–0.5 mm/rev.
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 — PVD-coated carbide: steel (P20-P40) and stainless steel (M20-M40), occasionally also cast iron.
- Corner radius rε 0.8 mm — a general-purpose option spanning finishing and roughing, without changing the insert between operations.
- Shape W (80° trigon) provides a more rigid and stronger edge than a 60° triangle, with better contour access than a square insert.
- Dimensions according to ISO 1832: edge length 8.7 mm, IC 12.7 mm (1/2″), thickness 4.76 mm — fit holders with a 08 pocket.
- Tolerance class M, with an inscribed circle IC tolerance of ±0.08 mm, ensures repeatable corner positioning after rotating the insert in its pocket.
Design and applications of the trigon insert
The mounting hole and double-sided chip breaker (type G per ISO 1832) control chip flow and breaking during longitudinal turning and facing. PVD-coated H6310 carbide covers ISO groups P20-P40 and M20-M40, allowing one insert to handle structural steel, alloy steel, and stainless steel, as well as cast iron occasionally. Tolerance class M ensures repeatable edge positioning after rotating the insert in its pocket, reducing tool setup time. Size 08 corresponds to an inscribed circle IC of 12.7 mm (1/2″) and fits standard holders with a size 08 pocket. The commercial suffix MA is a catalog designation and does not affect the insert geometry or application range.
Parameter selection and spindle speed calculation
The WNMG 080408 insert (also written without spaces as wnmg080408) is suitable for turning shafts, bushings, and flanges made of structural steels, as well as stainless steel components, covering typical external and internal turning insert applications. Calculate spindle speed using n = 1000·Vc/(π·D): for a shaft diameter of 50 mm at Vc = 200 m/min, the result is approximately 1273 rpm. For stainless steels, maintain a cutting speed of 50–230 m/min and a constant feed to limit work hardening of the layer being cut. H6310 grade indexable inserts are supplied by the Korean brand Horn.
▲
Application limitation
Grade H6310 is not intended for steels hardened above 45 HRC — for turning inserts for hardened steel and hard turning, choose a version with a cubic boron nitride edge (CBN).
Trigon insert designation decoder according to ISO 1832
how to read the WNMG 080408 code — positions 1–7 of the designation
Designation WNMG 080408 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 size 08 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 080408 insert
use, turning tool selection, and turning parameters
Six — the trigon has 3 corners per side, and the negative geometry (clearance angle 0°) allows both sides of the insert to be used. When a corner becomes dull, simply index the insert in the pocket without changing the holder.
Holders with a size 08 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 20×20–50×50 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 higher feed rates. The remaining dimensions (IC 12.7 mm, thickness 4.76 mm) are identical.
Yes — grade H6310 covers group ISO M20-M40. Maintain a cutting speed of 50–230 m/min, a constant feed, and continuous cooling: austenitic steel dissipates heat poorly and work-hardens when cutting is too slow.
Product accessories
Carbide insert WNMG 080404 MA H6310 Horn
Reference: 0000004240 In stock > 10 items
€5.26
€6.47 brutto
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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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