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Carbide insert WNMG 080404 - Carbide insert lathe MA H6310 Horn
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  • Carbide insert WNMG 080404 - Carbide insert lathe MA H6310 Horn
  • Carbide insert WNMG 080404 - Carbide insert lathe MA H6310 Horn - nr. 1
Horn

Carbide insert WNMG 080408 MA H5115 Horn

Horn Horn
15227
Cutting edge length: 082 sizes of this insert
0608
€6.64 tax inc.

Net price: €5.39

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Call and order: (44) 755-04-05

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
WNMG 080408 indexable turning insert in H5115 cemented carbide, double-sided 80° trigon with a hole and chip breaker for cast iron

Cutting data for the WNMG 080408 insert for cast iron and hardened materials

finishing, semi-finishing, and roughing — ISO groups K and H

MaterialFinishingSemi-finishingRoughing
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]
KCast iron 170-280 0.15 0.8 125-225 0.25 2.5 135-210 0.4 4
HHardened materials 80-150 0.08 0.2 60-120 0.12 0.5 40-100 0.15 1

Grade H5115 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 grade H5115 cemented carbide, designed for turning cast iron. The W shape, a trigon with a 80° corner angle, combines three strong corners with high cutting edge rigidity. The negative geometry with a 0° clearance angle allows both sides of the insert to be used — a total of six edges. The CVD coating carries heat away from the cutting zone and allows high speeds to be maintained when turning iron castings.

Key advantages of the H5115 cemented carbide insert

  • Six cutting edges — 3 corners with an angle of 80° on each of the two sides reduce the cost per cutting edge compared with single-sided inserts.
  • Grade H5115 for cast iron (ISO group K) — CVD-coated carbide for precision turning and boring of gray, ductile, and malleable iron castings.
  • Corner radius rε 0.8 mm — a general-purpose compromise between surface finish and corner strength at feed rates of 0.15–0.4 mm/rev.
  • The large 80° corner angle provides a rigid, strong edge that withstands loads during roughing and machining through casting skin.
  • Dimensions according to ISO 1832: side length 8.7 mm, IC 12.7 mm (1/2″), thickness 4.76 mm — suitable for holders with a W08 insert pocket.
  • The hole with a chip breaker on both sides (type G according to ISO 1832) secures the insert and controls the breaking of short cast iron chips.

Applications and cutting data selection for the trigon insert

The WNMG 080408 insert (also written without a space as wnmg080408) is suitable for precision external turning and boring of gray, ductile, and malleable iron castings. Calculate spindle speed using n = 1000·Vc/(π·D): for a shaft with a diameter of 80 mm at Vc = 225 m/min, the result is approximately 895 rpm. The large 80° corner angle provides a rigid edge that withstands loads during roughing of castings and interrupted cuts through casting skin.

When roughing cast iron, maintain a cutting speed of 135–210 m/min, a feed rate of up to 0.4 mm/rev, and a depth of cut of up to 4 mm, ensuring uniform loading of each corner. For finishing, reduce the feed rate to 0.15 mm/rev to achieve a smoother surface and lower edge wear with a nose radius of 0.8 mm. Tolerance class M ensures repeatable edge positioning each time the insert is indexed in the holder pocket, reducing the time needed for dimensional corrections between successive cutting edges.

Grade H5115 indexable inserts are supplied by the Korean brand Horn, known for economical tools for production turning. Before selecting a holder and shim, check the entering angle of the turning tool and the available shank cross sections to match the W08 pocket to the workpiece size. With stable clamping and continuous coolant supply, grade H5115 allows speeds reaching approximately 400 m/min in gray cast iron.

▲
Application limitation

The CVD on grade H5115 is thicker and less resistant to thermal shock than PVD coatings. For heavily interrupted cutting or without a stable coolant supply, consider a grade with a thinner coating PVD, and for hard turning of hardened steels — a cubic boron nitride version (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.

ISO 1832 designation decoder — how to read the code

1Wshape 2Nangle α 3Mtolerance 4Gtype – 508size 604thickness 708radius rε

Positions 1–4 · ISO code

1WShape

80° trigon

3 corners of 80° per side

2NClearance angle

α = 0°

negative, double-sided

3MTolerance

Class M (intermediate)

IC ±0.08 · thickness ±0.13 mm

4GType

Hole + chip breaker

chip breaker on both sides

Positions 5–7 · dimensions [mm]

508Size

l = 8.7 mm

IC = 12.7 mm · 1/2″

604Thickness

s = 4.76 mm

between rake faces

708Corner radius

rε = 0.8 mm

code ÷ 10 → radius in mm

✓ 3 corners × 2 sides = 6 cutting edges

Full designation: WNMG 080408 = 80° trigon · negative · class M · hole and chip breaker · IC 12.7 mm (l 8.7 mm) · s 4.76 mm · rε 0.8 mm

Compatible turning tools

holders with a W08 trigon insert pocket — external and internal turning

TWLNR/L 2020 K0820×20 × 125 mmR right-hand
←L left-hand
→
TWLNR/L 2525 M0825×25 × 150 mmR right-hand
←L left-hand
→
TWLNR/L 3232 P0832×32 × 170 mmR right-hand
←L left-hand
→
TWLNR/L 4040 S0840×40 × 250 mmR right-hand
←L left-hand
→
PWLNR/L 2020 K0820×20 × 125 mmR right-hand
←L left-hand
→
PWLNR/L 2525 M0825×25 × 150 mmR right-hand
←L left-hand
→
PWLNR/L 3232 P0832×32 × 170 mmR right-hand
←L left-hand
→
PWLNR/L 4040 S0840×40 × 250 mmR right-hand
←L left-hand
→
MWLNR/L 2020 K0820×20 × 125 mmR right-hand
←L left-hand
→
MWLNR/L 2525 M0825×25 × 150 mmR right-hand
←L left-hand
→
MWLNR/L 3232 P0832×32 × 170 mmR right-hand
←L left-hand
→
MWLNR/L 4040 S0840×40 × 170 mmR right-hand
←L left-hand
→
MWDNN 2020 K0820×20 × 125 mmR right-hand
←L left-hand
→
MWDNN 2525 M0825×25 × 150 mmR right-hand
←L left-hand
→
MWDNN 3232 P0832×32 × 170 mmR right-hand
←L left-hand
→
MWDNN 4040 S0840×40 × 170 mmR right-hand
←L left-hand
→
S25S TWLNR/L-08Ø25 | Ømin 32 mm | L=250R right-hand
←L left-hand
→
S32T TWLNR/L-08Ø32 | Ømin 40 mm | L=300R right-hand
←L left-hand
→
S40U TWLNR/L-08Ø40 | Ømin 50 mm | L=350R right-hand
←L left-hand
→
S50V TWLNR/L-08Ø50 | Ømin 63 mm | L=400R right-hand
←L left-hand
→
S25S PWLNR/L-08Ø25 | Ømin 32 mm | L=250R right-hand
←L left-hand
→
S32T PWLNR/L-08Ø32 | Ømin 40 mm | L=300R right-hand
←L left-hand
→
S40U PWLNR/L-08Ø40 | Ømin 50 mm | L=350R right-hand
←L left-hand
→
S50V PWLNR/L-08Ø50 | Ømin 63 mm | L=400R right-hand
←L left-hand
→
S25S MWLNR/L-08Ø25 | Ømin 32 mm | L=250R right-hand
←L left-hand
→
S32T MWLNR/L-08Ø32 | Ømin 40 mm | L=300R right-hand
←L left-hand
→
S40U MWLNR/L-08Ø40 | Ømin 50 mm | L=350R right-hand
←L left-hand
→
S50V MWLNR/L-08Ø50 | Ømin 63 mm | L=400R right-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 of 80° on each side, and the negative geometry (0° clearance angle) allows both sides of the insert to be used. Once an edge becomes dull, simply index the insert in its pocket without changing the holder.

Holders with a W08 trigon insert 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 higher feed rates. The remaining dimensions (IC 12.7 mm, thickness 4.76 mm) are identical.

Yes — grade H5115 covers group ISO K and is suitable for gray, ductile, and malleable cast iron. The CVD coating allows speeds of up to approximately 400 m/min; ensure rigid workpiece clamping and uniform corner loading.

Product accessories

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Reference: 0000010523 In stock > 10 items

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Carbide insert WNMG 080408 MA H5115 Horn

Carbide insert WNMG 080408 MA H5115 Horn

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