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Description
WNMG 060408 turning insert – indexable 80° trigon
| Technical data | |
|---|---|
| Side length l | 6.5 mm |
| Insert thickness s | 4.76 mm |
| Hole diameter d1 | 3.81 mm |
| Corner radius rε | 0.8 mm |
| ANSI code | WNMG 332 |
Cutting data for the WNMG 060408 insert for cast iron and hardened materials
finish, semi-finish, and rough turning — ISO groups K and H
| 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] | |
| 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 060408 turning insert is a double-sided indexable insert made of grade H5115 cemented carbide, designed primarily for turning cast iron. The W shape, a trigon with a 80° corner angle, combines edge strength with good access to the workpiece profile. The negative geometry with a 0° clearance angle allows both sides of the insert to be used — a total of six cutting edges. The nose radius rε of 0.8 mm is a general-purpose option that balances surface finish with edge durability during rough and semi-finish turning.
Grade H5115 is a cemented carbide with a CVD-applied coating selected for machining cast iron in ISO group K. The coating increases wear resistance and allows high cutting speeds to be maintained without rapid edge wear. The insert covers gray, ductile, and malleable cast iron, and also handles hardened materials at reduced cutting parameters. This allows a single stock item to cover both initial roughing passes and semi-finishing operations on the same workpiece. The double-sided design with three corners per side provides six indexable edges, resulting in a low cost per edge in series production.
Key advantages of the H5115 cemented carbide insert
- Six cutting edges — 3 trigon corners on each of the two sides reduce the cost per cutting edge compared with single-sided inserts.
- Grade H5115 with CVD coating — carbide for ISO group K, covering gray, ductile, and malleable cast iron, with cutting speeds reaching approximately 400 m/min.
- Corner radius rε 0.8 mm — one version for roughing and semi-finishing without changing the insert between operations.
- The 80° corner angle provides a strong, well-supported edge that resists chipping in interrupted cutting.
- Tolerance class M ensures repeatable edge positioning after indexing the insert in the holder pocket.
- The hole with a chip breaker on both sides (type G according to ISO 1832) controls chip flow when turning cast iron.
Applications and cutting data selection for the trigon insert
The WNMG 060408 insert (also written without a space as wnmg060408) is suitable for turning housings, pulleys, bushings, and flanges made of gray and ductile cast iron. Calculate spindle speed using n = 1000·Vc/(π·D): for a workpiece with a diameter of 80 mm at Vc = 250 m/min, the result is approximately 995 rpm. When roughing cast iron, maintain a feed rate of up to 0.4 mm/rev and a depth of cut of up to 4 mm, selecting the speed from the cutting data table. For interrupted cutting and machining through casting skin, reduce the speed and ensure rigid workpiece clamping to minimize corner chipping. Grade H5115 indexable inserts are supplied by the Korean brand Horn.
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Application limitation
Grade H5115 with a CVD coating is optimized for cast iron (group ISO K). When turning hardened materials, stay within the lower speed ranges in the table and maintain stable clamping — the thick CVD coating is less resistant to impacts during interrupted hard turning.
Trigon insert designation decoder according to ISO 1832
how to read the WNMG 060408 code — positions 1–7 of the designation
Designation WNMG 060408 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 — external and internal turning
TWLNR/L 1616 H0616×16 × 100 mmR right-hand
←L left-hand
→
←L left-hand
→
TWLNR/L 2020 K0620×20 × 125 mmR right-hand
←L left-hand
→
←L left-hand
→
TWLNR/L 2525 M0625×25 × 150 mmR right-hand
←L left-hand
→
←L left-hand
→
MWLNR/L 1616 H0616×16 × 100 mmR right-hand
←L left-hand
→
←L left-hand
→
MWLNR/L 2020 K0620×20 × 125 mmR right-hand
←L left-hand
→
←L left-hand
→
MWLNR/L 2525 M0625×25 × 150 mmR right-hand
←L left-hand
→
←L left-hand
→
MWDNN 1616 H0616×16 × 100 mmR right-hand
←L left-hand
→
←L left-hand
→
MWDNN 2020 K0620×20 × 125 mmR right-hand
←L left-hand
→
←L left-hand
→
MWDNN 2525 M0625×25 × 150 mmR right-hand
←L left-hand
→
←L left-hand
→
S20R TWLNR/L-06Ø20 | Ømin 25 mm | L=200R right-hand
←L left-hand
→
←L left-hand
→
S25S TWLNR/L-06Ø25 | Ømin 32 mm | L=250R right-hand
←L left-hand
→
←L left-hand
→
S32T TWLNR/L-06Ø32 | Ømin 40 mm | L=300R right-hand
←L left-hand
→
←L left-hand
→
S16P MWLNR/L-06Ø16 | Ømin 21 mm | L=170R right-hand
←L left-hand
→
←L left-hand
→
S20R MWLNR/L-06Ø20 | Ømin 25 mm | L=200R right-hand
←L left-hand
→
←L left-hand
→
S25S MWLNR/L-06Ø25 | Ømin 32 mm | L=250R right-hand
←L left-hand
→
←L left-hand
→
Frequently asked questions about the WNMG 060408 insert
number of edges, turning tool selection, and cutting data for turning cast iron
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 9.525 mm): for external turning TWLNR/L and MWLNR/L (entering angle 95°) and MWDNN with cross sections of 16×16–25×25 mm; for internal turning, boring bars S16P–S32T with a TWLNR/L or MWLNR/L head.
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 other dimensions (IC 9.525 mm, thickness 4.76 mm) are identical throughout the WNMG 0604 family.
Yes — grade H5115 covers group ISO K: gray, ductile, and malleable cast iron. The CVD coating allows turning at cutting speeds reaching 400 m/min; for roughing, use a feed rate of up to 0.4 mm/rev and a depth of cut of up to 4 mm.
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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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