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Description
VNMG 160404 turning insert – indexable 35° rhombus
| Technical data | |
|---|---|
| Side length l | 16.6 mm |
| Insert thickness s | 4.76 mm |
| Hole diameter d1 | 3.81 mm |
| Corner radius rε | 0.4 mm |
| ANSI code | VNMG 331 |
| Inscribed circle diameter IC | 9.525 mm |
Cutting data for the VNMG 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 | 1 | 170-240 | 0.25 | 3 | 150-215 | 0.3 | 4 |
| MStainless steel | 110-230 | 0.1 | 1 | 70-175 | 0.25 | 3 | 50-135 | 0.3 | 4 |
Grade H6310 cemented carbide indexable insert – applications and construction
double-sided 35° diamond with a hole and chip breaker
The VNMG 160404 turning insert is a double-sided, indexable diamond insert made of grade H6310 cemented carbide, designed for turning steel and stainless steel. The V shape, a diamond with a 35° corner angle, enables machining of profiles and undercuts that inserts with obtuse corners cannot reach. The negative geometry with a 0° clearance angle allows both sides of the insert to be used — a total of four cutting edges. The nose radius rε of 0.4 mm makes it the finishing variant in the VNMG 1604 family, for precision passes at low feed rates. The hole and chip breaker on both sides (type G according to ISO 1832) control chip flow and chip breaking during longitudinal and copy turning.
Key advantages of the H6310 cemented carbide insert
- Four cutting edges — 2 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 0.4 mm — finishing variant: the short active cutting edge produces a smooth surface at feed rates of around 0.1–0.25 mm/rev.
- The 35° corner angle facilitates form and copy turning and access to undercuts that are inaccessible to 55° and 80° diamond inserts.
- Tolerance class M ensures repeatable cutting edge positioning after indexing the insert in the holder pocket.
- Dimensions according to ISO 1832: cutting edge length 16.6 mm, IC 9.525 mm (3/8″), thickness 4.76 mm — compatible with holders with a 16 diamond pocket.
Applications and cutting data selection for the diamond-shaped insert
The sharp 35° corner angle makes VNMG 160404 suitable for form turning, copy turning and machining thin flanges, where tool access to narrow areas of the workpiece matters. The shorter active cutting edge reduces cutting forces, which helps when machining slender shafts prone to vibration. The chip breaker on both sides breaks chips into short segments and protects the machined surface from scratches. However, the narrower corner is more sensitive to thermal loads, so maintain a constant coolant supply and avoid interruptions in cutting when machining austenitic stainless steel.
The VNMG 160404 insert (also written without a space as vnmg160404) covers finish turning of shafts, bushings and pins made of structural steels, as well as stainless steel components. As an indexable cemented carbide insert, it replaces several solid tools and reduces changeover time. Calculate spindle speed using n = 1000·Vc/(π·D): for a shaft with a diameter of 50 mm at Vc = 200 m/min, the result is approximately 1273 rpm. When machining stainless steel, maintain a cutting speed of 110–230 m/min and a constant feed rate to reduce work hardening of the layer being cut. Grade H6310 cutting inserts 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 VNMG 160404 CBN with a cubic boron nitride cutting edge.
Rhombic insert designation decoder according to ISO 1832
how to read the VNMG 160404 code — positions 1–7 of the designation
Designation VNMG 160404 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 16 diamond pocket — external turning and boring
TVJNR/L 2020 K1620×20 × 125 mmR right-hand
←L left-hand
→
←L left-hand
→
TVJNR/L 2525 M1625×25 × 150 mmR right-hand
←L left-hand
→
←L left-hand
→
TVJNR/L 3232 P1632×32 × 170 mmR right-hand
←L left-hand
→
←L left-hand
→
TVJNR/L 4040 S1640×40 × 250 mmR right-hand
←L left-hand
→
←L left-hand
→
TVHNR/L 2020 K1620×20 × 125 mmR right-hand
←L left-hand
→
←L left-hand
→
TVHNR/L 2525 M1625×25 × 150 mmR right-hand
←L left-hand
→
←L left-hand
→
TVHNR/L 3232 P1632×32 × 170 mmR right-hand
←L left-hand
→
←L left-hand
→
TVVNN 2020 K1620×20 × 125 mmNeutral
↔
↔
TVVNN 2525 M1625×25 × 150 mmNeutral
↔
↔
TVVNN 3232 P1632×32 × 170 mmNeutral
↔
↔
TVVNN 4040 S1640×40 × 250 mmNeutral
↔
↔
S25S TVUNR/L-16Ø25 × 250 mmR right-hand
←L left-hand
→
←L left-hand
→
S32T TVUNR/L-16Ø32 × 300 mmR right-hand
←L left-hand
→
←L left-hand
→
S40U TVUNR/L-16Ø40 × 350 mmR right-hand
←L left-hand
→
←L left-hand
→
S50V TVUNR/L-16Ø50 × 400 mmR right-hand
←L left-hand
→
←L left-hand
→
Frequently asked questions about the VNMG 160404 insert
use, turning tool selection, and turning parameters
Four — the diamond has 2 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 16 diamond-shaped pocket (IC 9.525 mm): for external turning TVJNR/L (entering angle 93°), TVHNR/L (107.5°) and neutral TVVNN with shank cross sections of 20×20–40×40 mm; for boring, boring bars S25S–S50V with a TVUNR/L head.
Only in corner radius: 0.4 mm is a finishing variant for precision passes at low feed rates, while 0.8 mm is a general-purpose variant with a stronger cutting edge. The other dimensions (IC 9.525 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.
Product accessories
Carbide insert VNMG 160408 HS H6310 Horn
Reference: 0000009635 In stock > 10 items
€7.11
€8.74 brutto
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Shipping
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| 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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