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Carbide insert TNMG 160412 H6310 Horn - Carbide insert lathe
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  • Carbide insert TNMG 160412 H6310 Horn - Carbide insert lathe
  • Carbide insert TNMG 160412 H6310 Horn - Carbide insert lathe - nr. 1
Horn

Carbide insert TNMG 160412 H6310 Horn

Horn Horn
277371
Cutting edge length: 162 sizes of this insert
1622
€6.15 tax inc.

Net price: €5.00

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

Description

TNMG 160412 turning insert – indexable 60° triangle for roughing

Technical data
Side length l 16.5 mm
Insert thickness s 4.76 mm
Hole diameter d1 3.81 mm
Corner radius rε 1.2 mm
ANSI code TNMG 333
TNMG 160412 indexable turning insert made of H6310 cemented carbide, double-sided 60° triangle with a hole and chip breaker for rough turning

Cutting data for the TNMG 160412 insert for steel and stainless steel

finishing, semi-finishing and roughing — ISO P and M groups

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]
PSteel 250-350 0.15 0.2 180-270 0.3 1 170-220 0.6 2.5
MStainless steel 125-260 0.15 0.2 100-220 0.3 1 80-200 0.6 2.5

Grade H6310 cemented carbide indexable insert – applications and construction

double-sided 60° triangle with an enlarged 1.2 mm nose radius for rough turning

The TNMG 160412 turning insert is a double-sided, triangular indexable insert made of grade H6310 cemented carbide, designed for rough turning of steel and stainless steel. Shape T, an equilateral triangle with a 60° corner angle, provides easier access to the workpiece contour during longitudinal turning and facing. Negative geometry with a 0° clearance angle allows both sides of the insert to be used — a total of six cutting edges. The enlarged nose radius rε of 1.2 mm strengthens the cutting tip and handles heavy stock removal and feed rates up to 0.6 mm/rev. A hole with a chip breaker on both sides (type G according to ISO 1832) controls chip flow and breaking.

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 1.2 mm — the roughing version in the family, with a strong tip for large depths of cut and interrupted cutting.
  • Tolerance class M, with an inscribed circle IC tolerance of ±0.05 mm, ensures repeatable cutting edge positioning after indexing the insert in its pocket.
  • Dimensions according to ISO 1832: edge length 16.5 mm, IC 9.525 mm (3/8″), thickness 4.76 mm — fit holders with a 16 pocket.
  • A 60° corner angle produces lower radial forces than a 80° corner — less vibration on slender workpieces.

Applications and parameter selection for the triangular insert

The enlarged 1.2 mm nose radius distributes the load over a longer section of the edge, allowing it to withstand interrupted cutting and large depths of cut more reliably. This is the roughing version in the TNMG 1604 family — when removing 1.5–2.5 mm of stock, it runs more stably than inserts with a 0.4 or 0.8 mm radius. The larger radius increases radial forces, so on slender shafts it is advisable to reduce the depth of cut or support the workpiece with a center. Six cutting edges reduce the cost per edge in series production.

The TNMG 160412 insert (also written without a space as TNMG160412) is suitable for rough turning of shafts, bushings and forgings made of structural steels, as well as stainless steel components. Calculate spindle speed using n = 1000·Vc/(π·D): for a shaft diameter of 80 mm at Vc = 200 m/min, the result is approximately 796 rpm. When machining stainless steels, maintain a cutting speed of 80–200 m/min and a constant feed rate to avoid work hardening of the layer being cut. Grade H6310 indexable inserts are supplied by the Korean brand Horn.

▲
Application limitation

Grade H6310 is not intended for steels hardened above 45 HRC — for hard turning, choose a version with a cubic boron nitride cutting edge CBN. For fine finishing at a low feed rate, a version with a smaller nose radius is more suitable.

Triangular insert designation decoder according to ISO 1832

how to read the TNMG 160412 code — positions 1–7 of the designation

Designation TNMG 160412 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

1Tshape 2Nangle α 3Mtolerance 4Gtype – 516size 604thickness 712radius rε

Positions 1–4 · ISO code

1TShape

60° triangle

3 corners of 60° per side

2NClearance angle

α = 0°

negative, double-sided

3MTolerance

Class M (intermediate)

IC ±0.05 · thickness ±0.13 mm

4GType

Hole + chip breaker

chip breaker on both sides

Positions 5–7 · dimensions [mm]

516Size

l = 16.5 mm

IC = 9.525 mm · 3/8″

604Thickness

s = 4.76 mm

between rake faces

712Corner radius

rε = 1.2 mm

code ÷ 10 → radius in mm

✓ 3 corners × 2 sides = 6 cutting edges

Full designation: TNMG 160412 = 60° triangle · negative · class M · hole and chip breaker · IC 9.525 mm (l 16.5 mm) · s 4.76 mm · rε 1.2 mm

Compatible turning tools

holders with a 16 triangular pocket — external and internal turning

TTJNR/L 2020 K1620×20 × 125 mmR right-hand
←L left-hand
→
TTJNR/L 2525 M1625×25 × 150 mmR right-hand
←L left-hand
→
TTJNR/L 3232 P1632×32 × 170 mmR right-hand
←L left-hand
→
TTENN 2020 K1620×20 × 125 mmNeutral
↔
TTENN 2525 M1625×25 × 150 mmNeutral
↔
TTENN 3232 P1632×32 × 170 mmNeutral
↔
TTGNR/L 2020 K1620×20 × 125 mmR right-hand
←L left-hand
→
TTGNR/L 2525 M1625×25 × 150 mmR right-hand
←L left-hand
→
TTGNR/L 3232 P1632×32 × 170 mmR right-hand
←L left-hand
→
TTFNR/L 2020 K1620×20 × 125 mmR right-hand
←L left-hand
→
TTFNR/L 2525 M1625×25 × 150 mmR right-hand
←L left-hand
→
TTFNR/L 3232 P1632×32 × 170 mmR right-hand
←L left-hand
→
MTJNR/L 2020 K1620×20 × 125 mmR right-hand
←L left-hand
→
MTJNR/L 2525 M1625×25 × 150 mmR right-hand
←L left-hand
→
MTJNR/L 3232 P1632×32 × 170 mmR right-hand
←L left-hand
→
MTENN 2020 K1620×20 × 125 mmNeutral
↔
MTENN 2525 M1625×25 × 150 mmNeutral
↔
MTENN 3232 P1632×32 × 170 mmNeutral
↔
S25S TTUNR/L-16ø25 × 250 mm | D min ≥32R right-hand
←L left-hand
→
S32T TTUNR/L-16ø32 × 300 mm | D min ≥40R right-hand
←L left-hand
→
S25S TT-NR/L-16ø25 × 250 mm | D min ≥32R right-hand
←L left-hand
→
S32T TT-NR/L-16ø32 × 300 mm | D min ≥40R right-hand
←L left-hand
→
S20R MTUNR/L-16ø20 × 200 mm | D min ≥25R right-hand
←L left-hand
→
S25S MTUNR/L-16ø25 × 250 mm | D min ≥32R right-hand
←L left-hand
→
S32T MTUNR/L-16ø32 × 300 mm | D min ≥40R right-hand
←L left-hand
→
S40U MTUNR/L-16ø40 × 350 mm | D min ≥50R right-hand
←L left-hand
→
S20R MTQNR/L-16ø20 × 200 mm | D min ≥25R right-hand
←L left-hand
→
S25S MTQNR/L-16ø25 × 250 mm | D min ≥32R right-hand
←L left-hand
→
S32T MTQNR/L-16ø32 × 300 mm | D min ≥40R right-hand
←L left-hand
→
S40U MTQNR/L-16ø40 × 350 mm | D min ≥50R right-hand
←L left-hand
→

Frequently asked questions about the TNMG 160412 insert

use, turning tool selection, and turning parameters

Six — the triangle 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 16 triangular pocket (IC 9.525 mm): for external turning TTJNR/L and MTJNR/L (entering angle 93°), TTFNR/L and TTGNR/L (90°) and TTENN and MTENN (60°) with shank cross sections of 20×20–32×32 mm; for internal turning, boring bars S20R–S40U with a TTUNR/L, MTUNR/L or MTQNR/L designation suffix.

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 (160412) is selected for roughing at feed rates up to 0.6 mm/rev and depths of cut up to 2.5 mm. The remaining dimensions (IC 9.525 mm, thickness 4.76 mm) are identical.

Yes — the enlarged nose radius 1.2 mm strengthens the cutting tip, allowing the insert to handle depths of cut up to 2.5 mm and feed rates up to 0.6 mm/rev. On slender shafts, reduce the depth of cut or use center support, because the larger radius increases radial forces.

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Carbide insert TNMG 160412 H6310 Horn

Carbide insert TNMG 160412 H6310 Horn

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