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Carbide insert DCMT 11T304 H6310 Horn - Turning inserts
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  • Carbide insert DCMT 11T304 H6310 Horn - Turning inserts
  • Carbide insert DCMT 11T304 H6310 Horn - Turning inserts - nr. 1
Horn

Carbide insert DCMT 11T304 H6310 Horn

Horn Horn
13563
Cutting edge length: 112 sizes of this insert
07 mm11
€4.86 tax inc.

Net price: €3.95

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W magazynie: +100 szt.


W magazynie: +100 szt.

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

Description

DCMT 11T304 turning insert – single-sided 55° diamond

Technical data
Side length l 11.6 mm
Insert thickness s 3.97 mm
Hole diameter d1 4.4 mm
Corner radius rε 0.4 mm
ANSI code DCMT 32.51
DCMT 11T304 indexable turning insert made of H6310 cemented carbide, single-sided 55° diamond with a hole, countersink and chip breaker

Cutting data for the DCMT 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 120-225 0.04 0.08 105-220 0.08 0.35 100-200 0.15 2
MStainless steel 124-216 0.04 0.08 120-210 0.08 0.35 110-210 0.15 2

Grade H6310 cemented carbide indexable insert – applications and construction

single-sided 55° diamond with a hole, countersink and chip breaker

The DCMT 11T304 turning insert is a single-sided, diamond-shaped indexable insert made of H6310 grade cemented carbide, designed for turning steel and stainless steel. The D shape, a diamond with a 55° included angle, facilitates machining of contours and undercuts during longitudinal and copy turning. Positive geometry with a 7° clearance angle (letter C) reduces cutting resistance and promotes light, precise machining. The insert uses one side — two sharp 55° corners. The nose radius rε 0.4 mm provides a smooth surface at low feed rates, while the hole with a countersink and single-sided chip breaker (type T according to ISO 1832) controls chip flow and breaking. The PVD coating improves edge resistance to abrasive wear and rising temperatures in the cutting zone. Low cutting forces make this insert a good choice for less rigid lathes and slender, thin-walled workpieces prone to deformation and vibration.

Key features of the H6310 cemented carbide insert

  • Two cutting edges — 2 sharp 55° corners on one side of the insert, a balanced compromise between the number of cutting edges and access to narrow contours.
  • 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 0.4 mm — finishing and semi-finishing with a high-quality surface finish at low feed rates.
  • Positive 7° geometry reduces cutting forces and vibration on slender and thin-walled workpieces.
  • Dimensions according to ISO 1832: edge length 11.6 mm, IC 9.525 mm (3/8″), thickness 3.97 mm — compatible with holders with a D 11 pocket.
  • The acute 55° included angle enables copy turning and access to undercuts that are inaccessible to inserts with a 80° or 90° included angle.

Applications and cutting data selection for the diamond-shaped insert

The DCMT 11T304 insert (also written without spaces as dcmt11t304) is suitable for finishing shafts, bushings, and contoured parts made of structural steels, as well as stainless steel components. As a cutting insert for indexable turning tools, it is suitable for typical external and internal turning operations. Calculate spindle speed using n = 1000·Vc/(π·D): for a shaft with a diameter of 30 mm at Vc = 200 m/min, the result is approximately 2122 rpm. For a smaller diameter of 16 mm at the same cutting speed, the result is approximately 3979 rpm, so adjust spindle speed to the current workpiece diameter. For stainless steels, maintain a cutting speed of 124–216 m/min and a constant feed to minimize work hardening of the material being cut. Keep the depth of cut within the finishing and semi-finishing range, and control chip flow with a continuous coolant supply. These indexable inserts in grade H6310 are supplied by the Korean brand Horn.

▲
Application limitation

The positive, single-sided DCMT insert with rε 0.4 mm is selected for finishing and semi-finishing — not for heavy roughing or turning hardened steels above 45 HRC. For hard turning, choose a version with a cubic boron nitride (CBN) cutting edge.

Rhombic insert designation decoder according to ISO 1832

how to read the DCMT 11T304 code — designation positions 1–7

Designation DCMT 11T304 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

1Dshape 2Cangle α 3Mtolerance 4Ttype – 511size 6T3thickness 704radius rε

Positions 1–4 · ISO code

1DShape

55° rhombus

2 corners of 55° per side

2CClearance angle

α = 7°

positive, single-sided

3MTolerance

Class M (intermediate)

IC ±0.05 · thickness ±0.13 mm

4TType

Countersunk hole + chip breaker

countersink 40–60°, single-sided chip breaker

Positions 5–7 · dimensions [mm]

511Size

l = 11.6 mm

IC = 9.525 mm · 3/8″

6T3Thickness

s = 3.97 mm

between rake faces

704Corner radius

rε = 0.4 mm

code ÷ 10 → radius in mm

✓ 2 corners × 1 side = 2 cutting edges

Full designation: DCMT 11T304 = 55° diamond · positive 7° · class M · countersunk hole and chip breaker · IC 9.525 mm (l 11.6 mm) · s 3.97 mm · rε 0.4 mm

Compatible turning tools

holders with a 11 diamond-shaped pocket — external and internal turning

SDHCR/L 1616 H1116×16 × 100 mmR right-hand
←L left-hand
→
SDHCR/L 2020 K1120×20 × 125 mmR right-hand
←L left-hand
→
SDHCR/L 2525 M1125×25 × 150 mmR right-hand
←L left-hand
→
SDHCR/L 3232 P1132×32 × 170 mmR right-hand
←L left-hand
→
SDJCR/L 1212 F1112×12 × 80 mmR right-hand
←L left-hand
→
SDJCR/L 1616 H1116×16 × 100 mmR right-hand
←L left-hand
→
SDJCR/L 2020 K1120×20 × 125 mmR right-hand
←L left-hand
→
SDJCR/L 2525 M1125×25 × 150 mmR right-hand
←L left-hand
→
SDJCR/L 3232 P1132×32 × 170 mmR right-hand
←L left-hand
→
SDNCN 1212 F1112×12 × 80 mmR right-hand
←L left-hand
→
SDNCN 1616 H1116×16 × 100 mmR right-hand
←L left-hand
→
SDNCN 2020 K1120×20 × 125 mmR right-hand
←L left-hand
→
SDNCN 2525 M1125×25 × 150 mmR right-hand
←L left-hand
→
SDNCN 3232 P1132×32 × 170 mmR right-hand
←L left-hand
→
S16P SDXCR/L-11Ø16 | Ømin 21 mm | L=170R right-hand
←L left-hand
→
S20R SDXCR/L-11Ø20 | Ømin 25 mm | L=200R right-hand
←L left-hand
→
S25S SDXCR/L-11Ø25 | Ømin 32 mm | L=250R right-hand
←L left-hand
→
S32T SDXCR/L-11Ø32 | Ømin 40 mm | L=300R right-hand
←L left-hand
→
S40U SDXCR/L-11Ø40 | Ømin 50 mm | L=350R right-hand
←L left-hand
→
S16P SDPCR/L-11Ø16 | Ømin 21 mm | L=170R right-hand
←L left-hand
→
S20R SDPCR/L-11Ø20 | Ømin 25 mm | L=200R right-hand
←L left-hand
→
S25S SDPCR/L-11Ø25 | Ømin 32 mm | L=250R right-hand
←L left-hand
→
S32T SDPCR/L-11Ø32 | Ømin 40 mm | L=300R right-hand
←L left-hand
→
S40U SDPCR/L-11Ø40 | Ømin 50 mm | L=350R right-hand
←L left-hand
→
S16P SD-CR/L-11Ø16 | Ømin 21 mm | L=170R right-hand
←L left-hand
→
S20R SD-CR/L-11Ø20 | Ømin 25 mm | L=200R right-hand
←L left-hand
→
S25S SD-CR/L-11Ø25 | Ømin 32 mm | L=250R right-hand
←L left-hand
→
S32T SD-CR/L-11Ø32 | Ømin 40 mm | L=300R right-hand
←L left-hand
→
S40U SD-CR/L-11Ø40 | Ømin 50 mm | L=350R right-hand
←L left-hand
→
S16P SDQCR/L-11Ø16 | Ømin 21 mm | L=170R right-hand
←L left-hand
→
S20R SDQCR/L-11Ø20 | Ømin 25 mm | L=200R right-hand
←L left-hand
→
S25S SDQCR/L-11Ø25 | Ømin 32 mm | L=250R right-hand
←L left-hand
→
S32T SDQCR/L-11Ø32 | Ømin 40 mm | L=300R right-hand
←L left-hand
→
S40U SDQCR/L-11Ø40 | Ømin 50 mm | L=350R right-hand
←L left-hand
→
S16P SDUCR/L-11Ø16 | Ømin 21 mm | L=170R right-hand
←L left-hand
→
S20R SDUCR/L-11Ø20 | Ømin 25 mm | L=200R right-hand
←L left-hand
→
S25S SDUCR/L-11Ø25 | Ømin 32 mm | L=250R right-hand
←L left-hand
→
S32T SDUCR/L-11Ø32 | Ømin 40 mm | L=300R right-hand
←L left-hand
→
S40U SDUCR/L-11Ø40 | Ømin 50 mm | L=350R right-hand
←L left-hand
→

Frequently asked questions about the DCMT 11T304 insert

use, turning tool selection, and turning parameters

Two — the 55° diamond has 2 acute corners, and the positive, single-sided geometry allows cutting only with the top side of the insert. Once one corner becomes dull, simply index the insert in its pocket to use the second cutting edge.

Holders with a 11 diamond-shaped pocket (IC 9.525 mm): for external turning SDHCR/L, SDJCR/L and SDNCN with cross sections of 12×12–32×32 mm; for internal turning, boring bars S16P–S40U with the suffix SDXCR/L, SDPCR/L, SD-CR/L, SDQCR/L, or SDUCR/L. The full list is available in the compatible turning tools section.

Only in corner radius: 0.4 mm (code 04) is used for finishing at low feeds and provides a smoother surface, while 0.8 mm (code 08) is a more versatile version with greater strength at higher feeds. The other dimensions (IC 9.525 mm, thickness 3.97 mm) are identical throughout the DCMT 11T3 family.

Yes — grade H6310 covers group ISO M20-M40. Maintain a cutting speed of 124–216 m/min, a constant feed, and continuous emulsion cooling: austenitic steel conducts heat poorly and work-hardens when cutting is too slow.

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Carbide insert DCMT 11T304 H6310 Horn

Carbide insert DCMT 11T304 H6310 Horn


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