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Carbide insert DCGT 11T308 Aluminum K10 Horn
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  • Carbide insert DCGT 11T308 Aluminum K10 Horn
  • Carbide insert DCGT 11T308 Aluminum K10 Horn - nr. 1
Horn

Carbide insert DCGT 11T308 AL Horn

Horn Horn
0000009271
€4.69 tax inc.

Net price: €3.82

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Description

DCGT 11T308 turning insert – positive 55° rhombus

Technical data
Side length l 11.6 mm
Insert thickness s 3.97 mm
Hole diameter d1 4.4 mm
Corner radius rε 0.8 mm
ANSI code DCGT 32.52
DCGT 11T308 turning insert in K10 carbide, positive single-sided 55° rhombus with a hole, sharp polished edge for aluminum

Cutting data for the DCGT 11T308 insert for aluminum and nonferrous metals

finishing, semi-finishing, and roughing — ISO N group

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]
NAluminum and nonferrous materials 375-2400 0.15 0.1 40-240 0.22 2.55 40-240 0.5 5

K10 carbide positive insert – applications and design

single-sided 55° rhombus with a hole and chip breaker for aluminum

The DCGT 11T308 turning insert is a positive, single-sided rhombic insert made of fine-grained cemented carbide in grade K10, intended for turning aluminum and nonferrous metals. Shape D, a rhombus with a 55° corner angle, facilitates machining contours and profiles requiring access with an acute corner. The positive 7° clearance angle (letter C) indicates positive geometry — the insert cuts on one side and provides two cutting edges. The sharp, often polished edge reduces built-up edge formation and ensures a smooth surface with low cutting forces.

Key features of the K10 carbide indexable insert

  • Two cutting edges — 2 sharp 55° corners on one side of the insert; once worn, simply rotate the insert in the pocket without changing the tool holder.
  • Grade K10 for ISO group N — fine-grained carbide for aluminum, aluminum alloys, and nonferrous metals such as brass and bronze.
  • Positive geometry with a sharp edge — low cutting resistance and a reduced risk of built-up edge formation when machining ductile alloys.
  • The rε 0.8 mm corner radius combines a good surface finish with resistance to tip chipping.
  • Tolerance class G, indicating a ground profile, provides repeatable edge positioning after rotating the insert in the pocket.
  • Dimensions according to ISO 1832: cutting edge length 11.6 mm, IC 9.525 mm (3/8″), thickness 3.97 mm — compatible with holders with a 11 diamond pocket.

Applications and cutting data selection for the diamond-shaped insert

The DCGT 11T308 insert (also written without spaces as dcgt11t308) is suitable for turning aluminum alloy sleeves, pistons and housings, as well as brass and bronze components. Calculate spindle speed using the formula n = 1000·Vc/(π·D): for a shaft with a diameter of 40 mm at Vc = 600 m/min, the result is approximately 4775 rpm. The high cutting speeds permitted for aluminum require checking the maximum permissible spindle speed and the balance of the clamped workpiece beforehand. K10 grade indexable inserts are supplied by the Korean brand Horn.

The countersunk hole secures the insert with a clamping screw, while the single-sided chip breaker (type T according to ISO 1832) curls long, ductile aluminum chips and directs them away from the machining zone. Ground tolerance class G limits variation in cutting edge position after indexing, making it easier to maintain dimensions across a batch of parts. During wet turning, emulsion or cutting oil flushes away chips and prevents material from adhering to the polished rake face. The sharp, positive cutting edge geometry reduces cutting resistance, making the DCGT 11T308 insert suitable for machining thin-walled sleeves and parts prone to deformation.

▲
Application limitation

Grade K10 and the sharp, positive geometry are intended for nonferrous metals in group ISO N — not for steel or cast iron. For turning steel (group ISO P) choose a coated-grade insert with geometry suited to ferrous materials.

Rhombic insert designation decoder according to ISO 1832

how to read the DCGT 11T308 code — positions 1–7 of the designation

Designation DCGT 11T308 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 3Gtolerance 4Ttype – 511size 6T3thickness 708radius rε

Positions 1–4 · ISO code

1DShape

55° rhombus

2 corners of 55° per side

2CClearance angle

α = 7°

positive, single-sided

3GTolerance

Class G (ground)

IC ±0.025 · 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

708Corner radius

rε = 0.8 mm

code ÷ 10 → radius in mm

✓ 2 corners × 1 side = 2 cutting edges

Full designation: DCGT 11T308 = 55° diamond · positive 7° · class G · countersunk hole and chip breaker · IC 9.525 mm (l 11.6 mm) · s 3.97 mm · rε 0.8 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 DCGT 11T308 insert

number of cutting edges, tool selection, and workpiece materials

Two — the 55° diamond has 2 acute corners, and the positive geometry (7° clearance angle) makes the insert single-sided, using only its top face. Once one corner is worn, rotate the insert in its pocket to use the other without replacing the tool holder.

Holders with a 11 diamond-shaped pocket (IC 9.525 mm): for external turning SDHCR/L, SDJCR/L and SDNCN with shank cross sections from 12×12 to 32×32 mm; for internal turning, boring bars S16P–S40U with the suffix SDXCR/L, SDPCR/L, SDQCR/L, SDUCR/L or SD-CR/L. Select right-hand R or left-hand L versions according to the feed direction.

Mainly in nose radius rε: 0.4 mm is used for finishing and light stock removal at low feed rates, 0.8 mm is a general-purpose version, while larger radii increase tip strength for deeper cuts. The other dimensions (IC 9.525 mm, thickness 3.97 mm) remain the same within the family.

It is not intended for this purpose — grade K10 and the sharp, positive geometry are suited to group ISO N, meaning aluminum and nonferrous metals. For turning steel (group ISO P) use a coated-grade insert with geometry suited to ferrous materials.

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Carbide insert DCGT 11T308 AL Horn

Carbide insert DCGT 11T308 AL Horn

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