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Carbide insert CCMT 09T308 H6310 Horn - Turning inserts - nr. 1
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  • Carbide insert CCMT 09T308 H6310 Horn - Turning inserts - nr. 1
  • Carbide insert CCMT 09T308 H6310 Horn - Turning inserts - nr. 2
Horn

Carbide insert CCMT 09T308 H6310 Horn

Horn Horn
0000003710
Cutting edge length: 092 sizes of this insert
0912
€4.69 tax inc.

Net price: €3.82

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Description

CCMT 09T308 turning insert – single-sided 80° rhombus

Technical data
Side length l 9.7 mm
Insert thickness s 3.97 mm
Hole diameter d1 4.4 mm
Corner radius rε 0.8 mm
ANSI code CCMT 32.52
CCMT 09T308 indexable turning insert in H6310 cemented carbide, single-sided 80° rhombus with a hole and chip breaker

Cutting data for the CCMT 09T308 insert for steel and stainless steel

finishing and semi-finishing — ISO groups P and M

MaterialFinishingSemi-finishing
Vc [m/min]Feed f [mm/rev]ap [mm]Vc [m/min]Feed f [mm/rev]ap [mm]
PSteel 180-300 0.05-0.2 0.1-1.65 180-300 0.12-0.21 0.5-3
MStainless steel 90-150 0.05-0.2 0.1-1.65 90-150 0.12-0.21 0.5-3

Grade H6310 cemented carbide indexable insert – applications and construction

single-sided 80° diamond with a hole and chip breaker

The CCMT 09T308 turning insert is a single-sided, rhombic indexable insert made of grade H6310 cemented carbide, designed for turning steel and stainless steel. Shape C, a rhombus with a 80° corner angle, combines a strong, rigid corner with good contour access during longitudinal turning and facing. The positive geometry with a 7° clearance angle reduces cutting forces, making the insert suitable for smaller lathes, slender workpieces, and boring. The countersunk hole for the clamping screw ensures stable seating in the holder pocket. Two corners and a single-sided chip breaker provide a total of two cutting edges per insert. The thin PVD coating increases the cutting edge's resistance to wear and elevated temperatures during cutting.

Key advantages of the H6310 cemented carbide insert

  • Two cutting edges — 2 corners of 80° each on one side of the insert; once an edge is dull, simply index the insert in its seat without changing the holder.
  • Grade H6310 for ISO groups P and M — PVD-coated carbide for steel (P20-P40) and stainless steel (M20-M40), and occasionally cast iron.
  • 80° corner — rigid and strong, it allows longitudinal turning, facing, and light profiling with the same cutting edge.
  • The positive geometry with a 7° clearance angle reduces cutting resistance and power consumption — suitable for smaller lathes and boring.
  • The corner radius rε of 0.8 mm is a general-purpose option: it combines a smooth surface finish with cutting edge strength at feed rates up to 0.2 mm/rev.
  • Dimensions according to ISO 1832: side length l 9.7 mm, IC 9.525 mm (3/8″), thickness 3.97 mm — compatible with holders featuring a 09 pocket.

Applications and cutting data selection for the diamond-shaped insert

The CCMT 09T308 insert (also written without a space as CCMT09T308) is suitable for turning and boring shafts, bushings, and flanges made of structural steels, as well as stainless steel components. Calculate spindle speed using the formula n = 1000·Vc/(π·D): for a shaft diameter of 40 mm at Vc = 200 m/min, the result is approximately 1592 rpm. As the workpiece diameter decreases during a pass, increase spindle speed to maintain a constant cutting speed at the edge. For structural steels, start at the midpoint of the Vc range and adjust according to workpiece clamping rigidity. Indexable inserts in grade H6310 are supplied by the Korean brand Horn.

For stainless steel, maintain a cutting speed of 90–150 m/min, a constant feed rate, and a continuous supply of emulsion coolant — austenitic steel dissipates heat poorly and work-hardens when cutting is too slow. The positive geometry and single-sided chip breaker control chip flow and breaking during finishing and semi-finishing. For deeper passes in structural steel, select the feed rate and depth of cut from the cutting data table, staying within the range recommended for the specific chip breaker. Secure insert clamping with a screw through the countersunk hole reduces vibration and protects the cutting edge when machining slender workpieces.

▲
Application limitation

Insert CCMT 09T308 is single-sided and positive — it provides only 2 cutting edges and geometry designed for finishing and semi-finishing. For heavy roughing at large depths of cut and interrupted cuts, select a stronger double-sided insert for a negative pocket (e.g. CNMG).

Rhombic insert designation decoder according to ISO 1832

how to read the CCMT 09T308 code — positions 1–7 of the designation

Designation CCMT 09T308 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

1Cshape 2Cangle α 3Mtolerance 4Ttype – 509size 6T3thickness 708radius rε

Positions 1–4 · ISO code

1CShape

80° rhombus

2 corners of 80° 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]

509Size

l = 9.7 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: CCMT 09T308 = 80° diamond · positive 7° · class M · countersunk hole and chip breaker · IC 9.525 mm (l 9.7 mm) · s 3.97 mm · rε 0.8 mm

Compatible turning tools

holders with a 09 diamond-shaped pocket — external and internal turning

SCLCR/L 1212 F0912×12 × 80 mmR right-hand
←L left-hand
→
SCLCR/L 1616 H0916×16 × 100 mmR right-hand
←L left-hand
→
SCLCR/L 2020 K0920×20 × 125 mmR right-hand
←L left-hand
→
SCLCR/L 2525 M0925×25 × 150 mmR right-hand
←L left-hand
→
SCMCN 1212 F0912×12 × 80 mmR right-hand
←L left-hand
→
SCMCN 1616 H0916×16 × 100 mmR right-hand
←L left-hand
→
SCMCN 2020 K0920×20 × 125 mmR right-hand
←L left-hand
→
SCMCN 2525 M0925×25 × 150 mmR right-hand
←L left-hand
→
SCACR/L 1212 F0912×12 × 80 mmR right-hand
←L left-hand
→
SCACR/L 1616 H0916×16 × 100 mmR right-hand
←L left-hand
→
SCACR/L 2020 K0920×20 × 125 mmR right-hand
←L left-hand
→
SCACR/L 2525 M0925×25 × 150 mmR right-hand
←L left-hand
→
S12K SCLCR/L-09Ø12 | Ømin 16 mm | L=125R right-hand
←L left-hand
→
S16P SCLCR/L-09Ø16 | Ømin 21 mm | L=170R right-hand
←L left-hand
→
S20R SCLCR/L-09Ø20 | Ømin 25 mm | L=200R right-hand
←L left-hand
→
S25S SCLCR/L-09Ø25 | Ømin 32 mm | L=250R right-hand
←L left-hand
→
S32T SCLCR/L-09Ø32 | Ømin 40 mm | L=300R right-hand
←L left-hand
→
S12K SCFCR/L-09Ø12 | Ømin 16 mm | L=125R right-hand
←L left-hand
→
S16P SCFCR/L-09Ø16 | Ømin 21 mm | L=170R right-hand
←L left-hand
→
S20R SCFCR/L-09Ø20 | Ømin 25 mm | L=200R right-hand
←L left-hand
→
S25S SCFCR/L-09Ø25 | Ømin 32 mm | L=250R right-hand
←L left-hand
→
S32T SCFCR/L-09Ø32 | Ømin 40 mm | L=300R right-hand
←L left-hand
→

Frequently asked questions about the CCMT 09T308 insert

use, turning tool selection, and turning parameters

Two — the 80° diamond has 2 corners, and the positive, single-sided geometry (7° clearance angle) uses only one side of the insert. Once a cutting edge is dull, simply index the insert in its seat without changing the holder.

Holders with a 09 diamond-shaped pocket (IC 9.525 mm): for external turning SCLCR/L, SCMCN and SCACR/L with cross sections of 12×12–25×25 mm; for internal turning, boring bars S12K–S32T with the suffix SCLCR/L or SCFCR/L. The letter R denotes the right-hand version, and L the left-hand version.

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 higher feed rates and deeper passes. The remaining dimensions (IC 9.525 mm, thickness 3.97 mm) are identical.

Yes — grade H6310 covers group ISO M20-M40. Maintain a cutting speed of 90–150 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 CCMT 09T308 H6310 Horn

Carbide insert CCMT 09T308 H6310 Horn

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