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Carbide insert CCMT 09T304 H6310 Horn - Turning inserts
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  • Carbide insert CCMT 09T304 H6310 Horn - Turning inserts
  • Carbide insert CCMT 09T304 H6310 Horn - Turning inserts - nr. 2
Horn

Carbide insert CCMT 09T304 H6310 Horn

Horn Horn
10418
Cutting edge length: 093 sizes of this insert
060912
€4.69 tax inc.

Net price: €3.82

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Description

CCMT 09T304 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 0.4 mm
ANSI code CCMT 32.51
CCMT 09T304 indexable turning insert in H6310 cemented carbide, single-sided 80° rhombus with a hole and chip breaker

Cutting data for the CCMT 09T304 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 09T304 turning insert is a single-sided, rhombic indexable insert made of grade H6310 cemented carbide, designed for turning steel and stainless steel. The C shape, a rhombus with a corner angle of 80°, combines cutting edge strength with good access to contours during longitudinal turning and facing. Positive geometry with a 7° clearance angle reduces cutting forces, allowing smooth cutting on slender shafts and thin-walled bushings. The rhombic shape provides two working corners on one side, giving two cutting edges. The nose radius rε of 0.4 mm favors precision machining and semi-finishing at low feed rates.

Key advantages of the H6310 cemented carbide insert

  • Two cutting edges — 2 corners of 80° on one side of the insert; positive geometry prevents use of the other side.
  • 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 — precision machining and semi-finishing with a smooth surface at low feed rates.
  • The positive clearance angle of 7° reduces friction and cutting forces, benefiting stainless steel and thin-walled workpieces.
  • Tolerance class M ensures repeatable edge positioning in the pocket after indexing the insert.
  • Dimensions according to ISO 1832: side length 9.7 mm, IC 9.525 mm (3/8″), thickness 3.97 mm — compatible with holders with a size 09 C-shaped insert pocket.

Applications and cutting data selection for the diamond-shaped insert

The CCMT 09T304 insert, also written without spaces as ccmt09t304, performs well in finishing and semi-finish turning of shafts, bushings, and flanges made of structural steels, as well as stainless steel components. Calculate spindle speed using n = 1000·Vc/(π·D): for a shaft diameter of 40 mm at Vc = 200 m/min, the result is approximately 1592 rpm. For stainless steels, maintain a cutting speed of 90–150 m/min and a constant feed rate to limit work hardening of the layer being cut and remove heat from the edge. The countersunk hole secures the insert with a clamping screw, while the single-sided chip breaker controls chip flow and breaking. Grade H6310 indexable inserts are supplied by the Korean brand Horn.

The small nose radius of 0.4 mm reduces radial force and improves surface finish, so select a feed rate below the radius value, preferably in the range of 0.05–0.2 mm/rev for precision machining. The positive, single-sided design places less load on the spindle than negative inserts, making it a good choice for light-duty lathes and finishing operations on CNC machines. PVD-coated grade H6310 covers ISO groups P20–P40 and M20–M40, and also performs well in occasional cast iron applications. For roughing or larger machining allowances, choose a version from the CCMT 09T3 family with a larger nose radius that better withstands cutting edge loads.

▲
Application limitation

Grade H6310 is not intended for steels hardened above 45 HRC — for hard turning, select the version CCMT with a cubic boron nitride (CBN) cutting edge.

Rhombic insert designation decoder according to ISO 1832

how to read the CCMT 09T304 code — positions 1–7 of the designation

Designation CCMT 09T304 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 704radius 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

704Corner radius

rε = 0.4 mm

code ÷ 10 → radius in mm

✓ 2 corners × 1 side = 2 cutting edges

Full designation: CCMT 09T304 = 80° diamond · positive 7° · class M · countersunk hole and chip breaker · IC 9.525 mm (l 9.7 mm) · s 3.97 mm · rε 0.4 mm

Compatible turning tools

holders with a size 09 diamond-shaped C 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 09T304 insert

use, turning tool selection, and turning parameters

Two — the 80° diamond has 2 corners for cutting, and the positive, single-sided geometry (7° clearance angle) allows only one side of the insert to be used. Once both corners are worn, replace the insert with a new one.

Holders with a size 09 C-shaped rhombic insert pocket and screw clamping (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.

Only in corner radius: 0.4 mm in 09T304 is used for finishing and precision turning at low feed rates, while 0.8 mm in 09T308 is a more versatile option that withstands higher feed rates. 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 rate, and continuous cooling, as austenitic steel conducts heat poorly and work-hardens when cutting too slowly.

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Carbide insert CCMT 09T304 H6310 Horn

Carbide insert CCMT 09T304 H6310 Horn

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