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Carbide insert CCMT 060204 H6310 Horn - Carbide insert lathe - nr. 1
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  • Carbide insert CCMT 060204 H6310 Horn - Carbide insert lathe - nr. 1
  • Carbide insert CCMT 060204 H6310 Horn - Carbide insert lathe - nr. 2
Horn

Carbide insert CCMT 060204 H6310 Horn

Horn Horn
0000005754
Cutting edge length: 063 sizes of this insert
060912
€3.88 tax inc.

Net price: €3.16

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

Description

CCMT 060204 turning insert – single-sided 80° rhombus

Technical data
Side length l 6.35 mm
Insert thickness s 2.38 mm
Hole diameter d1 2.8 mm
Corner radius rε 0.4 mm
ANSI code CCMT 21.51
CCMT 060204 indexable turning insert made of H6310 cemented carbide, single-sided 80° diamond with a hole and chip breaker

Cutting data for the CCMT 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 190-240 0.05-0.2 0.1-1.65 130-200 0.07-0.14 0.5-2.25
MStainless steel 130-160 0.05-0.2 0.1-1.65 70-100 0.07-0.14 0.5-2.25

Positive H6310 cemented carbide insert – applications and design

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

The CCMT 060204 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 corner for longitudinal turning with the ability to face and lightly profile contours. The positive geometry with a 7° clearance angle reduces cutting forces, making the insert suitable for slender workpieces and boring small holes. Two corners on one side provide two cutting edges, while the corner radius rε of 0.4 mm makes the insert suitable for finishing and semi-finishing.

Key advantages of the H6310 cemented carbide insert

  • Positive geometry α 7° — low cutting forces reduce deflection of thin-walled bushings and long shafts, as well as vibration in unstable setups.
  • Grade H6310 for ISO groups P and M — PVD-coated carbide for steel (P20-P40) and stainless steel (M20-M40), and occasionally for cast iron.
  • Corner radius rε 0.4 mm — a smaller radius for precision turning and achieving a smooth surface at low feed rates.
  • Size 06 and an inscribed circle IC of 6.35 mm (1/4″) fit small holders and boring bars with shank diameters starting at 6 mm.
  • Screw clamping through the hole ensures secure seating in the pocket and quick replacement of a dull cutting edge.
  • The 80° corner angle provides greater strength than a 55° or 35° rhombus while maintaining contour access.

The positive CCMT geometry with a smooth rake face promotes favorable chip formation at shallow depths of cut. Low cutting forces reduce deflection of thin-walled workpieces, where negative inserts would cause vibration and impair surface quality. The insert is compatible with holders that use screw clamping through the hole, ensuring secure seating in the pocket and quick cutting edge replacement. For internal turning, the same inserts are mounted in boring bars with shank diameters from 6 to 12 mm, allowing access to relatively small holes. The thin chip formed by the positive geometry is easier to evacuate from the confined space of the bore, reducing the risk of scratching the machined surface.

Applications and cutting data selection for the diamond-shaped insert

The CCMT 060204 insert (also written without a space as CCMT060204) is suitable for turning shafts, pins, and bushings made of structural steels, as well as stainless steel components, including small-diameter boring. Calculate spindle speed using n = 1000·Vc/(π·D): for a shaft diameter of 20 mm at Vc = 200 m/min, the result is approximately 3183 rpm. For stainless steels, limit the cutting speed to 70–160 m/min and maintain a constant feed to prevent work hardening of the layer being cut. Indexable inserts in grade H6310 are supplied by the Korean brand Horn.

▲
Application limitation

The thin positive CCMT 06 insert is not intended for heavy roughing or interrupted cuts with a large chip cross section — choose a thicker negative insert for these tasks. Grade H6310 does not cover hardened steels above 45 HRC — for hard turning, choose a version with an edge CBN.

Rhombic insert designation decoder according to ISO 1832

how to read the CCMT 060204 code — designation positions 1–7

Designation CCMT 060204 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 – 506size 602thickness 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]

506Size

l = 6.35 mm

IC = 6.35 mm · 1/4″

602Thickness

s = 2.38 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 060204 = 80° diamond · positive 7° · class M · countersunk hole and chip breaker · IC 6.35 mm (l 6.35 mm) · s 2.38 mm · rε 0.4 mm

Compatible turning tools

holders with a 06 diamond-shaped pocket — external and internal turning

SCLCR/L 0808 E068×8 × 70 mmR right-hand
←L left-hand
→
SCLCR/L 1010 E0610×10 × 70 mmR right-hand
←L left-hand
→
SCLCR/L 1212 F0612×12 × 80 mmR right-hand
←L left-hand
→
SCMCN 0808 E068×8 × 70 mmR right-hand
←L left-hand
→
SCMCN 1010 E0610×10 × 70 mmR right-hand
←L left-hand
→
SCACR/L 0808 E068×8 × 70 mmR right-hand
←L left-hand
→
SCACR/L 1010 E0610×10 × 70 mmR right-hand
←L left-hand
→
S0608H SCLCR/L-06Ø6 | Ømin 8 mm | L=100R right-hand
←L left-hand
→
S08H SCLCR/L-06Ø8 | Ømin 11 mm | L=100R right-hand
←L left-hand
→
S10K SCLCR/L-06Ø10 | Ømin 13 mm | L=125R right-hand
←L left-hand
→
S10x16P SCLCR/L-06Ø16 | Ømin 13 mm | L=150R right-hand
←L left-hand
→
S12K SCLCR/L-06Ø12 | Ømin 16 mm | L=125R right-hand
←L left-hand
→
S12x16P SCLCR/L-06Ø16 | Ømin 13 mm | L=150R right-hand
←L left-hand
→
S08H SCFCR/L-06Ø8 | Ømin 11 mm | L=100R right-hand
←L left-hand
→
S10K SCFCR/L-06Ø10 | Ømin 13 mm | L=125R right-hand
←L left-hand
→
S12K SCFCR/L-06Ø12 | Ømin 16 mm | L=125R right-hand
←L left-hand
→

Frequently asked questions about the CCMT 060204 insert

use, turning tool selection, and turning parameters

Two — the 80° diamond has 2 corners suitable for turning, while the positive, single-sided design (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; loosen the clamping screw and fit the next insert in the same pocket.

Tool holders with a 06 rhombic pocket and screw clamping through the hole: for external turning SCLCR/L and SCACR/L (entering angle 90°) and SCMCN (45°) with shank cross sections of 8×8–12×12 mm; for internal turning, boring bars S06–S12 with an SCLCR/L or SCFCR/L head, suitable for holes starting at Ø8 mm.

Only in corner radius: 0.2 mm is used for finishing and thin chips at low feeds, 0.4 mm is a precision/general-purpose version, while 0.8 mm provides a stronger corner at higher feeds. The remaining dimensions (IC 6.35 mm, thickness 2.38 mm) are identical, so all versions fit the same tool holder.

Yes — grade H6310 covers group ISO M20-M40. Maintain a cutting speed of 70–160 m/min, a constant feed, and continuous emulsion cooling: austenitic steel dissipates heat poorly and work-hardens when cutting is too slow, accelerating edge wear.

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Carbide insert CCMT 060204 H6310 Horn

Carbide insert CCMT 060204 H6310 Horn

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