- 98% satisfied customers
- 72h delivery
- 30 dni na zwrot
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 |
| Nose radius re | 0.4 mm |
| ANSI code | CCMT 32.51 |

Cutting data for the CCMT 09T304 insert for steel and stainless steel
ISO groups P and M — finishing and semi-finishing
| Material | Finishing | Semi-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 |
Rhombic insert in H5115 carbide – applications and design
single-sided 80° rhombus, positive geometry, CVD coating for cast iron
The CCMT 09T304 turning insert is a single-sided, rhombic indexable insert with a 80° corner angle, made of grade H5115 cemented carbide. The positive geometry with a 7° clearance angle reduces cutting forces and promotes a smooth finish. The 80° rhombus has two working corners on one side, providing two cutting edges per insert. Grade H5115 with a CVD coating is designed primarily for turning and boring cast iron — gray, ductile, and malleable — and its application range also includes steel and stainless steel.
Key advantages of the H5115 cemented carbide insert
- Two cutting edges — two 80° corners on one side of the insert reduce the cost of finishing operations.
- Grade H5115 with CVD coating — carbide for turning cast iron (ISO group K), resistant to wear at high cutting speeds.
- Corner radius rε 0.4 mm — precision machining and finishing with low surface roughness.
- Positive geometry with a 7° clearance angle reduces cutting forces on slender and thin-walled workpieces.
- The countersunk hole and central screw provide rigid, repeatable clamping in the tool holder pocket.
- Dimensions conform to ISO 1832: edge length 9.7 mm, IC 9.525 mm (3/8″), thickness 3.97 mm — compatible with tool holders with a C-shaped diamond pocket.
Applications and cutting data selection for the diamond-shaped insert
The CCMT 09T304 insert (also written without spaces as ccmt09t304) is suitable for precision external turning and boring of cast iron bushings, pulleys, and housings. The CVD coating allows high cutting speeds of up to approximately 400 meters per minute. Calculate spindle speed using n = 1000·Vc/(π·D): for a workpiece diameter of 50 mm at Vc = 300 m/min, the result is approximately 1910 rpm. Dry machining is usually sufficient for gray cast iron, while coolant is recommended for ductile cast iron and steel. Indexable inserts in grade H5115 are supplied by the Korean brand Horn, which specializes in indexable turning tools.
The nose radius rε of 0.4 mm makes this insert suitable for precision machining — small radii reduce radial forces and allow low surface roughness. The countersunk hole allows the insert to be secured centrally in the tool holder pocket with a screw, while the single-sided chip breaker controls chip flow during continuous turning. When machining stainless steel, maintain a constant feed and continuous coolant supply to limit work hardening of the layer being cut. Tolerance class M ensures repeatable cutting edge positioning after indexing the insert in its pocket, reducing dimensional adjustments during production runs. The 80° diamond shape is also more rigid than narrower shapes, making it well suited to longitudinal turning and facing.
Corner radius rε 0.4 mm and single-sided positive geometry make the insert suitable for precision turning and finishing at small and medium depths of cut. For roughing with a large machining allowance, select from the family CCMT 09T3 a version with a larger nose radius.
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
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
Compatible turning tools
tool holders with a C-shaped diamond pocket (IC 9.525 mm) — external turning and boring
←L left-hand
→
←L left-hand
→
←L left-hand
→
←L left-hand
→
←L left-hand
→
←L left-hand
→
←L left-hand
→
←L left-hand
→
←L left-hand
→
←L left-hand
→
←L left-hand
→
←L left-hand
→
←L left-hand
→
←L left-hand
→
←L left-hand
→
←L left-hand
→
←L left-hand
→
←L left-hand
→
←L left-hand
→
←L left-hand
→
←L left-hand
→
←L left-hand
→
Frequently asked questions about the CCMT 09T304 insert
use, turning tool selection, and turning parameters
Two — a diamond with a 80° corner angle has 2 corners usable, while the positive, single-sided geometry (7° clearance angle) allows machining with one side of the insert. Once one corner is worn, simply index the insert in its pocket without changing the tool holder.
Tool holders with a C-shaped diamond pocket for size 09 (IC 9.525 mm): for external turning SCLCR/L, SCMCN and SCACR/L with shank cross sections of 12×12–25×25 mm; for hole boring, boring bars S12K–S32T with an SCLCR/L or SCFCR/L head. The complete list with diameter ranges is available in the compatible turning tools section above.
The difference is the nose radius within the CCMT 09T3 family. The value 0.4 mm is used for precision machining and finishing at low feeds; larger radii (e.g. 0.8 mm) are more versatile versions that withstand higher feeds. The other dimensions — IC 9.525 mm and thickness 3.97 mm — remain identical.
Yes — grade H5115 with a coating of CVD is designed for turning and boring gray, ductile, and malleable cast iron (ISO group K). The CVD coating withstands high cutting speeds, up to approximately 400 m/min, and the insert is also suitable for steel and stainless steel.
Product accessories
Carbide insert CCMT 09T308 H6310 Horn
Reference: 0000003710 In stock > 10 items
€4.69 brutto
Reviews
No customer reviews for the moment.
Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
Recommended for you
Użyj strzałek, aby zmieniać zdjęcia. Powiększaj przyciskami albo gestem szczypania. Zamknij galerię klawiszem Escape.
This website uses its own and third-party cookies to improve our services and show you advertising related to your preferences by analyzing your browsing habits. To give your consent to its use, press the Accept button.