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Carbide insert SCMT 09T304 H6310 Horn
€6.15 tax inc.
Net price: €5.00
Description
SCMT 09T304 turning insert – indexable 90° square
| Technical data | |
|---|---|
| Side length l | 9.53 mm |
| Insert thickness s | 3.97 mm |
| Hole diameter d1 | 4.4 mm |
| Corner radius rε | 0.4 mm |
| ANSI code | SCMT 32.51 |
Cutting data for the SCMT 09T304 insert for steel and stainless steel
finishing and semi-finishing — ISO groups P and M
| 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 |
Grade H6310 cemented carbide indexable insert – applications and construction
single-sided 90° square with a hole and chip breaker
The SCMT 09T304 turning insert is a single-sided, square indexable insert made of grade H6310 cemented carbide, designed for turning steel and stainless steel. The S shape, a square with a 90° corner angle, provides a strong cutting edge that withstands loads during longitudinal turning and facing. Positive geometry with a 7° clearance angle reduces cutting forces and is suitable for precision machining and slender workpieces. The insert cuts on one side and provides four cutting edges — one per corner. A countersunk hole allows a screw to secure it centrally in the pocket, while the single-sided chip breaker controls chip flow and breaking during precision machining.
Key advantages of the H6310 cemented carbide insert
- Four cutting edges — 4 corners on one side of the insert reduce the cost per cutting edge compared with inserts having fewer corners.
- Grade H6310 for ISO groups P and M — general-purpose PVD-coated carbide: steel (P20-P40) and stainless steel (M20-M40), and occasionally cast iron.
- Positive 7° geometry — lower cutting forces, a smoother surface, and less vibration when machining thin or flexible workpieces.
- The nose radius rε of 0.4 mm favors finishing at low feeds and achieving low surface roughness.
- The countersunk hole allows the insert to be secured centrally in the tool holder pocket with a screw, without a clamp.
- Dimensions according to ISO 1832: IC 9.525 mm (3/8″), side length 9.53 mm, thickness 3.97 mm — fit tool holders with a size 09 square pocket.
Square insert applications and cutting data selection
The SCMT 09T304 insert (also written without a space as scmt09t304) is suitable for precision turning 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 with a diameter of 40 mm at Vc = 250 m/min, the result is approximately 1989 rpm. When machining stainless steels, maintain a cutting speed of 90–150 m/min and a constant feed to reduce work hardening of the layer being cut. Indexable inserts in grade H6310 are supplied by the Korean brand Horn. The PVD coating increases cutting edge wear resistance and allows operation at higher speeds without rapid corner wear. For structural steels, start with a cutting speed in the range of 180–300 m/min and a feed of 0.05–0.2 mm/rev, and select the depth of cut to suit the rigidity of the workpiece and clamping. Continuous cooling removes heat from the cutting zone and extends cutting edge life. The nose radius determines the application: rε 0.4 mm is the finishing version for low feeds, while larger radii in the same SCMT 09T3 family withstand higher feeds and rough turning better.
▲
Application limitation
Grade H6310 is not intended for steels hardened above 45 HRC — for hard turning, choose an insert made of CBN. The small nose radius rε 0.4 mm also limits feed and depth of cut during roughing.
Square insert designation decoder according to ISO 1832
how to read the SCMT 09T304 code — positions 1–7 of the designation
Designation SCMT 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.
Compatible turning tools
tool holders with a size 09 square pocket — external turning of steel and stainless steel
SSDCN 1212 F0912×12 × 80 mmNeutral
↔
↔
SSDCN 1616 H0916×16 × 100 mmNeutral
↔
↔
SSDCN 2020 K0920×20 × 125 mmNeutral
↔
↔
SSDCN 2525 M0925×25 × 150 mmNeutral
↔
↔
SSSCR/L 1212 F0912×12 × 80 mmR right-hand
←L left-hand
→
←L left-hand
→
SSSCR/L 1616 H0916×16 × 100 mmR right-hand
←L left-hand
→
←L left-hand
→
SSSCR/L 2020 K0920×20 × 125 mmR right-hand
←L left-hand
→
←L left-hand
→
SSSCR/L 2525 M0925×25 × 150 mmR right-hand
←L left-hand
→
←L left-hand
→
Frequently asked questions about the SCMT 09T304 insert
use, turning tool selection, and turning parameters
Four — a square has 4 corners, and the positive, single-sided geometry (7° clearance angle) makes them available on one side of the insert. When an edge becomes dull, simply rotate the insert in its pocket to the next corner, without changing the holder.
Holders with a square 09 pocket (IC 9.525 mm) for external turning: neutral SSDCN and right-hand and left-hand SSSCR/L in shank cross sections from 12×12 to 25×25 mm. The choice of a right-hand or left-hand version depends on the feed direction and workpiece geometry.
Mainly in the corner radius: rε 0.4 mm in SCMT 09T304 is a finishing option for low feed rates and low surface roughness, while the larger radii in the family SCMT 09T3 better withstand higher feed rates and rough turning. The other 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 cooling: austenitic steel dissipates heat poorly and work-hardens when cutting is too slow.
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| 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 |
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