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Carbide insert SCGT 120408 AL K10 Horn
€6.47 tax inc.
Net price: €5.26
Description
SCGT 120408 turning insert – 90° indexable square
| Technical data | |
|---|---|
| Side length l | 12.7 mm |
| Insert thickness s | 4.76 mm |
| Hole diameter d1 | 5.5 mm |
| Corner radius rε | 0.8 mm |
| ANSI code | SCGT 432 |
Cutting data for the SCGT 120408 insert for aluminum and nonferrous metals
finishing, semi-finishing, and roughing — ISO N group
| Material | Finishing | Semi-finishing | Roughing | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Vc [m/min] | Feed f [mm/rev] | ap [mm] | Vc [m/min] | Feed f [mm/rev] | ap [mm] | Vc [m/min] | Feed f [mm/rev] | ap [mm] | |
| NAluminum and nonferrous materials | 375-2400 | 0.15 | 0.1 | 40-240 | 0.3 | 2.55 | 40-240 | 0.5 | 5 |
K10 carbide indexable insert – applications and design
single-sided 90° square with a sharp edge for aluminum
The SCGT 120408 turning insert is a single-sided, square indexable insert made of fine-grained cemented carbide in grade K10, intended for turning aluminum and nonferrous metals. Shape S, a square with a 90° corner angle, provides four cutting edges and a rigid, strong corner that withstands loads. Positive geometry with a 7° clearance angle (letter C) reduces cutting forces and resistance when entering soft, sticky material. The sharp, often polished edge of grade K10 reduces built-up edge formation when machining aluminum alloys.
Key benefits of the K10 carbide insert
- Four cutting edges — the square has 4 corners that can be used in sequence by rotating the insert in the tool holder pocket.
- Grade K10 for ISO group N — fine-grained carbide for aluminum and nonferrous metals; a sharp edge instead of a thick coating.
- Positive geometry with a 7° angle — lower cutting forces and reduced power consumption when turning light metals.
- The rε 0.8 mm corner radius is a general-purpose option — it combines a smooth surface finish with edge strength.
- The countersunk hole for the clamping screw allows secure mounting of the insert in a holder for single-sided inserts.
- Tolerance class G, indicating a ground insert, ensures repeatable edge positioning after rotation in the pocket.
Square insert applications and cutting data selection
The SCGT 120408 insert (also written without a space as scgt120408) is suitable for longitudinal turning and facing of bushings, discs, and housings made of aluminum alloys, brass, and copper. Positive geometry with a sharp edge allows the high cutting speeds typical of light metals. Calculate spindle speed using n = 1000·Vc/(π·D): for a shaft with a diameter of 50 mm at Vc = 500 m/min, the result is approximately 3183 rpm. In precision aluminum machining, cutting speeds can reach 2400 m/min, so always limit spindle speed to the permissible value for the spindle and workholding setup.
For precision machining, use low feeds of approximately 0.15 mm/rev and a depth of cut of around 0.1 mm to obtain a smooth, burr-free surface. For roughing operations, you can increase the feed to 0.5 mm/rev and the depth of cut to 5 mm while maintaining a generous coolant supply and unobstructed chip evacuation. Thin, long aluminum chips are best broken with a positive feed and a continuous coolant stream to prevent them from wrapping around the workpiece. Grade K10 indexable inserts are supplied by the Korean brand Horn, known in our store for turning tooling.
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Application limitation
Grade K10 is an uncoated, fine-grained carbide for nonferrous metals — do not use it for steel or stainless steel, where the cutting edge wears very quickly. For high-silicon AlSi alloys (Si above 12 percent), consider a polycrystalline diamond cutting edge PCD.
Square insert designation decoder according to ISO 1832
how to read the SCGT 120408 code — positions 1–7 of the designation
Designation SCGT 120408 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.
Frequently asked questions about the SCGT 120408 insert
number of cutting edges, materials, and turning parameters
Four — a square has 4 corners, and the insert is single-sided (positive geometry with a 7° clearance angle). Once a corner becomes dull, rotate the insert in the tool holder pocket until all four edges have been used.
Grade K10 is a fine-grained, uncoated carbide for group ISO N, meaning aluminum and nonferrous metals. The sharp, often polished edge reduces built-up edge formation and produces a smooth surface. This grade is not suitable for steel or stainless steel.
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 roughing at higher feed rates. The remaining dimensions (IC 12.7 mm, thickness 4.76 mm) are identical.
The 7° clearance angle (letter C) reduces cutting forces and friction on the flank face. When turning soft, sticky aluminum, this reduces built-up edge formation and allows operation at high cutting speeds up to 2400 m/min.
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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 |
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