- 98% satisfied customers
- 72h delivery
- 30 dni na zwrot
Description
SCMT 120408 turning insert – indexable 90° 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 | SCMT 432 |
Cutting data for the SCMT 120408 insert for steel and stainless steel
finishing, semi-finishing and roughing — ISO P and M groups
| 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] | |
| PSteel | 130-200 | 0.05-0.15 | 0.1-1 | 130-200 | 0.12-0.21 | 0.5-3 | 170-190 | 0.12-0.21 | 0.5-3 |
| MStainless steel | 70-100 | 0.05-0.15 | 0.1-1 | 70-100 | 0.12-0.21 | 0.5-3 | 55-75 | 0.12-0.21 | 0.5-3 |
Grade H6310 cemented carbide indexable insert – applications and construction
single-sided 90° square with positive rake and a chip breaker
The SCMT 120408 turning insert is a single-sided, square indexable insert made of H6310 grade cemented carbide, designed for turning steel and stainless steel. Shape S, a square with a 90° corner angle, provides a rigid, strong edge for longitudinal turning, facing, and light profiling. Positive geometry with a 7° clearance angle reduces cutting forces and works well on slender workpieces and with thin uncut chips. Four corners on one side of the insert provide four cutting edges. The rε 0.8 mm nose radius combines surface finish with edge strength at feed rates of 0.12–0.21 mm/rev. The countersunk hole and single-sided chip breaker (type T per ISO 1832) control chip flow and breaking.
Key advantages of the H6310 cemented carbide insert
- Four cutting edges — 4 corners on one side of the square insert reduce the cost per cutting edge in production turning.
- Grade H6310 for ISO groups P and M — PVD-coated carbide: steel (P20-P40) and stainless steel (M20-M40), occasionally also cast iron.
- Positive rake with a 7° clearance angle — lower cutting forces and less vibration on slender shafts than with negative inserts.
- The rε 0.8 mm nose radius is a versatile option between finishing and medium machining.
- The 90° corner angle provides a rigid, strong edge for longitudinal turning and facing.
- Dimensions conform to ISO 1832: IC 12.7 mm (1/2″), thickness 4.76 mm — compatible with holders with a size 12 pocket.
Square insert applications and cutting data selection
The SCMT 120408 insert (also written without spaces as scmt120408) is suitable for turning 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 = 150 m/min, the result is approximately 1194 rpm. Positive rake and a countersunk mounting hole facilitate stable insert seating and reliable chip breaking at small and medium uncut chip cross sections. H6310 grade indexable inserts are supplied by the Korean brand Horn.
The PVD-coated H6310 grade covers ISO groups P20-P40 and M20-M40, allowing one insert to handle most tasks on a shop lathe: from structural steels through alloy steels to austenitic stainless steels. When turning steel, maintain a cutting speed of 130–200 m/min; for stainless steels, reduce it to 70–100 m/min and use a constant feed with flood coolant to limit work hardening and extend edge life. The insert can also handle gray cast iron occasionally. Select the rε nose radius to suit the operation: smaller for finishing, larger for roughing.
▲
Application limitation
Grade H6310 is not intended for steels hardened above 45 HRC — for hard turning, choose a cubic boron nitride insert CBN. Also remember that the single-sided, positive insert SCMT provides four cutting edges and less capacity for heavy roughing than double-sided inserts.
Square insert designation decoder according to ISO 1832
how to read the SCMT 120408 code — positions 1–7 of the designation
Designation SCMT 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.
Compatible turning tools
tool holders with a size 12 square pocket — external turning of steel and stainless steel
SSDCN 1616 H1216×16 × 100 mmNeutral
↔
↔
SSDCN 2020 K1220×20 × 125 mmNeutral
↔
↔
SSDCN 2525 M1225×25 × 150 mmNeutral
↔
↔
SSSCR/L 1616 H1216×16 × 100 mmR right-hand
←L left-hand
→
←L left-hand
→
SSSCR/L 2020 K1220×20 × 125 mmR right-hand
←L left-hand
→
←L left-hand
→
SSSCR/L 2525 M1225×25 × 150 mmR right-hand
←L left-hand
→
←L left-hand
→
Frequently asked questions about the SCMT 120408 insert
number of edges, turning tool selection, and turning parameters
Four — a square has 4 corners, and the positive, single-sided geometry (7° clearance angle) uses only the top side of the insert. When a corner becomes dull, simply rotate the insert by 90° in its pocket without changing the holder.
Holders with a square 12 pocket (IC 12.7 mm): for external turning, neutral SSDCN and right-hand and left-hand SSSCR/L with a 45° entering angle, in cross sections from 16×16 to 25×25 mm. The full list is available in the compatible turning tools section above.
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.
Yes — grade H6310 covers group ISO M20-M40. Maintain a cutting speed of 70–100 m/min, a constant feed, and continuous emulsion cooling: austenitic steel conducts heat poorly and work-hardens when cutting is too slow.
Product accessories
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
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.
Cookie preferences
Functional cookiesTechnical
Functional cookies are strictly necessary to provide the services of the shop, as well as for its proper functioning, so it is not possible to refuse their use. They allow the user to browse through our website and use the different options or services that exist on it.
Advertising Cookies
These are cookies that collect information about the advertisements shown to users of the website. They can be anonymous, if they only collect information about the advertising spaces shown without identifying the user, or personalised, if they collect personal information about the user of the shop by a third party, for the personalisation of these advertising spaces.
Analytics cookies
Collect information about the user's browsing experience in the shop, usually anonymously, although sometimes they also allow the user to be uniquely and unequivocally identified in order to obtain reports on the user's interests in the products or services offered by the shop.