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Description
VCMT 110308 turning insert – diamond with a 35° corner angle
| Technical data | |
|---|---|
| Side length l | 11 mm |
| Insert thickness t | 3.18 mm |
| Hole diameter d1 | 2.8 mm |
| Nose radius re | 0.8 mm |
| ANSI code | VCMT 222 |
Cutting data for the VCMT 110308 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 | 250-350 | 0.1 | 0.1 | 180-270 | 0.15 | 0.3 | 170-220 | 0.25 | 1.5 |
| MStainless steel | 125-260 | 0.1 | 0.1 | 100-220 | 0.15 | 0.3 | 80-200 | 0.25 | 1.5 |
Diamond-shaped H6310 cemented carbide insert – applications and design
single-sided 35° diamond with positive geometry and a chip breaker
The VCMT 110308 turning insert is a single-sided, diamond-shaped indexable insert made of grade H6310 cemented carbide, designed for turning steel and stainless steel. The V shape, a diamond with an acute 35° corner angle, facilitates copy turning, profiling, and machining along complex workpiece contours. Positive geometry with a 7° clearance angle reduces cutting forces and performs well on slender and thin-walled components. The diamond shape provides two cutting edges on one working side of the insert, while the countersunk hole ensures secure screw clamping.
The insert is made of fine-grain cemented carbide with a PVD coating, which improves edge resistance to wear and elevated operating temperatures. Tolerance class M ensures repeatable corner positioning after rotating the insert in its pocket and after replacing it with a new one. The single-sided chip breaker forms and breaks chips even at low feeds, facilitating turning on automatic lathes and turning centers. The hole with a 40–60° countersink allows the insert to be secured with a countersunk screw without an additional clamping lever. This design combines precise surface finishing with quick, simple handling when changing a worn cutting edge in the pocket.
Key advantages of the H6310 cemented carbide insert
- Two cutting edges — two acute 35° corners on one side of the insert provide precise finishing and profiling with repeatable cutting edge positioning.
- 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.
- Acute 35° corner angle — allows access to undercuts, grooves, and smooth radius transitions inaccessible to inserts with 80° or 90° corners.
- Positive geometry with a 7° clearance angle reduces cutting resistance and heat generation, limiting vibration during copy turning.
- The rε 0.8 mm nose radius combines a good surface finish with edge strength at feeds of 0.15–0.25 mm/rev.
- The countersunk hole (type T according to ISO 1832) and single-sided chip breaker ensure stable seating in the pocket and controlled chip flow.
Applications and cutting data selection for the diamond-shaped insert
The VCMT 110308 insert (also written without a space as vcmt110308) performs well in finish and medium turning of shafts, bushings, and profiled components made of structural steels and stainless steel. Calculate spindle speed using n = 1000·Vc/(π·D): for a shaft diameter of 40 mm at Vc = 250 m/min, the result is approximately 1989 rpm. For stainless steels, maintain a cutting speed of 80–260 m/min and a constant feed to prevent work hardening of the layer being cut. When finishing, reduce the feed to 0.1 mm/rev and increase the cutting speed to improve the surface finish. These turning tool inserts are supplied by the Korean brand Horn.
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Application limitation
The acute corner angle 35° produces slender, fragile tips — the VCMT 110308 insert is designed for precision machining and profiling, not for heavy roughing or heavily interrupted cutting. For large machining allowances and impact loads, select an insert with a corner angle of 80° or 90°.
Rhombic insert designation decoder according to ISO 1832
how to read the VCMT 110308 code — designation positions 1–7
Designation VCMT 110308 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
holders with a 11 diamond pocket — external turning and boring
SVJCR/L 1616 H1116×16 × 100 mmR right-hand
←L left-hand
→
←L left-hand
→
SVJCR/L 2020 K1120×20 × 125 mmR right-hand
←L left-hand
→
←L left-hand
→
SVHCR/L 1616 H1116×16 × 100 mmR right-hand
←L left-hand
→
←L left-hand
→
SVHCR/L 2020 K1120×20 × 125 mmR right-hand
←L left-hand
→
←L left-hand
→
SVVCN 1616 H1116×16 × 100 mmNeutral
↔
↔
SVVCN 2020 K1120×20 × 125 mmNeutral
↔
↔
S16P SVUCR/L-11Ø16 × 170 mmR right-hand
←L left-hand
→
←L left-hand
→
S20R SVUCR/L-11Ø20 × 200 mmR right-hand
←L left-hand
→
←L left-hand
→
S16P SVQCR/L-11Ø16 × 170 mmR right-hand
←L left-hand
→
←L left-hand
→
S20R SVQCR/L-11Ø20 × 200 mmR right-hand
←L left-hand
→
←L left-hand
→
Frequently asked questions about the VCMT 110308 insert
use, turning tool selection, and turning parameters
Two — the 35° diamond has 2 acute corners, while the positive, single-sided geometry (7° clearance angle) allows only one side of the insert to be used. Once one corner becomes dull, rotate the insert in its pocket to the other cutting edge without changing the holder.
Holders with a 11 diamond-shaped pocket (IC 6.35 mm): for external turning SVJCR/L (entering angle 93°), SVHCR/L (107.5°) and neutral SVVCN (72.5°) in cross sections of 16×16 and 20×20 mm; for boring, boring bars S16P and S20R with an SVUCR/L or SVQCR/L head.
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 higher feeds and larger machining allowances. The remaining dimensions (IC 6.35 mm, thickness 3.18 mm) are identical throughout the VCMT 1103 family.
Yes — grade H6310 covers group ISO M20-M40. Maintain a cutting speed of 80–260 m/min, a constant feed, and continuous emulsion cooling: austenitic steel conducts heat poorly and work-hardens when cutting is too slow.
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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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