SUMITOMO VCMT110304N-SU AC630M Turning Insert (Metric VCMT110304N-SU / Inch VCMT221-SU)
SUMITOMO VCMT110302N-SU AC630M Turning Insert (Metric VCMT110302N-SU / Inch VCMT220.5-SU)
SUMITOMO VCGT110302R-FY AC520U Turning Insert (Metric VCGT110302R-FY / Inch VCGT220.5R-FY)
SUMITOMO VBMT160404N-SU AC820P Carbide Turning Insert | Metric VBMT 160404 N-SU / Inch VBMT 331-SU
Sumitomo VB / VC 35° Diamond Positive Inserts
Sumitomo 35° diamond positive inserts with 7° positive rake provide the narrowest point angle of any standard turning geometry. The narrow 35° point delivers maximum clearance for profiling, contour turning, and small-diameter work — making VB/VC the preferred choice for Swiss-type lathes and aluminum finishing.
This catalog covers 4 Sumitomo VB/VC 35° diamond positive inserts across VCMT (molded chipbreaker, 2 SKUs), VCGT (ground sharp, 1 SKU), and VBMT (molded, 1 SKU) geometries. Available in IC 11 / 16.5 mm sizes with PVD (AC630M, AC820P) and CVD (AC520U) grades.
Browse the full vb-vc-35-diamond Sumitomo catalog, or jump to: About · Featured SKUs · All Categories · Grades · FAQ.
Sumitomo-Original Inserts from Japan
All 4 inserts in this catalog are 100% genuine Sumitomo — manufactured by Sumitomo Electric Industries in Itami, Japan. Each insert is sourced through Sumitomo's authorized distribution channels and ships in original Sumitomo factory packaging with full Sumitomo grade and lot traceability. Sumitomo's premium carbide substrates, CVD/PVD coatings, and edge-preparation processes are specified across the full AC / NC / GC / KW / A-series grade families — providing the consistent performance and reliability that has made Sumitomo a leading Japanese cutting-tool brand.
About VB / VC 35° Diamond Positive Inserts
Sumitomo 35° diamond positive inserts with 7° positive rake provide the narrowest point angle of any standard turning geometry. The narrow 35° point delivers maximum clearance for profiling, contour turning, and small-diameter work — making VB/VC the preferred choice for Swiss-type lathes and aluminum finishing.
The VB-VC-35-DIAMOND family includes sub-designations:
- VCMT — 35° Diamond Positive w/ Hole + Molded Chipbreaker
- VCGT — 35° Diamond Positive Ground Sharp Edge
- VBMT — 35° Diamond Positive w/ Hole + Molded Chipbreaker
Sumitomo Electric Industries (Itami, Japan) is one of the world's leading manufacturers of CNC cutting tools, with over 100 years of carbide expertise. The Sumitomo AC series (CVD/PVD-coated steel), NC series (cermet + stainless), GC series (aluminum + cast iron), and A-series (ceramic) represent decades of grade development.
Featured Sumitomo VB-VC-35-DIAMOND Inserts
Twelve representative selections from our 4-SKU Sumitomo VB-VC-35-DIAMOND catalog:
SUMITOMO VCMT110304N-SU AC630M Turning Insert (Metric VCMT110304N-SU / Inch VCMT221-SU)
Standard Sumitomo VB-VC-35-DIAMOND insert for general turning.
SUMITOMO VCGT110302R-FY AC520U Turning Insert (Metric VCGT110302R-FY / Inch VCGT220.5R-FY)
Standard Sumitomo VB-VC-35-DIAMOND insert for general turning.
SUMITOMO VBMT160404N-SU AC820P Carbide Turning Insert | Metric VBMT 160404 N-SU / Inch VBMT 331-SU
Standard Sumitomo VB-VC-35-DIAMOND insert for general turning.
SUMITOMO VCMT110302N-SU AC630M Turning Insert (Metric VCMT110302N-SU / Inch VCMT220.5-SU)
Standard Sumitomo VB-VC-35-DIAMOND insert for general turning.
View All 4 Sumitomo VB-VC-35-DIAMOND Inserts →
All Categories — Organized by Sub-Designation & IC Size
This catalog spans 3 sub-designations with 4 total SKUs. Each sub-designation is engineered for a specific application range:
VCMT — 35° Diamond Positive w/ Hole + Molded Chipbreaker (2 SKUs)
Standard molded chipbreaker for general profiling and turning.
- IC 11 mm — 2 SKUs with grades AC630M
VCGT — 35° Diamond Positive Ground Sharp Edge (1 SKU)
Ground sharp edge for finishing aluminum + small-diameter work.
- IC 11 mm — 1 SKU with grades AC520U
VBMT — 35° Diamond Positive w/ Hole + Molded Chipbreaker (1 SKU)
General profiling workhorse. Molded chipbreaker for tight profiling.
- IC 15.875 mm — 1 SKU with grades AC820P
Sumitomo Grade Family Reference
3 grade families cover the full ISO application range:
| Sumitomo Grade | Type | ISO | Best For |
|---|---|---|---|
| AC630M | PVD | P15-P30 / M15-M30 | Stainless premium |
| AC520U | CVD | P15-P35 | Steel high-speed |
| AC820P | PVD | P10-P30 / M10-M30 | Steel + stainless |
How to Choose the Right Sumitomo VB-VC-35-DIAMOND Insert
Selecting the correct Sumitomo VB-VC-35-DIAMOND insert involves three decisions:
- Material → Grade: Steel → AC6020M / AC6030M. Stainless → NC5330 / NC5340. Cast iron → NC40 series. Aluminum → GC3040 / KW10.
- Sub-designation → Operation: General turning → VCMT. Finishing → VCGT. Heavy roughing → thicker section.
- IC size → Tool holder: Smaller IC fits compact holders. Larger IC for heavy-duty work.
Tip: For stainless steel work, Sumitomo NC5330 / NC5340 (CVD M-grade) provide superior wear resistance. For aluminum, use uncoated GC3040 or KW10 with sharp-edge geometry.
Frequently Asked Questions
Are these genuine Sumitomo original inserts?
Yes — all 4 products in this catalog are 100% genuine Sumitomo originals manufactured by Sumitomo Electric Industries in Itami, Japan. Each insert ships in original Sumitomo factory packaging with full traceability.
What is the difference between the VB-VC-35-DIAMOND sub-designations?
The VB-VC-35-DIAMOND family includes sub-designations like VCMT, VCGT, VBMT. Each sub-designation has a specific tolerance class, edge preparation, and intended use. M-class (middle) is the workhorse for general turning; G-class (ground) is precision-sharp for finishing; the heavier variants are for roughing.
What grade should I choose for stainless steel?
For stainless steel work, Sumitomo recommends NC5330 (CVD M-grade) for general work and NC2020 (cermet) for finishing. NC5340 is the premium choice for heavy roughing on tough stainless.
What tool holder do I need for VB-VC-35-DIAMOND inserts?
Sumitomo VB-VC-35-DIAMOND positive-rake (7° positive rake) inserts fit standard tool holders. Browse our turning tool holder catalog for compatible options.
How does Sumitomo compare to Sandvik / Kyocera?
Sumitomo's AC-series PVD/CVD-coated inserts are direct competitors to Sandvik GC4325 and Kyocera PR1535 in steel. The NC-series cermet and CVD grades match Kyocera TN60 and Sandvik GC1525. Sumitomo's GC-series aluminum grades are highly regarded for non-ferrous work.
Need Help Selecting the Right Sumitomo VB-VC-35-DIAMOND Insert?
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Sumitomo Master Catalog
Full Sumitomo carbide insert lineup across all geometries and grades.
Sumitomo VB-VC-35-DIAMOND — Current
This collection with all 4 SKUs.
Sumitomo, AC, NC, GC, KW, A-series are trademarks and grade designations of Sumitomo Electric Industries, Ltd. (Itami, Japan). Distributed by cnchome-beyond.com — Super Industrial Trading Co., Ltd, Hangzhou, China.