DCMT11T308N-SU AC830P (10pcs) SUMITOMO
DCMT11T308N-SU AC820P (10pcs) SUMITOMO
DCMT11T308N-SU AC630M (10pcs) SUMITOMO
DCMT11T308N-SU AC530U (10pcs) SUMITOMO
DCMT11T304N-SU T2000Z (10pcs) SUMITOMO
DCMT11T304N-SU T1500Z (10pcs) SUMITOMO
DCMT11T304N-SU AC830P (10pcs) SUMITOMO
DCMT11T304N-SU AC820P (10pcs) SUMITOMO
DCMT11T304N-SU AC630M (10pcs) SUMITOMO
DCMT11T304N-SU AC6040M (10pcs) SUMITOMO
DCMT11T304N-SU AC530U (10pcs) SUMITOMO
DCMT11T304N-MU AC820P (10pcs) SUMITOMO
DCMT11T304N-MU AC630M (10pcs) SUMITOMO
DCMT11T302N-SU AC830P (10pcs) SUMITOMO
DCMT11T302N-SU AC630M (10pcs) SUMITOMO
DCMT11T302N-SU AC530U (10pcs) SUMITOMO
DCMT11T302N-LU AC6040M (10pcs) SUMITOMO
DCMT070208N-SU AC830P (10pcs) SUMITOMO
DCMT070208N-SU AC630M (10pcs) SUMITOMO
DCMT070204N-SU AC830P (10pcs) SUMITOMO
DCMT070204N-SU AC820P (10pcs) SUMITOMO
DCMT070204N-SU AC630M (10pcs) SUMITOMO
DCMT070204N-SU AC530U (10pcs) SUMITOMO
DCMT070202N-SU AC630M (10pcs) SUMITOMO
DCMT070202N-SU AC530U (10pcs) SUMITOMO
DCGT11T304MN-SC AC530U (10pcs) SUMITOMO
DCGT070204MN-SI AC520U (10pcs) SUMITOMO
DCGT070202MN-SI AC520U (10pcs) SUMITOMO
Sumitomo DC 55° Diamond Positive Inserts
Sumitomo 55° diamond positive inserts with 7° positive rake are the standard profiling and contour turning geometry. The 55° point provides better clearance than 80° (CC) for profiling and finishing work — making DC the preferred choice for small-diameter and contour operations.
This catalog covers 28 Sumitomo DC 55° diamond positive inserts across DCMT (molded chipbreaker, 25 SKUs) and DCGT (ground sharp edge, 3 SKUs) geometries. Available in IC 6.35 / 9.525 mm sizes with PVD (AC820P, AC830P, AC630M, AC530U, AC520U) and cermet (T1500Z, T2000Z) grades.
Browse the full dc-55-diamond Sumitomo catalog, or jump to: About · Featured SKUs · All Categories · Grades · FAQ.
Sumitomo-Original Inserts from Japan
All 28 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 DC 55° Diamond Positive Inserts
Sumitomo 55° diamond positive inserts with 7° positive rake are the standard profiling and contour turning geometry. The 55° point provides better clearance than 80° (CC) for profiling and finishing work — making DC the preferred choice for small-diameter and contour operations.
The DC-55-DIAMOND family includes sub-designations:
- DCMT — 55° Diamond Positive w/ Hole + Molded Chipbreaker
- DCGT — 55° Diamond Positive Ground Sharp Edge
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 DC-55-DIAMOND Inserts
Twelve representative selections from our 28-SKU Sumitomo DC-55-DIAMOND catalog:
DCMT11T308N-SU AC830P (10pcs) SUMITOMO
Standard Sumitomo DC-55-DIAMOND insert for general turning.
DCGT11T304MN-SC AC530U (10pcs) SUMITOMO
Standard Sumitomo DC-55-DIAMOND insert for general turning.
DCMT11T308N-SU AC820P (10pcs) SUMITOMO
Standard Sumitomo DC-55-DIAMOND insert for general turning.
DCMT11T308N-SU AC630M (10pcs) SUMITOMO
Standard Sumitomo DC-55-DIAMOND insert for general turning.
DCMT11T308N-SU AC530U (10pcs) SUMITOMO
Standard Sumitomo DC-55-DIAMOND insert for general turning.
DCMT11T304N-SU T2000Z (10pcs) SUMITOMO
Standard Sumitomo DC-55-DIAMOND insert for general turning.
DCMT11T304N-SU T1500Z (10pcs) SUMITOMO
Standard Sumitomo DC-55-DIAMOND insert for general turning.
DCMT11T304N-SU AC830P (10pcs) SUMITOMO
Standard Sumitomo DC-55-DIAMOND insert for general turning.
DCMT11T304N-SU AC820P (10pcs) SUMITOMO
Standard Sumitomo DC-55-DIAMOND insert for general turning.
DCMT11T304N-SU AC630M (10pcs) SUMITOMO
Standard Sumitomo DC-55-DIAMOND insert for general turning.
DCMT11T304N-SU AC6040M (10pcs) SUMITOMO
Standard Sumitomo DC-55-DIAMOND insert for general turning.
DCMT11T304N-SU AC530U (10pcs) SUMITOMO
Standard Sumitomo DC-55-DIAMOND insert for general turning.
View All 28 Sumitomo DC-55-DIAMOND Inserts →
All Categories — Organized by Sub-Designation & IC Size
This catalog spans 2 sub-designations with 28 total SKUs. Each sub-designation is engineered for a specific application range:
DCMT — 55° Diamond Positive w/ Hole + Molded Chipbreaker (25 SKUs)
Standard 55° diamond for profiling and contour turning.
- IC 11 mm — 15 SKUs with grades AC830P, AC820P, AC630M, AC530U, T2000Z, T1500Z
DCGT — 55° Diamond Positive Ground Sharp Edge (3 SKUs)
Ground precision insert for finishing profiling and contour turning.
- IC 11 mm — 1 SKU with grades AC530U
Sumitomo Grade Family Reference
7 grade families cover the full ISO application range:
| Sumitomo Grade | Type | ISO | Best For |
|---|---|---|---|
| AC630M | PVD | P15-P30 / M15-M30 | Stainless premium |
| AC530U | CVD | P15-P35 | Steel high-speed |
| AC830P | PVD | P10-P30 / M10-M30 | Steel + stainless |
| AC820P | PVD | P10-P30 / M10-M30 | Steel + stainless |
| AC520U | CVD | P15-P35 | Steel high-speed |
| T2000Z | Cermet | P05-P20 | Steel finishing premium |
| T1500Z | Cermet | P05-P20 | Steel finishing premium |
How to Choose the Right Sumitomo DC-55-DIAMOND Insert
Selecting the correct Sumitomo DC-55-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 → DCMT. Finishing → DCGT. 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 28 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 DC-55-DIAMOND sub-designations?
The DC-55-DIAMOND family includes sub-designations like DCMT, DCGT. 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 DC-55-DIAMOND inserts?
Sumitomo DC-55-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 DC-55-DIAMOND Insert?
Tell us your workpiece material, operation type, and cutting parameters — we'll recommend the correct Sumitomo grade within 24 hours.
Request a Quote WhatsApp a Specialist Download Grade Catalog Full Sumitomo Catalog
Related Sumitomo & Cross-Brand Catalogs
Sumitomo Master Catalog
Full Sumitomo carbide insert lineup across all geometries and grades.
Sumitomo DC-55-DIAMOND — Current
This collection with all 28 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.
