DC 55° Diamond Mitsubishi

About Mitsubishi DC/DP 55° Diamond Turning Inserts

Mitsubishi Materials (三菱マテリアル) 55° diamond rhombic positive turning inserts offer a tighter approach angle than the standard 80° (CCMT) geometry, making them ideal for profiling, finishing, and slender shaft workpieces where reduced radial force and sharper cutting edges are critical. The 55° geometry is dimensionally interchangeable with every major insert manufacturer (Sandvik DCMT, Kennametal DCMT, Iscar DCMT, Walter DCMT) — a global industry standard for profiling and semi-finishing. The dominant family in this catalog is DCMT (55° rhombic, with hole, positive 7° clearance) with 50+ SKUs across 3 IC sizes and 8 grade families. CNCHome-Beyond is an authorized Mitsubishi distributor; orders placed before 3 PM China time ship same-day from our Hangzhou warehouse with DHL/UPS/FedEx express delivery in 3-7 business days.

Why 55° Diamond vs 80° Diamond?

Mitsubishi Grade Family Reference (8 Grades for DC 55°)

For more details on Mitsubishi's grade naming convention (US/NX/VP/UE/UC/HTI/UTI/AP), see our Mitsubishi CC/CP 80° Diamond collection which has a complete grade decoder section.

Mitsubishi 55° Diamond Geometry at a Glance

Need to compare with other brand 55° diamond rhombic geometries? See our complete Insert Grade Cross-Reference Tool and SKU Cross-Reference for direct equivalents between Mitsubishi, Sandvik, Kennametal, Iscar, Walter, Tungaloy, Kyocera, KORLOY, and ZCC·CT.

Mitsubishi Chip-Breaker Reference (5 Variants for 55°)

55° diamond inserts use a similar chip-breaker naming convention to 80° but with some specialty variants for profiling:

How to Choose a Mitsubishi 55° Diamond Insert

Step 1: Match the geometry to the operation. For profiling, slender shafts, or finishing thin-walled workpieces, choose 55° DCMT. For general purpose turning on rigid workpieces, choose 80° CCMT instead. For mirror-finish precision turning, choose DCGT (cermet lapped). For specialty cermet edge prep, choose DCET.

Step 2: Match the grade to the workpiece material. Steel → UE6110 (workhorse) or NX2525 (cermet mirror finish). Stainless → US735 (CVD) or VP15TF (PVD Miracle Coat). Cast iron → UC5115 (universal). Aluminum → HTI10 (uncoated). High-temp alloys (Inconel, titanium) → VP15TF (PVD Al-rich).

Step 3: Match the chip-breaker to feed and depth of cut. Precision finishing (0.03-0.10 mm/rev) → FV. Semi-finishing (0.05-0.15) → SV. General purpose (0.08-0.18) → MV (most common). DCGT cermet profiling → SMG / SN.

Step 4: Match the insert to the tool holder. Mitsubishi DCMT fits industry-standard DCLNR/L (55° negative rake) and similar 55° positive tool holders. For profiling, use a 55° tool holder with reduced clearance for maximum edge support. CNCHome-Beyond carries compatible aftermarket holders at 30-50% below OEM — see our turning tool holder guide and Insert Holder Selector.

Compatible Tool Holders (Standard 55° Positive Rake)

Mitsubishi DCMT inserts fit the following CNCHome-Beyond tool holder families (all ISO 5610 standard, drop-in compatible with Mitsubishi OEM holders):

• Double-Clamp External Holders (DCLNR/L, PCLNR/L) — for heavy DCMT roughing
• Multi-Lock External Holders (MCLNR/L) — for general DCMT medium cutting
• Lever-Lock (P-Type) External Holders — for quick-change high-mix production
• Screw-Clamp Boring Bars (S...DCLNR/L, S...MCLNR/L) — for internal turning with positive inserts

Cross-Brand Equivalents to Mitsubishi 55° Diamond

Mitsubishi 55° diamond rhombic insert geometries are dimensionally interchangeable with other major brands. Direct equivalents:

Looking for a Sandvik or Kennametal equivalent at lower cost? See Sandvik master catalog or KORLOY positive turning for direct alternatives. Use our Insert Grade Cross-Reference Tool for grade-to-grade equivalents across 17+ brands.

Featured Bestsellers (16 SKUs across 3 geometry families)

Browse a representative selection from our 64-SKU catalog below, organized by geometry and grade. All featured inserts are in stock and ship same-day from Hangzhou. Click any part number to view detailed specs, grade composition, and recommended cutting parameters.

DCMT Series — 55° Rhombic with Hole (Featured: 10 SKUs)

The DCMT is Mitsubishi's main 55° diamond turning geometry. Three IC sizes (0702 / 11T3 / 1504) cover everything from small lathe work to standard medium turning. The 7° positive clearance reduces radial force for profiling slender workpieces.

• DCMT11T304 VP15TF - 9.5mm IC (0.4mm nose), no CB, PVD Miracle Coat universal (workhorse)
• DCMT11T308 VP15TF - 9.5mm IC (0.8mm nose), no CB, PVD Miracle Coat (most popular)
• DCMT11T304 US735 - 9.5mm IC, no CB, CVD stainless heavy
• DCMT11T304 UE6020 - 9.5mm IC, no CB, CVD steel finishing
• DCMT11T304 UE6110 - 9.5mm IC, no CB, CVD steel workhorse
• DCMT11T304 UC5115 - 9.5mm IC, no CB, CVD cast iron
• DCMT11T304 NX2525 - 9.5mm IC, no CB, cermet mirror finish
• DCMT11T304-FM VP15TF - 9.5mm IC, FM finishing, PVD universal
• DCMT070204 VP15TF - 6.35mm IC, no CB, PVD universal (small lathe)
• DCMT150404 UE6110 - 12.7mm IC, no CB, CVD steel (medium lathe)

DCGT Series — 55° Cermet Precision (Featured: 3 SKUs)

The DCGT is Mitsubishi's cermet-grade 55° insert with precision lapped/polished cutting edge. The "G" indicates cermet construction. Used for mirror-finish steel and precision profiling on small workpieces.

• DCGT11T302L-F VP15TF - 9.5mm IC, L-F precision left, PVD (mirror)
• DCGT11T304R-F VP15TF - 9.5mm IC, R-F precision right, PVD (mirror)
• DCGT070204L-F NX2525 - 6.35mm IC, L-F precision, cermet (mirror)

DCET Series — 55° Cermet Edge Prep (Featured: 3 SKUs)

The DCET is Mitsubishi's cermet edge-prepped 55° insert for light profiling and small diameter turning. The "E" indicates edge preparation for tougher cuts than standard DCGT.

• DCET11T304R-SN VP15TF - 9.5mm IC, R-SN edge, PVD (small diameter)
• DCET070202R-SN VP15TF - 6.35mm IC, R-SN, PVD (small lathe)
• DCET070202L-SN VP15TF - 6.35mm IC, L-SN, PVD (small lathe)

Frequently Asked Questions

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