Mitsubishi Positive Turning Inserts | CCMT DCMT TCMT VBMT

Mitsubishi Positive Turning Inserts — 366 Genuine SKUs in Stock

Factory-direct supply of 366 genuine Mitsubishi Materials positive-type turning inserts in stock at CNCHome-Beyond, covering 32 ISO shape variants (CCMT / DCMT / TCMT / VBMT / RCMT and 27 more) and 14 grades for steel, stainless steel, cast iron, and aluminum. Every insert is single-sided (7° or 11° clearance) for a sharper cutting edge and lower cutting force, manufactured in Japan under ISO 1832, and shipped globally at 30-50% below OEM list price.

What is a “Positive” Turning Insert?

In the ISO 1832 insert designation system, the second letter indicates the clearance angle: “P” (11°), “G” (7°), or “M” (5°). All three mean the insert is single-sided, with the cutting edge only on the top face. Compared to negative (N, 0°, double-sided) inserts, positive inserts deliver:

• Lower cutting forces — the positive rake face reduces radial force by 20-40%, ideal for slender shafts, thin-wall tubes, and small CNC Swiss-type lathes
• Sharper cutting edge — single-sided geometry allows precision grinding to a razor edge, perfect for mirror-finish finishing on steel (NX2525 / AP25N cermet grades)
• Better for aluminum & non-ferrous — the low cutting temperature of aluminum demands a sharp, uncoated edge (HTI10 K-class), which only positive inserts can provide without BUE
• Faster indexing — only one side to flip, no shim required, changeout in 10 seconds vs 30 for negative

Trade-off: Positive inserts have only 2-4 cutting edges (vs 4-8 for negative) and a thinner body (2.38-4.76 mm vs 4.76-6.35 mm), making them less suitable for heavy roughing or interrupted cuts. For those applications, see our Mitsubishi negative turning inserts collection instead.

ISO Nomenclature Decoded (Positive Turning Example)

Take CCMT120408-FM VP15TF — the most popular Mitsubishi positive turning insert:

For comparison, the negative equivalent is CNMG120408-MA UE6110 — notice the “N” vs “C” in position 2 (0° vs 7°), and the M-class M at position 3 (vs T for hole-and-chip-breaker on positive).

8 Major ISO Shape Families in Stock (32 Variants Total)

Mitsubishi’s positive turning insert lineup spans 8 main shape families with multiple tolerance variants (G = 7° precision / M = 7° with hole / E = 15° etc.), totaling 32 unique SKUs by shape. The most popular are listed first:

Top 8 Grades in Stock (14 Total)

Mitsubishi’s positive turning grade portfolio mirrors negative turning for most materials, but adds HTI10 as the signature aluminum grade (positive-exclusive). Top 8 by application frequency:

Compatible Tool Holders

Positive inserts use a different holder than negative inserts (the pocket geometry differs due to the 7° clearance). Mitsubishi-style positive holders follow ISO 5608:

Recommended Cutting Parameters (Starting Point)

Always run a test cut before committing to a production run. These values are starting points for stable CNC lathe setups with adequate coolant:

Positive vs Negative: When to Choose Each

Browse our Mitsubishi negative turning inserts collection for heavy roughing and high-MRR production with 4-8 cutting edges per insert.

Why Positive Inserts Are Better for Swiss-Type Lathes

Modern CNC Swiss-type lathes (Citizen, Star, Tsugami, Tornos) work on slender bar stock (3-32 mm diameter) with live tooling and sub-spindles. Positive inserts dominate this market for three reasons:

1. Lower radial force — Swiss workpieces are long and slender, so any radial force causes deflection and chatter. Positive inserts (especially 35° VBMT) reduce radial force by 20-40% vs negative.
2. Smaller IC sizes — Positive inserts come in 6 mm (CCMT 06) and 9 mm (CCMT 09) IC sizes that fit the compact Swiss tool turrets, while negative inserts typically start at 12 mm IC.
3. Single-side economy — Swiss lathes change inserts 5-10x more often than standard lathes due to small parts and high mix. The single-side design is faster to flip (10 sec vs 30 sec) which matters at high spindle utilization.

Frequently Asked Questions

Shop Related Mitsubishi Collections

Browse the full Mitsubishi Materials catalog at CNCHome-Beyond:

• Mitsubishi Materials Brand Page — all Mitsubishi product lines, history, and engineering support
• Mitsubishi Master Catalog — all Mitsubishi products (currently re-organizing into sub-collections)
• Mitsubishi Negative Turning Inserts — 277 CNMG / DNMG / VNMG / WNMG 0° double-sided inserts for heavy roughing
• Mitsubishi Threading Inserts — 16ER / 16IR / 11ER / 22ER threading inserts in US7020 + VP15TF
• Mitsubishi Milling Inserts — 115 SKUs of APKT / AOMT / SEKT / SNKT milling cutters

Other Global Brand Positive Turning Inserts

CNCHome-Beyond also stocks equivalent positive turning inserts from the world’s top 3 carbide brands. Compare grades, lead times, and pricing:

• KORLOY Master Catalog — 557 SKUs (CCMT / DCMT / TCMT / VBMT) in grades NC3225, NC3030, NC9125, PC8110
• KORLOY Brand Page — Korean carbide manufacturer, ISO 9001 certified, 12 grades for steel / stainless / cast iron
• Tungaloy Master Catalog — 443 SKUs (CCMT / DCMT / TCMT) in T9000-series CVD and AH8000-series PVD grades
• Tungaloy Brand Page — Japanese carbide specialist, 90+ years in cutting tools
• TaeguTec Master Catalog — full turning + milling + drilling lineup in TT7000 / TT9080 / TT5515 grades
• TaeguTec Brand Page — Korean multinational, ISCAR group sister brand

Shop More from CNCHome-Beyond

• Premium Carbide Inserts (All Global Brands) — 5,880 SKUs across 8 brands (Sandvik / Mitsubishi / Tungaloy / KORLOY / Iscar / Kyocera / OYYU / BEYOND)
• Best Sellers — 248 top-selling inserts, end mills, and tool holders across all brands
• Accessories for Indexable Holders — 155 SKUs of shims, screws, wrenches, and torque clamps for turning & milling holders