Kyocera Positive Turning Inserts | CCMT DCMT TCMT VBMT

Kyocera Positive Turning Inserts — 357 Genuine SKUs in Stock

Factory-direct supply of 357 genuine Kyocera positive-type turning inserts in stock at CNCHome-Beyond, covering 22 ISO shape variants (CCMT / DCMT / TCMT / VBMT / RCMX and 17 more) and 15 carbide 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 (TN60 / TN6020 cermet grades)
• Better for aluminum & non-ferrous — the low cutting temperature of aluminum demands a sharp, uncoated edge (KW10 K-class), which only positive inserts can provide without BUE
• Better for cast iron — Kyocera’s CA-series (CA4515/CA5515/CA5525/CA6515/CA6525) with MEGACOAT BLACK coating is purpose-built for gray and ductile iron
• 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 Kyocera negative turning inserts collection instead.

ISO Nomenclature Decoded (Positive Turning Example)

Take CCMT120408GK PR1225 — the most popular Kyocera positive turning insert:

22 ISO Shape Variants in Stock (8 Major Families)

Kyocera’s positive turning insert lineup spans 8 main shape families with multiple tolerance variants (G = 7° precision ground / M = 7° with hole), totaling 22 unique SKUs by shape. The most popular are listed first:

15 Grades in Stock (Steel / Cast Iron / Aluminum)

Kyocera’s positive turning grade portfolio covers 3 workpiece categories with 3 dedicated grade series:

Compatible Tool Holders

Positive inserts use a different holder than negative inserts (the pocket geometry differs due to the 7° clearance). Kyocera-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 Kyocera negative turning inserts collection for heavy roughing and high-MRR production with 4-8 cutting edges per insert.

Why Kyocera Positive Inserts Dominate Cast Iron Machining

The CA-series (CA4515 / CA5515 / CA5525 / CA6515 / CA6525) is Kyocera’s signature MEGACOAT BLACK-coated grade family, purpose-built for cast iron (gray iron, ductile iron, compacted graphite iron). The MEGACOAT BLACK coating is a thick Al₂O₃ layer that:

1. Resists abrasive wear from cast iron dust (which contains silicon carbide particles)
2. Handles high heat from continuous cast iron turning (high Vc 200-400 m/min possible)
3. Resists built-up edge even at high temperatures (cast iron chips are sticky)
4. Provides 2-3x longer tool life vs standard CVD coatings in cast iron

The CA-series is available only in positive geometry because the sharp 7° positive cutting edge maximizes the coating’s wear resistance. For any gray iron, ductile iron, or CGI (compacted graphite iron) job, CA5525 is the industry-standard workhorse grade.

Frequently Asked Questions

Shop Related Kyocera Collections

Browse the full Kyocera catalog at CNCHome-Beyond. Kyocera has 21+ sub-collections covering every major insert family:

• Kyocera Brand Page — all Kyocera product lines, MEGACOAT coating technology, engineering support
• Kyocera Negative Turning Inserts — CNMG / DNMG / WNMG / TNMG / SNMG 0° double-sided inserts for heavy roughing
• Kyocera Back Turning Inserts — ABW / ABS series for axial undercutting
• Kyocera Grooving Inserts — GDM / GMM / GMG series for radial grooving (O-ring, snap-ring, parting-off)
• Kyocera Threading Inserts — 16ER / 16IR threading inserts in PR1225 grade
• Kyocera Milling Inserts — APKT / AOMT / SEKT / SNKT milling cutters
• Kyocera CC 80° Diamond Positive — CCMT / CCGT 80° square positive inserts (most popular shape)

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

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)