CNMG120412 PR1125 (10pcs)
CNMG120408PS PR1125 (10pcs)
CNMG120408MU PR1125 (10pcs)
CNMG120412 CA6525 (10pcs)
CNMG120408TK CA6525 (10pcs)
CNMG120408MS CA6525 (10pcs)
CNMG120412PT CA5525 (10pcs)
CNMG120412HQ CA5525 (10pcs)
CNMG120412GS CA5525 (10pcs)
CNMG120408PT CA5525 (10pcs)
DNMG150408GS CA5515 (10pcs)
DNGA150608 A65 (10pcs)
DNGA150408 A65 (10pcs)
DNGA150404 A65 (10pcs)
DNMG150408GS CA5525 (10pcs)
DNMG150408CQ CA5525 (10pcs)
DNMG150404GS CA5525 (10pcs)
DNMG150404CQ CA5525 (10pcs)
DNMG110408GS CA5525 (10pcs)
DNMG110404HQ CA5525 (10pcs)
DNMG110404GS CA5525 (10pcs)
DNMG150404HQ TN60 (10pcs)
DNMG110404HQ TN60 (10pcs)
DNMG110402HQ TN60 (10pcs)
DNMG150608PS CA5525 (10pcs)
DNMG150608HQ CA5525 (10pcs)
DNMG150608CQ CA5525 (10pcs)
DNMG150604PS CA5525 (10pcs)
DNMG150604HQ CA5525 (10pcs)
DNMG150412HQ CA5525 (10pcs)
DNMG150412CQ CA5525 (10pcs)
DNMG150408HQ CA5525 (10pcs)
DNMG150408HQ TN60 (10pcs)
SNMG120408MS PR1125 (10pcs)
SNMG120408MQ CA6515 (10pcs)
SNMG120408HQ TN6020 (10pcs)
SNMG120408HQ TN60 (10pcs)
SNMG120408HQ CA5525 (10pcs)
SNMG120408-MQ CA6525 (10pcs)
SNMG120408 CA6525 (10pcs)
SNMG120404MS PR1535 (10pcs)
SNMG120404MS PR1125 (10pcs)
SNMG120404HQ TN60 (10pcs)
SNMG120404HQ CA5525 (10pcs)
SNMG120412KH CA315 (10pcs)
SNMG120412HQ CA5525 (10pcs)
SNMG120412 CA5525 (10pcs)
TNGG160404R-S PR1535 (10pcs)
About Kyocera Negative Turning Inserts
Kyocera negative turning inserts are precision carbide tools for heavy-duty CNC turning of steel, stainless, cast iron, and hardened materials. The Kyocera CNMG series (80° diamond) is the most popular turning geometry globally, with 12 chip-breaker variants covering every application from finishing to heavy roughing. Kyocera's proprietary MEGACOAT coating technology (including MEGACOAT NANO and MEGACOAT HARD) sets the standard for tool life in difficult materials.
Every Kyocera insert on this page is genuine OEM product from Kyocera Corporation (Japan, est. 1959), shipped with full lot traceability. CNCHome-Beyond is an authorized Kyocera 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.
Kyocera Negative Insert Geometries at a Glance
| Series | Shape | IC Size | Type | Best For |
|---|---|---|---|---|
| CNMG | 80° diamond, double-sided | 12 mm | Negative general purpose | 80% of all steel turning — most popular |
| CNGA | 80° diamond, double-sided, no chip-breaker | 12 mm | Ceramic negative | Hardened steel (HRC 55+), high-speed continuous cut |
| CNGG | 80° diamond with chip-breaker (R-type) | 12 mm | Cermet precision | Steel precision finishing with cermet edge |
| TNGA | 60° triangle, double-sided | 16 mm | Ceramic negative | Hardened steel at high speed (200-350 m/min) |
Need to compare with other brand geometries? See our complete Insert Grade Cross-Reference Tool and SKU Cross-Reference for direct equivalents between Kyocera, Sandvik, Kennametal, Iscar, Walter, and Tungaloy.
Popular Kyocera Grades for Negative Turning
| Grade | Coating / Material | Workpiece | Recommended Speed | Best For |
|---|---|---|---|---|
| CA6525 | MEGACOAT (CVD Al2O3 thick) | Steel general purpose (P10-P30) | 120-220 m/min | Workhorse — 90% of steel turning |
| CA5525 | MEGACOAT (CVD TiCN/Al2O3) | Steel finishing (P05-P20) | 150-250 m/min | Steel finishing and light roughing |
| CA5515 | MEGACOAT (CVD) | Steel precision (P05-P15) | 180-280 m/min | Steel high-speed finishing |
| PR1125 | MEGACOAT NANO (PVD TiAlN) | Stainless (M15-M30), high-temp alloys | 100-180 m/min | Stainless steel, Inconel, titanium |
| PR1535 | MEGACOAT NANO (PVD super-nano) | Hardened steel (HRC 45+), cast iron | 80-150 m/min | Hard turning, interrupted cuts |
| PV720 | MEGACOAT (PVD for aluminum) | Aluminum, non-ferrous (N05-N25) | 300-800 m/min | Aluminum milling and turning |
| TN60 | Cermet (uncoated TiCN-based) | Steel precision (P05-P15) | 180-300 m/min | Steel mirror-finish turning |
| A65 / A66N | Ceramic (SiAlON / Al2O3) | Hardened steel (HRC 50+), cast iron | 200-400 m/min | High-speed continuous cut hardened steel |
About MEGACOAT: Kyocera's proprietary coating technology uses alternating nano-layers of TiAlN and Al2O3 for exceptional wear resistance and thermal stability. MEGACOAT NANO adds 1000+ sub-layers for stainless and high-temp alloys. MEGACOAT HARD targets hardened steel up to HRC 65. Use our Speeds & Feeds Calculator to dial in the exact parameters for your specific grade.
Kyocera Chip-Breaker Reference (12 Variants)
Kyocera's chip-breaker system is the most comprehensive in the industry. Each chip-breaker is optimized for a specific operation type:
| Chip-Breaker | Application | Depth of Cut | Feed Rate | Best With Grade |
|---|---|---|---|---|
| HQ (heavy) | Heavy roughing, first pass on rough forgings | 3.0-8.0 mm | 0.25-0.55 mm/rev | CA6525, CA5525 |
| HS (heavy sharp) | Heavy interrupted cuts | 2.0-5.0 mm | 0.20-0.45 mm/rev | CA6525 |
| MQ (medium) | General purpose medium cutting | 1.5-4.0 mm | 0.15-0.35 mm/rev | CA6525, CA5525 |
| MS (medium soft) | Stainless steel medium cutting | 1.0-3.0 mm | 0.10-0.30 mm/rev | PR1125 |
| PS (precision sharp) | Steel precision finishing | 0.5-2.0 mm | 0.08-0.20 mm/rev | CA5515, CA5525 |
| MU (medium universal) | Universal medium cutting, mixed conditions | 1.5-3.5 mm | 0.15-0.35 mm/rev | CA6525, CA5525 |
| PP (precision positive) | Light finishing, sharp edge | 0.3-1.5 mm | 0.05-0.15 mm/rev | CA5515, CA5525 |
| GS (grooving/soft) | Stainless light cutting, low-power machines | 0.8-2.5 mm | 0.10-0.25 mm/rev | PR1125 |
| GT (general turning) | General steel turning, balanced | 1.0-3.0 mm | 0.15-0.30 mm/rev | CA6525, CA5525 |
| TK (high feed) | High-feed roughing, profiling | 2.5-6.0 mm | 0.30-0.60 mm/rev | CA6525 |
| CQ (cast iron) | Cast iron turning, interrupted | 1.5-4.0 mm | 0.20-0.40 mm/rev | CA6525 |
| GP (general purpose) | General purpose light to medium | 0.8-2.5 mm | 0.10-0.25 mm/rev | CA6525, CA5525 |
How to Choose a Kyocera Negative Insert
Step 1: Match the geometry to operation. For 80% of steel turning applications, choose CNMG (80° diamond, double-sided, 4 cutting edges per insert). For hardened steel (HRC 55+) high-speed cutting, choose CNGA (ceramic, no chip-breaker, sharper edge). For precision finishing with cermet, choose CNGG. For 60° triangle approach angles, choose TNGA.
Step 2: Match the grade to material. Steel → CA6525 (workhorse) or CA5525 (finishing). Stainless/high-temp → PR1125. Hardened steel → PR1535 or A65/A66N ceramic. Cast iron → CA6525 or CQ chip-breaker. Aluminum → PV720. Precision steel finishing → TN60 cermet.
Step 3: Match the chip-breaker to depth of cut. Light finishing (0.3-1.5mm) → PP, PS, GP. Medium (1.5-4mm) → MQ, MU, GT. Heavy (3-8mm) → HQ, HS, TK. Use the table above to find the right combination.
Step 4: Match the holder. Kyocera CNMG fits the PCLNR/L, DCLNR/L, MCLNR/L, MWLNR/L tool holder families. CNGA ceramic fits the same holders. CNGG cermet fits the same. CNCHome-Beyond carries compatible aftermarket holders at 30-50% below OEM — see our turning tool holder guide and Insert Holder Selector.
Compatible Tool Holders
Kyocera negative inserts fit the following CNCHome-Beyond tool holder families (all ISO 5608 standard, drop-in compatible with Kyocera OEM holders):
- Double-Clamp External Holders — for heavy CNMG roughing
- Multi-Lock External Holders — for general CNMG medium cutting
- Lever-Lock (P-Type) External Holders — for quick-change high-mix production
- Screw-Clamp Boring Bars — for internal turning with negative inserts
Need help matching inserts to holders? Use our Insert Holder Selector Tool for a guided 3-step match.
Cross-Brand Equivalents to Kyocera CNMG / CNGA / TNGA
Kyocera negative insert geometries are dimensionally interchangeable with other major brands. Direct equivalents:
| Kyocera | Mitsubishi | Sandvik | Kennametal | Iscar |
|---|---|---|---|---|
| CNMG 120408 | CNMG 120408 | CNMG 120408 | CNMG 120408 | CNMG 120408 |
| CNGA 120408 (ceramic) | CNGA 120408 | CNGA 120408 | CNGA 120408 | CNGA 120408 |
| TNGA 160408 (ceramic) | TNGA 160408 | TNGA 160408 | TNGA 160408 | TNGA 160408 |
Looking for a Mitsubishi or Sandvik equivalent at lower cost? See Mitsubishi negative turning inserts or Tungaloy negative turning inserts for direct alternatives, and use our Insert Grade Cross-Reference Tool for grade-to-grade equivalents.
Featured Bestsellers (6)
Kyocera CNMG 1204 CA6525 Series — Steel Workhorse
The CNMG 120408 CA6525 with chip-breaker variants (HQ/HS/MQ/PS/MU) is the most popular Kyocera turning insert for steel. CA6525 MEGACOAT grade handles P10-P30 steel at 120-220 m/min. The 12mm IC double-sided insert gives 4 cutting edges per insert.
- CNMG120408MQ PR1125 - 1.6mm nose, medium cutting, PVD stainless
- CNMG120408PS CA6525 - 1.6mm nose, precision, CVD steel
- CNMG120408 CA6525 - 1.6mm nose, general purpose, CVD steel
Kyocera CNMG 1204 PR1125 Series — Stainless Steel Premium
The CNMG 120408 PR1125 with MEGACOAT NANO coating is Kyocera's premium grade for stainless steel (M15-M30). PR1125 is the workhorse PVD grade for stainless, high-temp alloys, and titanium. The NANO coating has 1000+ sub-layers for exceptional wear resistance.
- CNMG120408MQ PR1535 - 1.6mm nose, hardened steel
- CNMG120408HQ PR1125 - 1.6mm nose, heavy roughing, PVD stainless
Kyocera TNGA Ceramic Series — High-Speed Hardened Steel
The TNGA 160408 A65 is a SiAlON ceramic insert designed for high-speed continuous cut of hardened steel (HRC 50+) at 200-400 m/min. 16mm IC, double-sided, 6 cutting edges. Best for hard turning in place of grinding.
- Ceramic Turning Inserts TNGA160408 A65 (10pcs) - 1.6mm nose, ceramic high-speed
- CNGG120404R TN60 (10pcs) - cermet precision finishing
Frequently Asked Questions
What is Kyocera MEGACOAT coating technology?
MEGACOAT is Kyocera's proprietary coating family for carbide inserts. Standard MEGACOAT uses alternating layers of TiCN and Al2O3 for steel applications. MEGACOAT NANO adds 1000+ nano-scale sub-layers for stainless and high-temp alloys. MEGACOAT HARD is optimized for hardened steel up to HRC 65. The coating reduces wear, extends tool life, and allows higher cutting speeds than uncoated or TiN-coated inserts.
What is the difference between Kyocera CA6525 and CA5525?
CA6525 is the workhorse CVD grade for general purpose steel turning (P10-P30). It has a thicker Al2O3 layer for wear resistance in roughing. CA5525 is the lighter CVD grade for finishing (P05-P20) with a thinner coating and sharper cutting edge. Use CA6525 for the bulk of steel turning; use CA5525 for finishing and lighter cuts.
What is Kyocera PR1125 grade best for?
PR1125 is the workhorse PVD grade with MEGACOAT NANO coating. It is the best choice for stainless steel (M15-M30), high-temperature alloys, and titanium. The NANO coating handles the work-hardening tendency of stainless better than CVD grades. Use PR1125 with chip-breakers GS, MS, or MU for stainless applications.
What is the equivalent of Kyocera CNMG 120408 in other brands?
Kyocera CNMG 120408 is the industry-standard negative turning insert geometry (80° diamond, 12mm IC, 4 cutting edges, 0.8mm nose). Direct equivalents: Mitsubishi CNMG 120408 US7020, Sandvik CNMG 120408 GC4325, Kennametal CNMG 120408 KC7315, Iscar CNMG 120408 IC8150, Tungaloy CNMG 120408 T9125. All are dimensionally interchangeable on the same external turning tool holder. For grade cross-reference and detailed equivalent table, see our Insert Grade Cross-Reference Tool.
What is the difference between CNMG and CNGA inserts?
CNMG has a chip-breaker groove on both faces; CNGA has a flat (no chip-breaker) on both faces. CNGA is used for heavy roughing with strong cutting forces and is typically a ceramic grade (A65/A66N) for hardened steel high-speed cutting. CNMG is for general purpose with chip control. CNGA ceramic is preferred when you need maximum tool life at high speeds (200-400 m/min) on hardened steel; CNMG is preferred for variable conditions with chip control.
What is the minimum order quantity for Kyocera negative turning inserts?
Sample orders start at 1 piece for grade validation. Standard production orders are 10-50 pieces per item. Bulk pricing tiers: 2-9 pieces 6% off, 10+ pieces 12% off (auto-applied at checkout). For custom grades or chip-breakers not in our standard catalog, MOQ is 200 pieces with 6-8 week lead time from Kyocera Japan. See our warranty and return policy for details on grade validation samples.
Related Kyocera Collections
Order Kyocera Negative Turning Inserts or Request a Quote
Need a grade or chip-breaker not in our standard catalog? Send us a part number, grade spec, and quantity — we will return a formal quote within 24 hours. Custom Kyocera geometries available on 6-8 week lead time.
CNCHome-Beyond — Authorized Kyocera Distributor. Genuine OEM product, full lot traceability, same-day dispatch from Hangzhou for orders placed before 3 PM China time.
Want to know more about Kyocera grades, MEGACOAT coating, or chip-breaker selection? Read our CNC tooling knowledge base or check the complete cross-reference tool for grade-to-grade equivalents.