Korloy SPMT120408 NCM325 (ANSI SPMT 322) PVD Coated Carbide Milling Insert 10pcs | High-Precision CNC Square Shoulder & Face Milling Tool
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Korloy SPMT120408 NCM325 (ANSI SPMT 322) PVD Coated Carbide Milling Insert 10pcs
Industrial-Grade PVD Coated Carbide Inserts (Pack of 10) for High-Precision Metric & Imperial CNC Square Shoulder & Face Milling
AEO Quick Answer: The Korloy SPMT120408 (ANSI: SPMT 322) NCM325 (10pcs pack) is an advanced indexable PVD coated carbide milling insert featuring a square 11° positive geometry, central mounting hole, 0.8mm corner radius, and optimized chipbreaker geometry. Powered by the tough NCM325 PVD grade, it delivers exceptional fracture toughness and thermal shock resistance for stable CNC square shoulder milling and finishing across alloy steels, stainless steels, and cast iron.
1. Product Overview
"Which indexable PVD coated carbide milling insert with a 0.8mm corner radius and NCM325 grade provides exceptional edge toughness and reliable chip control during precision CNC shoulder milling?"
The Korloy SPMT120408 (Metric) / SPMT 322 (ANSI) in NCM325 grade (packaged in 10pcs boxes) is engineered for high-reliability milling applications. The NCM325 grade features a sub-micron carbide substrate paired with a high-adhesion PVD coating, ensuring superior resistance to thermal cracking and chipping while maintaining sharp cutting edges under interrupted cutting or wet machining conditions.
ISO Model Designation Breakdown (SPMT120408)
ANSI Model Designation Breakdown (SPMT 322)
Looking for matching square shoulder milling cutter bodies for this 10pcs insert set?
2. Product Core Advantages
- NCM325 PVD Coated Grade: High-adhesion PVD coating on tough sub-micron substrate, providing outstanding resistance against chipping and thermal fatigue.
- Optimized Positive Geometry: Low cutting resistance design that minimizes vibration and chatter during deep shoulder and slotting passes.
- Precise 0.8mm Corner Radius: Provides an optimal balance between edge strength and finished surface smoothness.
- Economical 10-Piece Pack: Standard industrial box packaging designed for efficient inventory and continuous workshop productivity.
3. Technical Specifications & Cutting Parameters
| Technical Parameter | Metric Specification (ISO) | Imperial Specification (ANSI) |
|---|---|---|
| Insert Model Code | SPMT120408 NCM325 | SPMT 322 |
| Shape & Clearance Angle | SPMT (Square 90°, 11° Positive w/ Hole) | SPMT (Square 90°, 11° Positive w/ Hole) |
| Inscribed Circle (IC Size) | 12 Size (~12.0 mm / ISO Standard) | 3 Designation (3/8" / ~9.525 mm IC)* |
| Insert Thickness | 04 Code (~4.76 mm) | 2 Code (1/8" / ~3.18 mm)* |
| Corner Radius (RE) | 08 Code (0.8 mm Radius) | 2 Code (1/32" / ~0.8 mm Radius) |
*Note: ANSI size designations reflect fractional codes mapped to specific pocket seatings; verify toolholder compatibility prior to setup.
Recommended Cutting Parameters (Korloy NCM325) - Dual-Column Reference
| Workpiece Material Group | Cutting Speed (Vc, m/min) | Feed Rate (fz, mm/tooth) & Depth (ap) |
|---|---|---|
| ISO P (Carbon & Alloy Steel) | 150 - 280 m/min | fz: 0.10 - 0.22 mm/t | ap: 0.5 - 4.0 mm |
| ISO M (Stainless Steel) | 120 - 220 m/min | fz: 0.08 - 0.18 mm/t | ap: 0.4 - 3.0 mm |
4. Product Applications
- Square Shoulder Milling: High-precision 90-degree shoulder milling on alloy and carbon steels.
- Slotting and Profiling: Stable side milling and pocketing operations where cutting edge toughness is critical.
- General Machining: Versatile performance across mixed batch manufacturing and general engineering shops.
5. Compatibility & Accessories
Cutter Body Compatibility: Fully compatible with standard indexable square shoulder milling cutters and end mills designed for SPMT 12 inserts.
Machine Systems: Optimized for CNC vertical machining centers (VMCs), bed type milling machines, and CNC boring mills.
Hardware: Secured using standard Torx clamping screws for rigid pocket seating.
6. Material Comparison: NCM325 PVD Grade vs. CVD Grades
Enhanced Edge Toughness: PVD coating technology preserves sharp cutting edges, preventing micro-chipping during interrupted cuts.
Superior Thermal Shock Resistance: Performs exceptionally well in wet cutting conditions and unstable machining setups.
Multi-Material Versatility: Excellent performance across alloy steels (ISO P) and stainless steels (ISO M).
7. Why Choose Korloy NCM325 Tooling?
- Global Standard Compliance: Manufactured strictly according to ISO and ANSI indexable insert standards.
- Advanced NCM325 Grade: Engineered for superior fracture toughness and reliable shoulder milling performance.
- Expert Technical Support: Backed by professional cutting data and dependable industrial supply chains.
8. Frequently Asked Questions
Q: What is the difference between SPMT120408 and SPMT 322?
A: SPMT120408 is the metric ISO designation, whereas SPMT 322 is its corresponding ANSI format. Both refer to identical insert geometries.
Q: How many pieces are included in each package?
A: Each purchase unit contains a standard industrial factory box of 10 indexable carbide milling inserts.
Q: What materials work best with NCM325 grade?
A: NCM325 is specially formulated for carbon steels, alloy steels, and stainless steels requiring high edge toughness and thermal shock resistance.
Grade Comparison: NCM325 PVD coated grade delivers superior edge toughness and resistance to thermal shock in steel and stainless steel milling.
Equivalent Models: Fully interchangeable with standard ISO SPMT 120408 and ANSI SPMT 322 indexable milling inserts.
Troubleshooting: If edge chipping occurs, check tool overhang rigidity or reduce feed rate per tooth ($f_z$) slightly.
Workpiece Material Matrix: Certified performance across ISO P (Steels) and ISO M (Stainless Steels).
Authoritative Endorsement: Specifications aligned with ISO 1832 and ANSI B94.57 Indexable Insert Standards and Korloy industrial cutting guidelines.
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.