Korloy ERM16-2.5ISO PC9030 Metric External Threading Insert, 2.5 Pitch (10pcs)
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The Original Korloy ERM16-2.5ISO PC9030 is a heavy-duty Full Profile External Threading Insert designed for 2.5mm pitch metric ISO threads. This specific insert is the standard for producing large fasteners like M18, M20, and M22. The full profile design ensures that the insert cuts the entire thread shape—including the crest and root—providing superior dimensional consistency and a smooth finish that eliminates the need for manual deburring. Powered by the PC9030 PVD grade, it offers the ultimate heat resistance and edge toughness for machining Stainless Steel, Carbon Steel, and Tough Alloys.
Built for Heavy Loads: Cutting a 2.5mm pitch involves substantial material removal. The ERM16-2.5ISO is engineered with a reinforced cutting edge to withstand the high radial forces of large metric threads, while the PC9030 coating prevents chip welding and surface tearing.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | ERM16-2.5ISO |
| Thread Type | Metric ISO (Full Profile) |
| Pitch | 2.5 mm |
| Grade | PC9030 (Premium PVD) |
Core Performance Benefits:
- One-Pass Form Accuracy: Automatically finishes the thread's major diameter, ensuring your M20 bolts meet precise GO/NO-GO gauge standards.
- High-Toughness Substrate: Specifically designed to handle the intermittent impact and heavy chip load associated with 2.5mm pitch profiles.
- Anti-Adhesion Coating: The PC9030 nano-coating reduces friction, which is critical for preventing "smearing" when threading austenitic stainless steels.
- Optimized Rake Angle: Reduces cutting torque, allowing for smoother operation on medium-sized CNC lathes.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Total Number of Passes |
|---|---|---|
| Stainless (304/316) | 60 - 120 m/min | 12 - 18 Passes |
| Mild Steel (A36/1018) | 80 - 150 m/min | 10 - 14 Passes |
| Alloy Steel (4140) | 50 - 100 m/min | 14 - 20 Passes |
Compatible Tool Holders:
Fits all industry-standard 16ER / SER threading systems:
- External Threading Bar: SER 1616H16 / SER 2020K16 / SER 2525M16 / SER3232P16
Deep Thread Strategy: PC9030 vs. PC5300
When machining large 2.5mm pitches, the choice of grade impacts your cycle time:
Ideal for high-quality finishes in gummy materials. It stays sharper longer, which is vital for maintaining the correct thread angle in deep 2.5mm cuts.
The best choice if you have heavy interruptions or are threading very hard carbon steels. It offers slightly more edge protection against sudden chipping.
Machinist's Pro Tip: For 2.5mm ISO threads, always use a modified flank approach (setting the compound rest at 29°). This directs the chip away from the tool and prevents heat from concentrating on the very tip of the insert.
Packaging: 10 pieces per box.
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.