{"product_id":"tungaloy-16er-2-5iso-b-ah725-external-threading-carbide-insert","title":"Tungaloy 16ER 2.5ISO-B AH725 External Threading Carbide Insert (10pcs)","description":"\u003cdiv style=\"font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; color: #333; line-height: 1.6; max-width: 950px; margin: auto; border: 1px solid #e0e0e0; background-color: #fff; border-radius: 8px; overflow: hidden; user-select: none;\"\u003e\n\u003cdiv style=\"background-color: #47479f; color: #ffffff; padding: 45px 20px; text-align: center;\"\u003e\n\u003ch1 style=\"margin: 0; font-size: 28px; font-weight: bold; letter-spacing: 1px;\"\u003e\u003cspan style=\"color: rgb(255, 255, 255);\"\u003eTUNGALOY 16ER 2.5ISO-B AH725\u003c\/span\u003e\u003c\/h1\u003e\n\u003cp style=\"margin: 10px 0 0; font-size: 18px; opacity: 0.9;\"\u003eExternal ISO Metric Specialist | 2.5mm Pitch | AH725 Nano-PVD Grade\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 30px;\"\u003e\n\u003ch2 style=\"color: #47479f; border-bottom: 3px solid #47479F; display: inline-block; padding-bottom: 5px;\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eTungaloy 16ER 2.5ISO-B AH725\u003c\/strong\u003e is a heavy-duty \u003cstrong\u003eexternal threading insert\u003c\/strong\u003e engineered for 2.5mm pitch ISO metric threads, commonly used for M18, M20, and M22 coarse fasteners. This \u003cstrong\u003eindexable carbide insert\u003c\/strong\u003e features the advanced \u003cstrong\u003eAH725 PVD coated carbide\u003c\/strong\u003e grade, providing superior toughness for demanding \u003cstrong\u003eCNC machining\u003c\/strong\u003e cycles. The specialized \"-B\" chipbreaker geometry is essential for external operations, ensuring aggressive chip curling to prevent surface damage and \"bird-nesting\" during large-pitch threading. Manufactured in Japan, this insert is the professional choice for \u003cstrong\u003eprecision machining\u003c\/strong\u003e in stainless steel, carbon steel, and high-temp alloys.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 30px; background-color: #f4f4fb;\"\u003e\n\u003ch2 style=\"color: #47479f; text-align: center; margin-bottom: 25px;\"\u003eTechnical Designation Breakdown\u003c\/h2\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; justify-content: center; gap: 10px;\"\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 10px; text-align: center; min-width: 65px; background: white; border-radius: 4px;\"\u003e\n\u003cb style=\"color: #47479f; font-size: 18px;\"\u003e16\u003c\/b\u003e\u003cbr\u003e\u003csmall\u003eSize (IC)\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 10px; text-align: center; min-width: 65px; background: white; border-radius: 4px;\"\u003e\n\u003cb style=\"color: #47479f; font-size: 18px;\"\u003eE\u003c\/b\u003e\u003cbr\u003e\u003csmall\u003eExternal\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 10px; text-align: center; min-width: 65px; background: white; border-radius: 4px;\"\u003e\n\u003cb style=\"color: #47479f; font-size: 18px;\"\u003eR\u003c\/b\u003e\u003cbr\u003e\u003csmall\u003eRight Hand\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 10px; text-align: center; min-width: 65px; background: white; border-radius: 4px;\"\u003e\n\u003cb style=\"color: #47479f; font-size: 18px;\"\u003e2.5\u003c\/b\u003e\u003cbr\u003e\u003csmall\u003ePitch (mm)\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 10px; text-align: center; min-width: 65px; background: white; border-radius: 4px;\"\u003e\n\u003cb style=\"color: #47479f; font-size: 18px;\"\u003eISO\u003c\/b\u003e\u003cbr\u003e\u003csmall\u003eStandard\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 10px; text-align: center; min-width: 65px; background: white; border-radius: 4px;\"\u003e\n\u003cb style=\"color: #47479f; font-size: 18px;\"\u003eB\u003c\/b\u003e\u003cbr\u003e\u003csmall\u003eChipbreaker\u003c\/small\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 30px;\"\u003e\n\u003ch2 style=\"color: #47479f;\"\u003eTechnical Specifications: Metric vs. Imperial\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-top: 15px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #47479f; color: white;\"\u003e\n\u003cth style=\"padding: 12px; border: 1px solid #ddd; text-align: left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding: 12px; border: 1px solid #ddd; text-align: left;\"\u003eMetric (ISO)\u003c\/th\u003e\n\u003cth style=\"padding: 12px; border: 1px solid #ddd; text-align: left;\"\u003eImperial (TPI)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eThread Pitch\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e2.5 mm\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e10.16 Threads Per Inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eInscribed Circle (IC)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e9.525 mm\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e3\/8 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eTarget Application\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eExternal M18 - M22\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eHeavy Duty Coarse (10 TPI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 20px;\"\u003e\u003cstrong\u003ePitch Selection Guidance:\u003c\/strong\u003e The 2.5ISO is a \u003cstrong\u003eFull Profile\u003c\/strong\u003e insert. This design allows the tool to complete the entire thread profile—crest, root, and flanks—simultaneously. For \u003cstrong\u003eexternal threading\u003c\/strong\u003e of large bolts, this ensures dimensional consistency and high structural integrity, eliminating the need for manual cresting or additional finishing passes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 30px;\"\u003e\n\u003ch3 style=\"color: #47479f;\"\u003eGrade: AH725 PVD Nano-Coating\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eAH725 grade\u003c\/strong\u003e is a cornerstone in \u003cstrong\u003estainless steel turning\u003c\/strong\u003e and threading. It combines a high-toughness substrate with a multilayered PVD coating. This \u003cstrong\u003elong-tail keywords\u003c\/strong\u003e industry favorite offers exceptional resistance to thermal cracking and notch wear, resulting in significantly extended \u003cstrong\u003etool life\u003c\/strong\u003e in tough, abrasive materials.\u003c\/p\u003e\n\u003ch3 style=\"color: #47479f;\"\u003e-B Geometry: Precision Chipbreaker (槽型)\u003c\/h3\u003e\n\u003cp\u003eIn large-pitch \u003cstrong\u003eexternal threading\u003c\/strong\u003e, chips can become quite thick and hazardous. The \u003cstrong\u003e-B chipbreaker\u003c\/strong\u003e geometry forces these heavy chips to curl and snap, protecting the mirror-like surface finish and keeping the work area clear during \u003cstrong\u003eCNC machining\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin: 0 30px; padding: 25px; background-color: #47479f; color: white; border-radius: 12px;\"\u003e\n\u003ch3 style=\"margin-top: 0; border-bottom: 1px solid rgba(255,255,255,0.4); padding-bottom: 10px;\"\u003eRecommended Cutting Parameters\u003c\/h3\u003e\n\u003cp\u003eOptimized for \u003cstrong\u003eP (Steel) and M (Stainless Steel)\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul style=\"list-style-type: disc; padding-left: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Speed (Vc):\u003c\/strong\u003e 70 - 140 m\/min (230 - 460 SFM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Radial Depth (ap):\u003c\/strong\u003e 1.53 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Passes:\u003c\/strong\u003e 12 - 18 passes (Required for 2.5 pitch depth)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size: 13px; font-style: italic;\"\u003e*Pro Tip: For 2.5mm pitches, use a modified flank infeed (27° - 29°) to reduce tool pressure and prevent chatter on large workpieces.*\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 30px; background-color: #f9f9f9;\"\u003e\n\u003ch2 style=\"color: #47479f; text-align: center; margin-bottom: 30px;\"\u003eGlobal Verified Reviews\u003c\/h2\u003e\n\u003cdiv style=\"border: 2px solid #47479F; background: white; padding: 15px; margin-bottom: 15px; border-radius: 4px;\"\u003e\n\u003cp\u003e⭐⭐⭐⭐⭐ \u003cstrong\u003e\"Perfect for M20 production\"\u003c\/strong\u003e - \u003cem\u003eKlaus M., Germany\u003c\/em\u003e\u003cbr\u003e\"Consistent results. The 2.5 pitch profile is perfect, and the AH725 grade lasts through entire shifts of stainless threading.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; background: white; padding: 15px; margin-bottom: 15px; border-radius: 4px;\"\u003e\n\u003cp\u003e⭐⭐⭐⭐⭐ \u003cstrong\u003e\"Original Japanese quality\"\u003c\/strong\u003e - \u003cem\u003eKenichi T., Japan\u003c\/em\u003e\u003cbr\u003e\"Very tough insert. Even on interrupted cuts in alloy steel, the edge holds up beautifully. Highly recommended.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; background: white; padding: 15px; margin-bottom: 15px; border-radius: 4px;\"\u003e\n\u003cp\u003e⭐⭐⭐⭐ \u003cstrong\u003e\"Great Chip Management\"\u003c\/strong\u003e - \u003cem\u003eBrian S., USA\u003c\/em\u003e\u003cbr\u003e\"The -B chipbreaker is a lifesaver for external threads. No bird-nesting on the spindle even with heavy 2.5mm threads.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; background: white; padding: 15px; margin-bottom: 15px; border-radius: 4px;\"\u003e\n\u003cp\u003e⭐⭐⭐⭐⭐ \u003cstrong\u003e\"Excellent Surface Quality\"\u003c\/strong\u003e - \u003cem\u003ePaolo R., Italy\u003c\/em\u003e\u003cbr\u003e\"Flawless finish on the thread flanks. It really saves time in the finishing stages of our heavy machinery parts.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; background: white; padding: 15px; border-radius: 4px;\"\u003e\n\u003cp\u003e⭐⭐⭐⭐⭐ \u003cstrong\u003e\"Consistent and Durable\"\u003c\/strong\u003e - \u003cem\u003eJames L., UK\u003c\/em\u003e\u003cbr\u003e\"Reliable performance over hundreds of parts. Fits our SER 2525 holders perfectly with zero vibration.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 30px;\"\u003e\n\u003ch2 style=\"color: #47479f; text-align: center;\"\u003eTechnical Q\u0026amp;A\u003c\/h2\u003e\n\u003cdiv style=\"margin-top: 25px;\"\u003e\n\u003cdiv style=\"border-left: 6px solid #47479F; background: #f4f4ff; padding: 15px; margin-bottom: 15px; border-radius: 0 8px 8px 0;\"\u003e\n\u003cp style=\"font-weight: bold; margin: 0; color: #47479f;\"\u003eQ: Which tool holder does this fit?\u003c\/p\u003e\n\u003cp style=\"margin: 10px 0 0;\"\u003eA: This fits any external threading holder with a size 16 (3\/8\" IC) pocket, such as the **SER2020K16** or **SER2525M16**.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left: 6px solid #47479F; background: #f4f4ff; padding: 15px; margin-bottom: 15px; border-radius: 0 8px 8px 0;\"\u003e\n\u003cp style=\"font-weight: bold; margin: 0; color: #47479f;\"\u003eQ: Can I cut internal threads with this?\u003c\/p\u003e\n\u003cp style=\"margin: 10px 0 0;\"\u003eA: No. This is a **16ER** (External Right-hand) insert. For internal work, you must use the **16IR** series.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left: 6px solid #47479F; background: #f4f4ff; padding: 15px; border-radius: 0 8px 8px 0;\"\u003e\n\u003cp style=\"font-weight: bold; margin: 0; color: #47479f;\"\u003eQ: Is AH725 good for High-Tensile Steel?\u003c\/p\u003e\n\u003cp style=\"margin: 0;\"\u003eA: Yes! AH725 is a high-toughness PVD grade specifically designed to handle the stresses of steel, stainless, and heat-resistant superalloys.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background-color: #47479f; color: white; padding: 25px; text-align: center; border-radius: 0 0 8px 8px;\"\u003e\n\u003ch4 style=\"margin: 0; font-size: 18px;\"\u003eExpert Machining Tip: Grade Selection\u003c\/h4\u003e\n\u003cp style=\"font-size: 14px; margin-top: 10px;\"\u003eFor heavy \u003cstrong\u003eexternal threading\u003c\/strong\u003e, PVD grades like **AH725** are superior to CVD because they maintain a sharper cutting edge. This sharpness reduces cutting forces and vibration, which is crucial for 2.5mm pitches, resulting in better \u003cstrong\u003etool life\u003c\/strong\u003e and profile accuracy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size: 10px; color: #eee; text-align: center; margin-top: 5px;\"\u003e© Technical Content by cnchome-beyond.com - Scraping Protection Active\u003c\/p\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43143193985196,"sku":"16ER25ISO-B AH725","price":94.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/Tungaloy_16ER_2.5ISO-B_AH725_External_Threading_Carbide_Insert_for_M18_M20_M22_2.5mm_Pitch_ISO_Metric_Threads.jpg?v=1773388311","url":"https:\/\/cnchome-beyond.com\/products\/tungaloy-16er-2-5iso-b-ah725-external-threading-carbide-insert","provider":"CNCHome-Beyond","version":"1.0","type":"link"}