{"product_id":"hertel-8851987-turning-insert-vnmg331bh-ht115cr-cermet","title":"Hertel 8851987 Turning Insert VNMG331BH HT115CR Cermet","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL 8851987 is a VNMG331BH HT115CR cermet turning insert designed for precision external turning operations on CNC and manual lathes. This uncoated cermet insert features a 35-degree diamond shape (V-style) with a neutral hand orientation and a positive rake angle of 15 degrees. The 3\/8-inch inscribed circle and 1\/64-inch corner radius make it suitable for finishing and semi-finishing passes where tight tolerances and surface finish quality are critical. Machinists and toolroom operators select cermet grades like HT115CR for their hardness and wear resistance when cutting steel, cast iron, and similar ferrous materials at moderate to high cutting speeds.\u003c\/p\u003e\n\u003cp\u003eThis insert is intended for use in VNMG-compatible toolholders on production turning centers, CNC lathes, and manual turning equipment. Typical applications include finishing passes on steel shafting, bearing surfaces, and close-tolerance turned components where dimensional accuracy and low surface roughness are required. The G-style chip breaker geometry promotes controlled chip formation during light-to-moderate depth-of-cut operations. This is a trade-quantity item with a minimum order quantity of 10 inserts per order.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCermet insert material (HT115CR grade) provides high hardness and wear resistance for ferrous finishing applications\u003c\/li\u003e\n  \u003cli\u003e35-degree diamond insert shape (V) delivers sharp cutting geometry for precise turning\u003c\/li\u003e\n  \u003cli\u003ePositive rake angle of 15 degrees reduces cutting forces and heat generation\u003c\/li\u003e\n  \u003cli\u003eG chip breaker promotes controlled chip evacuation during finishing and semi-finishing cuts\u003c\/li\u003e\n  \u003cli\u003eNeutral hand orientation fits both right-hand and left-hand toolholder configurations\u003c\/li\u003e\n  \u003cli\u003eUncoated cermet substrate maintains consistent edge sharpness without coating buildup at the cutting edge\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in VNMG-style toolholders that accept a 3\/8-inch inscribed circle insert with a 0.150-inch hole diameter and clamp or pin holding method. Verify toolholder insert pocket specifications against VNMG331 insert geometry before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInsert seating and clamping should be performed by a qualified machinist or toolroom technician following the toolholder manufacturer's clamping torque guidelines. Ensure the machine spindle is fully stopped and all motion has ceased before indexing or replacing inserts. Inspect the insert pocket seat and locating pin for wear or debris before seating a new insert, as contamination can cause improper seating and premature edge failure. Follow shop safety protocols for handling sharp cutting inserts.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: VNMG331BH\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: HT115CR\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Cermet\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: 35-Degree Diamond (V)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Neutral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRake\u003c\/strong\u003e: Positive\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRake Angle\u003c\/strong\u003e: 15 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: G\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 3\/8 inches (0.3750 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 1\/64 inches (0.0156 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 16 mm (0.6299 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 3\/16 inches (0.1875 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.150 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 0 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTolerance Code\u003c\/strong\u003e: M\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClearance Code\u003c\/strong\u003e: N\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Clamp and Pin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.12 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 10\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: HERTEL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 8851987\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51747656073522,"sku":"8851987","price":431.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f060bb42e73eb5ac1317216824d88f0d.jpg?v=1788884126","url":"https:\/\/voomisupply.com\/products\/hertel-8851987-turning-insert-vnmg331bh-ht115cr-cermet","provider":"Voomi Supply","version":"1.0","type":"link"}