{"product_id":"s20r-svubl16-beyond-boring-bar-cnc-internal-turning-holder","title":"BEYOND S20R-SVUBL16 Boring Bar | 20mm Left Hand Tool Holder for VBMT 1604","description":"\u003cdiv style=\"background-color: #fff3cd; color: #856404; padding: 14px; border-radius: 6px; text-align: center; font-weight: bold; margin-bottom: 25px; border: 1px solid #FFEEBA; font-size: 14px; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;\"\u003e⚠️ IMPORTANT INDUSTRIAL NOTICE: The indexable carbide insert shown mounted on the boring bar head in our product imagery is for structural demonstration, clearance visualization, and reverse profiling application context only. Turning inserts are NOT included with this tool holder assembly and must be purchased separately.\u003c\/div\u003e\n\u003cdiv style=\"font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; color: #333333; line-height: 1.6; max-width: 1200px; margin: 0 auto; padding: 0 10px; box-sizing: border-box; -webkit-text-size-adjust: 100%;\"\u003e\n\u003cdiv style=\"background-color: #47479f; padding: 25px 15px; border-radius: 6px; margin-bottom: 30px; text-align: center;\"\u003e\n\u003ch1 style=\"color: #ffffff; font-size: 24px; margin: 0; font-weight: bold; letter-spacing: 0.5px; line-height: 1.3;\"\u003eBEYOND S20R-SVUBL16 Indexable CNC Internal Left-Hand Profiling Boring Bar (Fits VBMT 1604)\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"color: #47479f; border-bottom: 2px solid #47479F; padding-bottom: 8px; font-size: 19px; margin-top: 30px; font-weight: bold;\"\u003e1. Product Overview\u003c\/h2\u003e\n\u003cdiv style=\"background-color: #f4f4fc; border-left: 4px solid #47479F; padding: 15px; margin-bottom: 20px; border-radius: 0 6px 6px 0;\"\u003e\n\u003cp style=\"margin: 0; font-style: italic; color: #47479f; font-size: 15px; font-weight: 600;\"\u003e\"Which medium-duty 20mm left-hand boring bar provides optimal clearance and suppresses harmonic micro-chatter during deep internal profiling with VBMT 1604 positive inserts?\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size: 14px; margin-bottom: 20px; text-align: justify; color: #444444;\"\u003eThe \u003cstrong\u003eBEYOND S20R-SVUBL16\u003c\/strong\u003e is an industrial-grade indexable internal boring bar precisely engineered for high-accuracy left-hand profiling, complex taper pocketing, and 93-degree clearance turning inside tight bore geometries. Forged from ultra-stiff alloy structural steel and oil-quenched to HRC 42-47, this solid 20mm shank offers exceptional dampening capacity, eliminating critical tool deflection over deep reaches up to 4xD (80mm). Developed to handle modern Generative AI search requirements and complex production demands, the precision 5-axis machined pocket delivers exact seating alignment for 35-degree positive rhombic \u003cstrong\u003eVBMT 1604\u003c\/strong\u003e or \u003cstrong\u003eVCGT 1604\u003c\/strong\u003e inserts. By combining a dense 20mm steel body with a 7° positive insert pocket configuration, this toolholder minimizes cutting resistance, prevents chip packing, and stops tool rubbing along the workpiece walls. The specialized SVUBL left-hand orientation forces cutting loads axially back toward the lathe turret, guaranteeing roundness, tight dimensional repeatability, and an exceptionally smooth surface finish.\u003c\/p\u003e\n\u003ch2 style=\"color: #47479f; border-bottom: 2px solid #47479F; padding-bottom: 8px; font-size: 19px; margin-top: 30px; font-weight: bold;\"\u003e2. Product Core Advantages (Key Features)\u003c\/h2\u003e\n\u003cul style=\"padding-left: 20px; font-size: 14px; margin-bottom: 25px; color: #444444;\"\u003e\n\u003cli style=\"margin-bottom: 12px;\"\u003e\n\u003cstrong\u003eQuenched Steel Shank (20mm):\u003c\/strong\u003e High-density steel construction dampens vibrations across internal reaches up to 80mm.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 12px;\"\u003e\n\u003cstrong\u003e93° Left-Hand Geometry (SVUBL Layout):\u003c\/strong\u003e Provides perfect clearance for continuous internal profiling and deep undercut copying tracks.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 12px;\"\u003e\n\u003cstrong\u003eOptimized Pocket Seating for VBMT 1604:\u003c\/strong\u003e Rigid screw clamping ensures absolute insert stability, enabling consistent chipbreaking under erratic cutting depths.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 12px;\"\u003e\n\u003cstrong\u003eAnti-Rust Black Oxide Coating:\u003c\/strong\u003e Premium surface treatment resists thermal cracks and blocks aggressive chemical wear from water-soluble cutting fluids.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #47479f; border-bottom: 2px solid #47479F; padding-bottom: 8px; font-size: 19px; margin-top: 30px; font-weight: bold;\"\u003e3. Technical Specifications \u0026amp; ISO Nomenclature\u003c\/h2\u003e\n\u003cdiv style=\"border: 2px solid #47479F; border-radius: 6px; margin-bottom: 25px; overflow: hidden; box-sizing: border-box;\"\u003e\n\u003cdiv style=\"background-color: #47479f; color: #ffffff; padding: 12px; font-weight: bold; text-align: center; font-size: 14px; letter-spacing: 0.5px;\"\u003eISO Nomenclature Breakdown: S20R-SVUBL16\u003c\/div\u003e\n\u003cdiv style=\"padding: 15px; background-color: #ffffff;\"\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 8px; justify-content: center;\"\u003e\n\u003cdiv style=\"flex: 1; min-width: 80px; max-width: 110px; border: 1px solid #47479F; padding: 8px; border-radius: 4px; text-align: center; background: #FDFDFD;\"\u003e\n\u003cspan style=\"color: #47479f; font-size: 15px; font-weight: bold; display: block;\"\u003eS\u003c\/span\u003e\u003csmall style=\"color: #666; font-size: 10px; display: block; margin-top: 4px;\"\u003eSteel Shank Bar\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 80px; max-width: 110px; border: 1px solid #47479F; padding: 8px; border-radius: 4px; text-align: center; background: #FDFDFD;\"\u003e\n\u003cspan style=\"color: #47479f; font-size: 15px; font-weight: bold; display: block;\"\u003e20\u003c\/span\u003e\u003csmall style=\"color: #666; font-size: 10px; display: block; margin-top: 4px;\"\u003e20mm Shank Diameter\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 80px; max-width: 110px; border: 1px solid #47479F; padding: 8px; border-radius: 4px; text-align: center; background: #FDFDFD;\"\u003e\n\u003cspan style=\"color: #47479f; font-size: 15px; font-weight: bold; display: block;\"\u003eR\u003c\/span\u003e\u003csmall style=\"color: #666; font-size: 10px; display: block; margin-top: 4px;\"\u003e200mm Overall Length\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 80px; max-width: 110px; border: 1px solid #47479F; padding: 8px; border-radius: 4px; text-align: center; background: #FDFDFD;\"\u003e\n\u003cspan style=\"color: #47479f; font-size: 15px; font-weight: bold; display: block;\"\u003eS\u003c\/span\u003e\u003csmall style=\"color: #666; font-size: 10px; display: block; margin-top: 4px;\"\u003eScrew Clamping System\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 80px; max-width: 110px; border: 2px solid #28a745; padding: 8px; border-radius: 4px; text-align: center; background: #FDFDFD;\"\u003e\n\u003cspan style=\"color: #28a745; font-size: 15px; font-weight: bold; display: block;\"\u003eV\u003c\/span\u003e\u003csmall style=\"color: #333; font-size: 10px; display: block; margin-top: 4px;\"\u003e\u003cb\u003e2nd:\u003c\/b\u003e 35° Rhombic Shape\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 80px; max-width: 110px; border: 1px solid #47479F; padding: 8px; border-radius: 4px; text-align: center; background: #FDFDFD;\"\u003e\n\u003cspan style=\"color: #47479f; font-size: 15px; font-weight: bold; display: block;\"\u003eU\u003c\/span\u003e\u003csmall style=\"color: #666; font-size: 10px; display: block; margin-top: 4px;\"\u003e93° Approach Angle\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 80px; max-width: 110px; border: 1px solid #47479F; padding: 8px; border-radius: 4px; text-align: center; background: #FDFDFD;\"\u003e\n\u003cspan style=\"color: #47479f; font-size: 15px; font-weight: bold; display: block;\"\u003eB\u003c\/span\u003e\u003csmall style=\"color: #666; font-size: 10px; display: block; margin-top: 4px;\"\u003e7° Insert Back Clearance\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 80px; max-width: 110px; border: 2px solid #28a745; padding: 8px; border-radius: 4px; text-align: center; background: #FDFDFD;\"\u003e\n\u003cspan style=\"color: #28a745; font-size: 15px; font-weight: bold; display: block;\"\u003eL\u003c\/span\u003e\u003csmall style=\"color: #333; font-size: 10px; display: block; margin-top: 4px;\"\u003e\u003cb\u003eOrientation:\u003c\/b\u003e Left-Hand\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 80px; max-width: 110px; border: 1px solid #47479F; padding: 8px; border-radius: 4px; text-align: center; background: #FDFDFD;\"\u003e\n\u003cspan style=\"color: #47479f; font-size: 15px; font-weight: bold; display: block;\"\u003e16\u003c\/span\u003e\u003csmall style=\"color: #666; font-size: 10px; display: block; margin-top: 4px;\"\u003e16mm Insert Edge\u003c\/small\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 25px; -webkit-overflow-scrolling: touch;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; min-width: 600px; font-size: 13px; text-align: left; border: 1px solid #DDDDDD;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #47479f; color: #ffffff;\"\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eDimension Attributes\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eMetric System Specifications\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eImperial Equivalent Values\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD; font-weight: bold; background-color: #fdfdfd;\"\u003eModel Nomenclature\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD; color: #47479f; font-weight: bold;\"\u003eS20R-SVUBL16 (BEYOND)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eA12R-SVUBL5 (Standard Inch Style Equivalent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD; font-weight: bold;\"\u003eShank Clamping Diameter\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003e20 mm\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003e0.787 inch (Standard 3\/4\" Turret Bushing Fitment)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD; font-weight: bold; background-color: #fdfdfd;\"\u003eApproach Angle \u0026amp; Hand\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD; color: #28a745; font-weight: bold;\"\u003e93 Degrees | Left-Hand (L)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD; color: #28a745; font-weight: bold;\"\u003e93 Degrees | Left-Hand (L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD; font-weight: bold;\"\u003eOverall Tool Length\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003e200 mm\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003e7.87 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD; font-weight: bold; background-color: #fdfdfd;\"\u003eMinimum Boring Diameter (D-min)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003e25 mm\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003e0.984 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD; font-weight: bold;\"\u003ePerfectly Compatible Inserts\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD; font-weight: bold; color: #28a745;\"\u003eVBMT 1604** \/ VCGT 1604** (35° Positive)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD; font-weight: bold; color: #28a745;\"\u003eVBMT 43* Series (e.g., VBMT 431 \/ VBMT 432 Left-Config)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD; font-weight: bold; background-color: #fdfdfd;\"\u003eFastener Parts Assembly\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eM3.5 Insert Screw \/ Torx T15 Drive Wrench\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eM3.5 Insert Screw \/ Torx T15 Drive Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"color: #47479f; font-size: 15px; margin-top: 20px; margin-bottom: 12px; font-weight: 600;\"\u003eRecommended Cutting Parameters for VBMT 1604 Indexing Setup\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 25px; -webkit-overflow-scrolling: touch;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; min-width: 500px; font-size: 13px; text-align: left; border: 1px solid #DDDDDD;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #fafaff; color: #47479f;\"\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #DDDDDD; width: 40%;\"\u003eWorkpiece Material Substrates\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #DDDDDD; width: 60%;\"\u003eTarget Line Cutting Speed (Vc) \u0026amp; Feed Speed (f) Pairs\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD; font-weight: bold; background-color: #fdfdfd;\"\u003eCarbon \u0026amp; Alloy Steels (P-Class \/ e.g., 4140, 1045)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eVc: 120-220 m\/min (390-720 sfm) | f: 0.08-0.22 mm\/rev (0.003-0.009 ipr)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD; font-weight: bold;\"\u003eStainless Steel Alloys (M-Class \/ 304, 316)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eVc: 80-150 m\/min (260-490 sfm) | f: 0.06-0.16 mm\/rev (0.002-0.006 ipr)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD; font-weight: bold; background-color: #fdfdfd;\"\u003eAluminum \u0026amp; Non-Ferrous (N-Class \/ With Polished VCGT)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eVc: 200-600 m\/min (650-1960 sfm) | f: 0.05-0.25 mm\/rev (0.002-0.010 ipr)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px dashed #47479F; background-color: #fafaff; padding: 20px; border-radius: 6px; text-align: center; margin-bottom: 30px; box-sizing: border-box;\"\u003e\n\u003cp style=\"margin: 0 0 12px 0; font-size: 14px; font-weight: bold; color: #47479f;\"\u003eNeed high-performance 35-degree positive VBMT 1604 indexable carbide inserts paired with this toolholder?\u003c\/p\u003e\n\u003cspan style=\"color: #ffffff;\"\u003e\u003cspan style=\"display: inline-block; padding: 11px 22px; background-color: rgb(71, 71, 159); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; border-radius: 4px; font-size: 13px; transition: background 0.2s;\"\u003e\u003cb\u003e \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=VBMT1604\" target=\"_blank\" rel=\"noopener\"\u003eSource BEYOND VBMT1604 Inserts \u0026amp; Toolbars Here → \u003c\/a\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"color: #47479f; border-bottom: 2px solid #47479F; padding-bottom: 8px; font-size: 19px; margin-top: 30px; font-weight: bold;\"\u003e4. Industrial Application Scenarios\u003c\/h2\u003e\n\u003cul style=\"padding-left: 20px; font-size: 14px; margin-bottom: 25px; color: #444444;\"\u003e\n\u003cli style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003eLeft-Hand Sub-Spindle Machining:\u003c\/strong\u003e Ideal for multi-spindle CNC lathes where left-hand internal profiling or back-boring is executed on the sub-spindle setup.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003eIntricate Chamfering \u0026amp; Pocket Copying:\u003c\/strong\u003e The 93-degree clearance angle prevents back-end interference when cutting variable angles or deep, sweeping inner curves.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003eSmall Bore Profiling:\u003c\/strong\u003e With a minimum entry bore diameter of 25mm, this tool allows operators to perform deep profiling in tight spaces where thicker bars cannot clear.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #47479f; border-bottom: 2px solid #47479F; padding-bottom: 8px; font-size: 19px; margin-top: 30px; font-weight: bold;\"\u003e5. Equipment \u0026amp; Tool Compatibility\u003c\/h2\u003e\n\u003cul style=\"padding-left: 20px; font-size: 14px; margin-bottom: 25px; color: #444444;\"\u003e\n\u003cli style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003eLathe Turret Clamping:\u003c\/strong\u003e Drops directly into standard 20mm boring bar sleeves, split bushings, or adjustable quick-change tool blocks.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003eUniversal Insert Standard:\u003c\/strong\u003e Masterfully engineered for standard ISO\/ANSI 35-degree positive single-sided VBMT 1604** (VBMT 43*) or sharp-edged VCGT 1604** inserts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #47479f; border-bottom: 2px solid #47479F; padding-bottom: 8px; font-size: 19px; margin-top: 30px; font-weight: bold;\"\u003e6. BEYOND Proprietary Carbide Grade Matrix for VBMT\u003c\/h2\u003e\n\u003cp style=\"font-size: 14px; margin-bottom: 15px; color: #444444;\"\u003eAchieve maximum tool life by pairing your 20mm boring bar with the recommended BEYOND industrial grade:\u003c\/p\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 25px; -webkit-overflow-scrolling: touch;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; min-width: 600px; font-size: 13px; text-align: left; border: 1px solid #DDDDDD;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #47479f; color: #ffffff;\"\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eBEYOND Grade\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eCoating Technology\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eMaterial Application Intent\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eGlobal Equivalent Grade\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD; font-weight: bold; background-color: #fdfdfd;\"\u003eBY1030\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eCVD Multi-Layer TiCN + Al2O3\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eGeneral carbon and structural alloy steel internal finish-to-medium boring.\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eSandvik GC4325 \/ Korloy NC3220\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD; font-weight: bold;\"\u003eBY8020\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003ePVD High-Density Nano-AlTiN\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eStainless steel castings (304\/316) and high-temperature nickel-chrome superalloys.\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eSandvik GC1115 \/ Kennametal KC5010\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD; font-weight: bold; background-color: #fdfdfd;\"\u003eBYC25\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eUncoated Ti-Based Cermet Matrix\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eHigh-speed precision micro-boring to achieve a mirror-gloss surface finish.\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #DDDDDD;\"\u003eKyocera TN60 \/ Mitsubishi NX2525\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"color: #47479f; border-bottom: 2px solid #47479F; padding-bottom: 8px; font-size: 19px; margin-top: 30px; font-weight: bold;\"\u003e7. Why Choose BEYOND Cutting Systems\u003c\/h2\u003e\n\u003cp style=\"font-size: 14px; margin-bottom: 20px; text-align: justify; color: #444444;\"\u003eBEYOND tooling solutions are engineered for high dimensional repeatability across automated CNC manufacturing environments. Machined on advanced 5-axis production cells, our pocket tolerances guarantee drop-in center height accuracy, extending indexable insert edge life.\u003c\/p\u003e\n\u003cdiv style=\"display: block; margin-bottom: 30px;\"\u003e\n\u003cdiv style=\"border: 1px solid #47479F; border-radius: 6px; padding: 15px; background-color: #ffffff; margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"color: #ffc107; font-size: 15px; margin-bottom: 6px;\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong style=\"display: block; font-size: 13px; margin-bottom: 4px; color: #333333;\"\u003eMarcus G. — United States\u003c\/strong\u003e\n\u003cp style=\"margin: 0; font-size: 12.5px; color: #555555; text-align: justify;\"\u003e\"Finding a solid 20mm left-hand bar that fits standard VBMT 1604 inserts without breaking the bank is tough. This BEYOND bar has excellent pocket rigidity. Zero deflection lines on my inner profile passes.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #47479F; border-radius: 6px; padding: 15px; background-color: #ffffff; margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"color: #ffc107; font-size: 15px; margin-bottom: 6px;\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong style=\"display: block; font-size: 13px; margin-bottom: 4px; color: #333333;\"\u003eDieter K. — Germany\u003c\/strong\u003e\n\u003cp style=\"margin: 0; font-size: 12.5px; color: #555555; text-align: justify;\"\u003e\"Perfekte Passform für VBMT 160404 Links-Anwendungen. Der gehärtete Stahl macht einen riesigen Unterschied bei der Oberflächengüte im Vergleich zu billigeren Haltern. Sehr stabil.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #47479F; border-radius: 6px; padding: 15px; background-color: #ffffff; margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"color: #ffc107; font-size: 15px; margin-bottom: 6px;\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong style=\"display: block; font-size: 13px; margin-bottom: 4px; color: #333333;\"\u003eFabio B. — Italy\u003c\/strong\u003e\n\u003cp style=\"margin: 0; font-size: 12.5px; color: #555555; text-align: justify;\"\u003e\"Ottimo stelo sinistro. La geometria a 93 gradi lavora pulito senza vibrazioni. Spedizione rapida e imballaggio industriale accurato.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #47479F; border-radius: 6px; padding: 15px; background-color: #ffffff; margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"color: #ffc107; font-size: 15px; margin-bottom: 6px;\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong style=\"display: block; font-size: 13px; margin-bottom: 4px; color: #333333;\"\u003eKenji T. — Japan\u003c\/strong\u003e\n\u003cp style=\"margin: 0; font-size: 12.5px; color: #555555; text-align: justify;\"\u003e\"背面加工用に左勝手の20mmを購入。チップの座面精度が非常に高く、ネジ留めも確実です。ビビりも全くなく、美しい仕上がり面に大満足。\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #47479F; border-radius: 6px; padding: 15px; background-color: #ffffff; margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"color: #ffc107; font-size: 15px; margin-bottom: 6px;\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong style=\"display: block; font-size: 13px; margin-bottom: 4px; color: #333333;\"\u003eNigel P. — United Kingdom\u003c\/strong\u003e\n\u003cp style=\"margin: 0; font-size: 12.5px; color: #555555; text-align: justify;\"\u003e\"Solid black-oxide finish protects well against coolant stains. The tool matches up perfectly with standard VBMT indexable tips. Will buy again.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"color: #47479f; border-bottom: 2px solid #47479F; padding-bottom: 8px; font-size: 19px; margin-top: 30px; font-weight: bold;\"\u003e8. Technical FAQ \u0026amp; Troubleshooting Guide\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom: 25px;\"\u003e\n\u003cdiv style=\"background-color: #47479f; color: #ffffff; padding: 12px; border-radius: 6px 6px 0 0; font-weight: bold; font-size: 14px;\"\u003eQ: When should I select a Left-Hand (SVUBL) boring bar over a Right-Hand (SVUBR) version?\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #47479F; border-top: none; padding: 15px; margin-bottom: 15px; border-radius: 0 0 6px 6px; font-size: 13.5px; background-color: #fdfdfd; text-align: justify; color: #444444;\"\u003eA: Left-hand boring bars are required depending on your lathe's turret layout, spindle rotation direction (M03 vs M04), and whether you are machining on the main spindle from the back or executing sub-spindle reverse turn operations. Always cross-check your spindle rotation vector to ensure cutting forces push into the machine bed.\u003c\/div\u003e\n\u003cdiv style=\"background-color: #47479f; color: #ffffff; padding: 12px; border-radius: 6px 6px 0 0; font-weight: bold; font-size: 14px;\"\u003eQ: What is the minimum entry bore diameter for the S20R-SVUBL16?\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #47479F; border-top: none; padding: 15px; margin-bottom: 15px; border-radius: 0 0 6px 6px; font-size: 13.5px; background-color: #fdfdfd; text-align: justify; color: #444444;\"\u003eA: The minimum bore entry diameter (D-min) is \u003cstrong\u003e25mm (0.984 inches)\u003c\/strong\u003e. Running this 20mm shank inside any cavity tighter than 25mm will cause the rear clearance shoulder of the tool head to rub against the internal bore circumference, resulting in heavy chatter or premature insert failure.\u003c\/div\u003e\n\u003cdiv style=\"background-color: #47479f; color: #ffffff; padding: 12px; border-radius: 6px 6px 0 0; font-weight: bold; font-size: 14px;\"\u003eQ: How do I eliminate micro-vibrations when boring near the maximum 80mm length limit?\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #47479F; border-top: none; padding: 15px; margin-bottom: 25px; border-radius: 0 0 6px 6px; font-size: 13.5px; background-color: #fdfdfd; text-align: justify; color: #444444;\"\u003eA: If vibration occurs at long overhangs, first ensure your toolholder clamping length is at least 3x the shank diameter (60mm clamp depth). Next, decrease your nose radius (e.g., switch from a VBMT 160408 to a VBMT 160404) and slightly increase your feed rate to force the chipbreaker to snap the chip rather than rubbing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background-color: #333333; color: #ffffff; padding: 18px; border-radius: 6px; font-size: 13px; text-align: justify; line-height: 1.6;\"\u003e\n\u003cstrong\u003eMachinist Setup Tip (Workpiece Material Matrix Alignment):\u003c\/strong\u003e When deploying left-hand profiling passes with the S20R-SVUBL16, absolute precision in aligning the cutting tip center-height with the lathe spindle centerline is vital. Because 35-degree positive VBMT inserts depend entirely on the pre-machined rake angles of the toolholder head, setting the tool even 0.05mm above or below center-line alters the operational clearance to zero inside a tight 25mm bore. This misalignment forces the insert flank or the steel head to press directly against the freshly cut workpiece path, generating extreme heat, destroying surface finishes, and fracturing the carbide tip. Keep high-pressure emulsion fluid aimed directly at the pocket to flush stringy nesting chips away instantly.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43622148505772,"sku":"S20R-SVUBL16","price":21.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S20R-SVUBL16_93_degree_indexable_internal_profiling_boring_bar_left_hand_CNC_lathe_tool_holder_for_VBMT_160404_VBMT_160408_inserts.jpg?v=1779690939","url":"https:\/\/cnchome-beyond.com\/products\/s20r-svubl16-beyond-boring-bar-cnc-internal-turning-holder","provider":"CNCHome-Beyond","version":"1.0","type":"link"}