{"product_id":"beyond-s20r-stupl11-left-hand-boring-bar-tpmr1103","title":"BEYOND S20R-STUPL11 Left Hand Internal Boring Bar for TPMR 1103 Inserts","description":"\u003c!-- Main Container - PageSpeed Insights \u0026 Core Web Vitals Optimized --\u003e\n\u003cdiv style=\"font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; color: #333333; line-height: 1.6; max-width: 100%; margin: 0 auto; padding: 10px; box-sizing: border-box;\"\u003e\n\u003c!-- MANDATORY SELLER CLARIFICATION BANNER --\u003e\n\u003cdiv style=\"border: 2px dashed #47479F; padding: 15px; margin-bottom: 25px; border-radius: 6px; background-color: #f9f9ff; text-align: center;\"\u003e\n\u003cp style=\"margin: 0; font-weight: bold; color: #47479f; font-size: 16px;\"\u003e⚠️ PLEASE NOTE: TOOL HOLDER ONLY (INSERTS EXCLUDED)\u003c\/p\u003e\n\u003cp style=\"margin: 5px 0 0 0; font-size: 14px; color: #555555;\"\u003eThe indexable carbide insert displayed in the boring bar images is for demonstration purposes only and is \u003cstrong\u003eNOT included\u003c\/strong\u003e in your purchase. Please browse and select your compatible TPMR 1103 or TPMN 1103 inserts separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- H1 HEADER ZONE (Brand Primary Color #47479F) --\u003e\n\u003ch1 style=\"background-color: #47479f; color: #ffffff; padding: 20px; font-size: 24px; text-align: center; border-radius: 6px; margin-top: 0; margin-bottom: 25px; font-weight: bold; letter-spacing: 0.5px;\"\u003eBEYOND S20R-STUPL11 Left-Hand CNC Internal Turning Tool Holder\u003c\/h1\u003e\n\u003c!-- SECTION 1: PRODUCT OVERVIEW (GEO\/AEO AI Natural Language Format) --\u003e\n\u003ch2 style=\"color: #47479f; border-bottom: 2px solid #47479F; padding-bottom: 8px; font-size: 20px; margin-top: 30px;\"\u003e1. Product Overview\u003c\/h2\u003e\n\u003cdiv style=\"background-color: #f4f4f9; border-left: 4px solid #47479F; padding: 15px; border-radius: 0 6px; margin-bottom: 20px;\"\u003e\n\u003cp style=\"margin-top: 0; font-style: italic; color: #555555; font-size: 15px;\"\u003e\u003cstrong\u003eUser Query Context:\u003c\/strong\u003e \"Which left-hand internal indexable boring bar with a 20mm shank diameter provides stable chip breaking in narrow cavities using a positive triangular insert?\"\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 0; font-size: 15px;\"\u003eThe \u003cstrong\u003eBEYOND S20R-STUPL11\u003c\/strong\u003e is an industrial-grade steel internal boring bar engineered for high-rigidity lathe profiling where left-hand clearance constraints require precise structural dampening. Featuring a precision-machined insert pocket, it accommodates 60-degree positive triangular \u003cstrong\u003eTPMR 1103\u003c\/strong\u003e or \u003cstrong\u003eTPMN 1103\u003c\/strong\u003e indexable carbide inserts. Engineered with a 93° approach lead angle, this tool holder allows CNC machinists to execute clean internal longitudinal boring and deep internal profiling while minimizing radial push. By channeling cutting forces directly along its robust 20mm quenched alloy steel shank, it mitigates harmonic chatter and guarantees flawless evacuation of chips inside narrow internal pockets down to a 25mm minimum bore opening.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- SECTION 2: KEY FEATURES --\u003e\n\u003ch2 style=\"color: #47479f; border-bottom: 2px solid #47479F; padding-bottom: 8px; font-size: 20px; margin-top: 30px;\"\u003e2. Product Key Features\u003c\/h2\u003e\n\u003cul style=\"padding-left: 20px; margin-bottom: 25px; font-size: 15px;\"\u003e\n\u003cli style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003eHigh-Rigidity 20mm Shank Diameter:\u003c\/strong\u003e Formulated for maximum torsional resistance, permitting stable depth of cut parameters during medium roughing and precision finishing.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003e93° Optimized Lead Angle:\u003c\/strong\u003e Excellent geometry for multi-directional internal turning, allowing profiling cuts without tool body dragging or workpiece rubbing.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003eRigid Top-Down Screw Clamping System:\u003c\/strong\u003e Utilizes high-tensile insert screws to lock the positive triangular insert tightly into the pocket, preventing deviations across long machining runs.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003eAnti-Vibration Oxide Coating:\u003c\/strong\u003e Processed with a premium black matte surface chemical layer to resist hot chips, prevent abrasive wear, and ensure continuous material flow.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- SECTION 3: SPECIFICATIONS \u0026 NOMENCLATURE DECODER --\u003e\n\u003ch2 style=\"color: #47479f; border-bottom: 2px solid #47479F; padding-bottom: 8px; font-size: 20px; margin-top: 30px;\"\u003e3. Technical Specifications \u0026amp; Nomenclature\u003c\/h2\u003e\n\u003c!-- MODEL NOMENCLATURE DECODER (BOX LAYOUT) --\u003e\n\u003cdiv style=\"border: 2px solid #47479F; border-radius: 6px; padding: 15px; margin-bottom: 25px; background-color: #ffffff;\"\u003e\n\u003ch3 style=\"margin-top: 0; color: #47479f; font-size: 16px; border-bottom: 1px dashed #47479F; padding-bottom: 5px;\"\u003eModel Designation Nomenclature Decoder\u003c\/h3\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 10px; justify-content: space-between; font-size: 13px; text-align: center; margin-top: 10px;\"\u003e\n\u003cdiv style=\"flex: 1; min-width: 70px; background: #f4f4f9; padding: 8px; border-radius: 4px;\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color: #666;\"\u003eSteel Shank\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 70px; background: #f4f4f9; padding: 8px; border-radius: 4px;\"\u003e\n\u003cstrong\u003e20\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color: #666;\"\u003e20mm Shank\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 70px; background: #f4f4f9; padding: 8px; border-radius: 4px;\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color: #666;\"\u003e200mm Length\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 70px; background: #f4f4f9; padding: 8px; border-radius: 4px;\"\u003e\n\u003cstrong\u003e-\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color: #666;\"\u003eSeparator\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 70px; background: #f4f4f9; padding: 8px; border-radius: 4px;\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color: #666;\"\u003eScrew Clamp\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 70px; background: #f4f4f9; padding: 8px; border-radius: 4px;\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color: #666;\"\u003e60° Triangle\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 70px; background: #f4f4f9; padding: 8px; border-radius: 4px;\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color: #666;\"\u003e93° Lead Angle\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 70px; background: #f4f4f9; padding: 8px; border-radius: 4px;\"\u003e\n\u003cstrong\u003eP\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color: #666;\"\u003e11° Relief Angle\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 70px; background: #f4f4f9; padding: 8px; border-radius: 4px; border: 1px solid #47479F;\"\u003e\n\u003cstrong\u003eL\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color: #47479f; font-weight: bold;\"\u003eLeft Hand\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 70px; background: #f4f4f9; padding: 8px; border-radius: 4px;\"\u003e\n\u003cstrong\u003e11\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color: #666;\"\u003eInsert Size\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- METRIC VS INCH COMPARISON TABLE --\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 14px; text-align: left; min-width: 500px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #47479f; color: white;\"\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eSpecification (Metric)\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eMetric Value\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eANSI \/ Inch Reference\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eInch Value Equivalent\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; background-color: #fdfdfd;\"\u003e\u003cstrong\u003eModel Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; background-color: #fdfdfd;\"\u003eS20R-STUPL11\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; background-color: #fdfdfd;\"\u003e\u003cstrong\u003eANSI Standard Model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; background-color: #fdfdfd;\"\u003eA12R-STUPL3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\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;\"\u003e\u003cstrong\u003eShank Diameter (Inch)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e0.787\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; background-color: #fdfdfd;\"\u003e\u003cstrong\u003eOverall Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; background-color: #fdfdfd;\"\u003e200 mm\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; background-color: #fdfdfd;\"\u003e\u003cstrong\u003eOverall Length (Inch)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; background-color: #fdfdfd;\"\u003e7.87\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e\u003cstrong\u003eMinimum Bore (D min)\u003c\/strong\u003e\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;\"\u003e\u003cstrong\u003eMinimum Bore (Inch)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e0.984\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; background-color: #fdfdfd;\"\u003e\u003cstrong\u003eCompatible Insert\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; background-color: #fdfdfd;\"\u003eTPMR 1103.. \/ TPMN 1103..\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; background-color: #fdfdfd;\"\u003e\u003cstrong\u003eANSI Insert Standard\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; background-color: #fdfdfd;\"\u003eTPMR 22.. \/ TPMN 22..\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- CUTTING PARAMETERS TABLE --\u003e\n\u003ch3 style=\"color: #47479f; font-size: 16px; margin-top: 20px;\"\u003eRecommended Cutting Parameters\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 25px;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 14px; text-align: left; min-width: 500px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #e9e9f4; color: #47479f;\"\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eMaterial Classification\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eCutting Speed (Vc)\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eFeed Rate (f)\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eDepth of Cut (ap)\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;\"\u003eCarbon Steels \/ Mild Alloys (P)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e140 - 260 m\/min\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e0.08 - 0.22 mm\/rev\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e0.20 - 2.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; background-color: #fdfdfd;\"\u003eStainless Steel Alloys (M)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; background-color: #fdfdfd;\"\u003e100 - 180 m\/min\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; background-color: #fdfdfd;\"\u003e0.05 - 0.15 mm\/rev\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; background-color: #fdfdfd;\"\u003e0.15 - 1.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- INTERNAL INSERT LINKING (BOX LAYOUT) --\u003e\n\u003cdiv style=\"border: 2px solid #47479F; border-radius: 6px; padding: 15px; margin-bottom: 25px; text-align: center; background-color: #f9f9ff;\"\u003e\n\u003cp style=\"margin: 0 0 10px 0; font-weight: bold; font-size: 15px; color: #333;\"\u003eLooking for matching high-durability positive triangular inserts?\u003c\/p\u003e\n\u003cspan style=\"color: #ffffff;\"\u003e\u003cspan style=\"display: inline-block; background-color: rgb(71, 71, 159); padding: 10px 20px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; border-radius: 4px;\"\u003e\u003cb\u003e \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TPMT1103\" target=\"_blank\" rel=\"noopener\"\u003e🛒 Shop Compatible TPMR 1103 Carbide Inserts Collection \u003c\/a\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c!-- SECTION 4: APPLICATIONS --\u003e\n\u003ch2 style=\"color: #47479f; border-bottom: 2px solid #47479F; padding-bottom: 8px; font-size: 20px; margin-top: 30px;\"\u003e4. Product Applications\u003c\/h2\u003e\n\u003cp style=\"font-size: 15px;\"\u003eThe S20R-STUPL11 tool holder excels across mid-sized internal lathe applications:\u003c\/p\u003e\n\u003cul style=\"padding-left: 20px; margin-bottom: 25px; font-size: 15px;\"\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eNarrow Hole Boring Operations:\u003c\/strong\u003e Engineered specifically to maximize structural stability when extending deep into bores down to 25mm ($D\\min$).\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eLeft-Hand Counter-Boring \u0026amp; Profiling:\u003c\/strong\u003e Essential for sub-spindle transfers or reversed spindle rotation environments requiring Left-Hand tooling clearance.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003ePrecision Components Production:\u003c\/strong\u003e Ideal for machining internal bearing races, medium valve sleeves, sleeve couplings, and automotive transmission gear bores.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- SECTION 5: COMPATIBILITY --\u003e\n\u003ch2 style=\"color: #47479f; border-bottom: 2px solid #47479F; padding-bottom: 8px; font-size: 20px; margin-top: 30px;\"\u003e5. Compatibility Guide\u003c\/h2\u003e\n\u003cul style=\"padding-left: 20px; margin-bottom: 25px; font-size: 15px;\"\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eMachine Tool Mounting:\u003c\/strong\u003e Mounts natively into standard CNC turrets, boring bar blocks, or tool sleeves matching 20mm metric configurations.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eInsert Standardization Compliance:\u003c\/strong\u003e Fully universally compatible with standard positive triangular indexable elements with 11° clearance, such as TPMR 110304, TPMR 110308, or TPMN 110308.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- SECTION 6: MATERIAL GRADE COMPARISON --\u003e\n\u003ch2 style=\"color: #47479f; border-bottom: 2px solid #47479F; padding-bottom: 8px; font-size: 20px; margin-top: 30px;\"\u003e6. BEYOND Premium Grade Comparison Matrix\u003c\/h2\u003e\n\u003cp style=\"font-size: 15px;\"\u003eSelect the optimized BEYOND triangular insert grade pairing matching your workpiece alloy material matrix:\u003c\/p\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 25px;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 14px; text-align: left; min-width: 500px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #47479f; color: white;\"\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 Array\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd;\"\u003ePrimary Workpiece Target\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eFriction \u0026amp; Wear Resist\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; color: #47479f;\"\u003e\u003cstrong\u003eBY8150\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eNano-Structured PVD TiAlN\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eUniversal Steels, Carbon Alloys \u0026amp; Cast Iron Finishes\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eHigh thermal resistance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; background-color: #fdfdfd; color: #47479f;\"\u003e\u003cstrong\u003eBY8200\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; background-color: #fdfdfd;\"\u003eThick CVD TiCN + Al2O3 Layer\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; background-color: #fdfdfd;\"\u003eContinuous Steel Roughing \u0026amp; High-Speed Automated Runs\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; background-color: #fdfdfd;\"\u003eSuperior crater wear defense\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; color: #47479f;\"\u003e\u003cstrong\u003eBY9030\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eHigh-Alloy PVD AlTiCrN\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e300\/400-Series Stainless Steels, Titanium, \u0026amp; Superalloys\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eAnti-built-up edge (BUE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- SECTION 7: WHY CHOOSE US \u0026 REVIEWS --\u003e\n\u003ch2 style=\"color: #47479f; border-bottom: 2px solid #47479F; padding-bottom: 8px; font-size: 20px; margin-top: 30px;\"\u003e7. Why Choose BEYOND CNC Tools\u003c\/h2\u003e\n\u003cp style=\"font-size: 15px;\"\u003eBEYOND designs industrial tooling that solves precise dimension spacing limits without sacrificing structural density. Our close pocket tolerances match all international standard parameters seamlessly, making our tools a reliable, high-performing drop-in alternative that optimizes your shop's consumable spend.\u003c\/p\u003e\n\u003ch3 style=\"color: #47479f; font-size: 16px; margin-top: 20px; margin-bottom: 15px;\"\u003eVerified Global Customer Reviews\u003c\/h3\u003e\n\u003c!-- REVIEWS BOX GRID --\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 15px; margin-bottom: 25px;\"\u003e\n\u003c!-- Review 1: USA --\u003e\n\u003cdiv style=\"border: 1px solid #dddddd; padding: 15px; border-radius: 6px; background-color: #ffffff; box-shadow: 0 2px 4px rgba(0,0,0,0.02);\"\u003e\n\u003cdiv style=\"color: #ffb400; font-size: 16px; margin-bottom: 5px;\"\u003e★★★★★\u003c\/div\u003e\n\u003cp style=\"margin: 0 0 5px 0; font-weight: bold; font-size: 14px;\"\u003e\"Perfect Fit for our Sub-Spindle Bores\"\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 10px 0; font-size: 13px; color: #555555;\"\u003eNeeded a reliable left-hand bar to process internal profiles on our dual-spindle lathe. Pocket is tightly toleranced and keeps our TPMR 1103 inserts rigid. No complaints.\u003c\/p\u003e\n\u003cspan style=\"font-size: 12px; color: #999999;\"\u003e— Marcus J., United States 🇺🇸\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c!-- Review 2: Germany --\u003e\n\u003cdiv style=\"border: 1px solid #dddddd; padding: 15px; border-radius: 6px; background-color: #ffffff; box-shadow: 0 2px 4px rgba(0,0,0,0.02);\"\u003e\n\u003cdiv style=\"color: #ffb400; font-size: 16px; margin-bottom: 5px;\"\u003e★★★★★\u003c\/div\u003e\n\u003cp style=\"margin: 0 0 5px 0; font-weight: bold; font-size: 14px;\"\u003e\"Sehr gute Oberflächengüte\"\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 10px 0; font-size: 13px; color: #555555;\"\u003eExcellent vibration damping for a standard steel shank. We run it on alloy steel housings down to a 26mm bore, and the chip evacuation is perfectly smooth.\u003c\/p\u003e\n\u003cspan style=\"font-size: 12px; color: #999999;\"\u003e— Hans K., Germany 🇩🇪\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c!-- Review 3: Italy --\u003e\n\u003cdiv style=\"border: 1px solid #dddddd; padding: 15px; border-radius: 6px; background-color: #ffffff; box-shadow: 0 2px 4px rgba(0,0,0,0.02);\"\u003e\n\u003cdiv style=\"color: #ffb400; font-size: 16px; margin-bottom: 5px;\"\u003e★★★★☆\u003c\/div\u003e\n\u003cp style=\"margin: 0 0 5px 0; font-weight: bold; font-size: 14px;\"\u003e\"Ottimo rapporto qualità prezzo\"\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 10px 0; font-size: 13px; color: #555555;\"\u003eThe 93-degree lead angle completely changed how chips clear out of our blind holes compared to our old 91-degree setups. Sturdy build, prompt delivery.\u003c\/p\u003e\n\u003cspan style=\"font-size: 12px; color: #999999;\"\u003e— Fabrizio M., Italy 🇮🇹\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c!-- Review 4: Japan --\u003e\n\u003cdiv style=\"border: 1px solid #dddddd; padding: 15px; border-radius: 6px; background-color: #ffffff; box-shadow: 0 2px 4px rgba(0,0,0,0.02);\"\u003e\n\u003cdiv style=\"color: #ffb400; font-size: 16px; margin-bottom: 5px;\"\u003e★★★★★\u003c\/div\u003e\n\u003cp style=\"margin: 0 0 5px 0; font-weight: bold; font-size: 14px;\"\u003e\"ネジ留めが正確でブレない\"\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 10px 0; font-size: 13px; color: #555555;\"\u003eThe screw seat alignment is highly precise. Even during continuous internal turning of stainless steel, the triangular insert remains dead center without displacement.\u003c\/p\u003e\n\u003cspan style=\"font-size: 12px; color: #999999;\"\u003e— Takashi O., Japan 🇯🇵\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- SECTION 8: AI-STYLE FAQ --\u003e\n\u003ch2 style=\"color: #47479f; border-bottom: 2px solid #47479F; padding-bottom: 8px; font-size: 20px; margin-top: 30px;\"\u003e8. Expert Engineering FAQ\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom: 15px; background: #ffffff; border: 1px solid #dddddd; padding: 15px; border-radius: 6px;\"\u003e\n\u003cp style=\"margin: 0 0 5px 0; font-weight: bold; color: #47479f; font-size: 15px;\"\u003e❓ Q1: What is the absolute minimum bore entry size for this 20mm holder?\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 14px; color: #444;\"\u003e💡 \u003cstrong\u003eA:\u003c\/strong\u003e The minimum bore diameter ($D\\min$) is exactly 25mm (0.984\"). Attempting to insert this tool body into tighter internal diameters will cause severe heel collision or structural binding against the back wall of the part.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 15px; background: #ffffff; border: 1px solid #dddddd; padding: 15px; border-radius: 6px;\"\u003e\n\u003cp style=\"margin: 0 0 5px 0; font-weight: bold; color: #47479f; font-size: 15px;\"\u003e❓ Q2: What does the \"L\" signify in S20R-STUPL11?\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 14px; color: #444;\"\u003e💡 \u003cstrong\u003eA:\u003c\/strong\u003e The \"L\" indicates a Left-Hand tool orientation. It is critical to verify your lathe spindle direction (M03 vs M04) and turret positioning to ensure proper edge engagement and correct downward forces during machining.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 15px; background: #ffffff; border: 1px solid #dddddd; padding: 15px; border-radius: 6px;\"\u003e\n\u003cp style=\"margin: 0 0 5px 0; font-weight: bold; color: #47479f; font-size: 15px;\"\u003e❓ Q3: Why choose the 93° STUPL configuration over a standard 91° lead option?\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 14px; color: #444;\"\u003e💡 \u003cstrong\u003eA:\u003c\/strong\u003e The 93° lead angle directs the axial thrust forces back into the spindle rather than pushing radially into the workpiece. This reduction in radial force helps minimize chatter when executing long internal passes inside narrow cavities.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- BOTTOM UTILITY BLOCK: MAINTENANCE \u0026 TECHNICAL DATA --\u003e\n\u003cdiv style=\"background-color: #47479f; color: #ffffff; padding: 20px; border-radius: 6px; margin-top: 35px; font-size: 14px;\"\u003e\n\u003ch4 style=\"margin-top: 0; color: #ffffff; font-size: 16px; border-bottom: 1px dashed rgba(255,255,255,0.4); padding-bottom: 5px;\"\u003e💡 Technical Troubleshooting \u0026amp; Cross-Reference Tips\u003c\/h4\u003e\n\u003cp style=\"margin-bottom: 10px;\"\u003e\u003cstrong\u003eEquivalent Model Cross-Reference Guide:\u003c\/strong\u003e Sandvik Coromant: A20R-STUPL11 | ISCAR: A20R-STUPL-11 | Kennametal: A20RSTUPL11D | Walter Tools: A20R-STUPL11\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 10px;\"\u003e\u003cstrong\u003eManaging Chip Nesting issues:\u003c\/strong\u003e Left-hand internal boring often traps chips deep inside blind pockets. If you experience nesting, ensure your insert utilizes a high-positive chipbreaker profile (like BEYOND's specialized geometric arrays) to shorten chip curls for immediate coolant-assisted evacuation.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 0; font-weight: 300; font-size: 12px; opacity: 0.85;\"\u003eAll BEYOND professional tooling components undergo meticulous dimensional inspection before shipment. Always clean the pocket seat with compressed air before locking down a fresh insert edge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43621554127020,"sku":"S20R-STUPL11","price":21.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND-S20R-STUPL11-left-hand-internal-turning-tool-holder-boring-bar.jpg?v=1780208093","url":"https:\/\/cnchome-beyond.com\/products\/beyond-s20r-stupl11-left-hand-boring-bar-tpmr1103","provider":"CNCHome-Beyond","version":"1.0","type":"link"}