{"product_id":"dnr0008k08-internal-turning-tool-holder","title":"BEYOND DNR0008K08 Spring Steel Internal Threading Boring Bar – Right-Hand CNC Lathe Tool Holder for 08IR Inserts (Metric 8mm Shank \u0026 Inch Equivalent Standard, Insert Not Included)","description":"\u003cdiv style=\"font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; color: #333333; line-height: 1.6; max-width: 1000px; margin: 0 auto; padding: 20px; box-sizing: border-box; -webkit-user-select: text; user-select: text;\"\u003e\n\u003c!-- H1 Banner --\u003e\n\u003cdiv style=\"background-color: #47479f; color: #ffffff; padding: 30px; border-radius: 8px; text-align: center; margin-bottom: 30px;\"\u003e\n\u003ch1 style=\"margin: 0; font-size: 26px; color: #ffffff;\"\u003eBEYOND DNR0008K08 Spring Steel Internal Threading Boring Bar\u003c\/h1\u003e\n\u003cp style=\"margin: 10px 0 0; color: #ffffff; opacity: 0.95; font-size: 16px;\"\u003ePrecision Right-Hand Turning Tool Holder for 08IR Inserts | Industrial Grade CNC Lathe System\u003c\/p\u003e\n\u003cp style=\"margin: 8px 0 0; color: #ffeb3b; font-size: 13px; font-weight: bold;\"\u003e* Note: Indexable inserts shown in product images are for demonstration purposes only and are NOT included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv style=\"background-color: #ffffff; border: 1px solid #e2e8f0; border-radius: 8px; padding: 24px; margin-bottom: 20px;\"\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; margin-top: 0; border-bottom: 2px solid #47479F; padding-bottom: 8px;\"\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp style=\"background-color: #f7fafc; padding: 14px; border-left: 4px solid #47479F; margin: 16px 0; font-style: italic; color: #2d3748; font-size: 14px;\"\u003e\"Which industrial spring steel boring bar provides the optimal harmonic dampening and rigid pocket clamping required for stable internal thread profiling with 08IR inserts on CNC lathes?\"\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 14px;\"\u003eThe \u003cstrong\u003eBEYOND DNR0008K08\u003c\/strong\u003e is a professional-grade internal threading boring bar engineered for high-precision CNC lathe operations. Forged from premium alloy spring steel, this tool holder delivers exceptional structural rigidity and vibration absorption during deep-bore internal thread cutting. Designed specifically to securely seat \u003cstrong\u003e08IR indexable threading inserts\u003c\/strong\u003e, its precision-milled insert pocket and robust clamp mechanism ensure accurate flank contact, preventing micro-shift and guaranteeing superior pitch consistency across steel, stainless steel, and alloy workpieces.\u003c\/p\u003e\n\u003ch3 style=\"font-size: 16px; color: #1a202c; margin-top: 20px; margin-bottom: 12px;\"\u003eISO \/ ANSI Standard Nomenclature Breakdown: DNR0008K08\u003c\/h3\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px;\"\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 8px; border-radius: 6px; text-align: center; flex: 1; min-width: 60px; background: #f8fafc;\"\u003e\n\u003cstrong style=\"color: #47479f; display: block; font-size: 11px;\"\u003eD\u003c\/strong\u003e\u003csmall style=\"color: #4a5568; font-size: 10px;\"\u003eClamp Type\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 8px; border-radius: 6px; text-align: center; flex: 1; min-width: 60px; background: #f8fafc;\"\u003e\n\u003cstrong style=\"color: #47479f; display: block; font-size: 11px;\"\u003eN\u003c\/strong\u003e\u003csmall style=\"color: #4a5568; font-size: 10px;\"\u003eClearance 0°\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 8px; border-radius: 6px; text-align: center; flex: 1; min-width: 60px; background: #f8fafc;\"\u003e\n\u003cstrong style=\"color: #47479f; display: block; font-size: 11px;\"\u003eR\u003c\/strong\u003e\u003csmall style=\"color: #4a5568; font-size: 10px;\"\u003eRight Hand\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 8px; border-radius: 6px; text-align: center; flex: 1; min-width: 60px; background: #f8fafc;\"\u003e\n\u003cstrong style=\"color: #47479f; display: block; font-size: 11px;\"\u003e0008\u003c\/strong\u003e\u003csmall style=\"color: #4a5568; font-size: 10px;\"\u003eShank Dia (8mm)\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 8px; border-radius: 6px; text-align: center; flex: 1; min-width: 60px; background: #f8fafc;\"\u003e\n\u003cstrong style=\"color: #47479f; display: block; font-size: 11px;\"\u003eK08\u003c\/strong\u003e\u003csmall style=\"color: #4a5568; font-size: 10px;\"\u003eLength\/Seat Series\u003c\/small\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Core Advantages --\u003e\n\u003cdiv style=\"background-color: #ffffff; border: 1px solid #e2e8f0; border-radius: 8px; padding: 24px; margin-bottom: 20px;\"\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; margin-top: 0; border-bottom: 2px solid #47479F; padding-bottom: 8px;\"\u003e2. Product Core Advantages\u003c\/h2\u003e\n\u003cul style=\"margin: 0; padding-left: 20px; color: #2d3748;\"\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eSpring Steel High Dampening Core:\u003c\/strong\u003e Effectively suppresses chatter and harmonic resonance during deep internal boring and threading passes.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003ePrecision 08IR Insert Pocket:\u003c\/strong\u003e Engineered for exact positioning of 08IR threading inserts, ensuring optimal thread profile geometry and symmetry.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eRigid Top-Clamp Fixation:\u003c\/strong\u003e Delivers secure downward and lateral clamping pressure to withstand high cutting forces without insert displacement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications \u0026 Cutting Parameters --\u003e\n\u003cdiv style=\"background-color: #ffffff; border: 1px solid #e2e8f0; border-radius: 8px; padding: 24px; margin-bottom: 20px;\"\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; margin-top: 0; border-bottom: 2px solid #47479F; padding-bottom: 8px;\"\u003e3. Technical Specifications \u0026amp; Cutting Parameters\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 13px; margin-bottom: 16px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #47479f; color: #ffffff;\"\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #cbd5e0; text-align: left;\"\u003eMetric Specification (ISO\/ANSI)\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #cbd5e0; text-align: left;\"\u003eImperial Approximation\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #cbd5e0;\"\u003eShank Diameter: Metric 8mm Designation\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #cbd5e0;\"\u003e~0.315\" Inch Shank\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8fafc;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #cbd5e0;\"\u003eHand Orientation: Right-Hand (R) Turning\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #cbd5e0;\"\u003eRight-Hand Tooling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #cbd5e0;\"\u003eCompatible Insert Style: 08IR (Internal Right)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #cbd5e0;\"\u003e08 Series Internal Threading\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8fafc;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #cbd5e0;\"\u003eShank Material: Forged Spring Steel\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #cbd5e0;\"\u003eHigh-Dampening Alloy Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"font-size: 16px; color: #1a202c; margin-top: 16px; margin-bottom: 8px;\"\u003eRecommended Cutting Parameters for Internal Threading\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 13px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #e2e8f0; color: #1a202c;\"\u003e\n\u003cth style=\"padding: 8px; border: 1px solid #cbd5e0; text-align: left;\"\u003eWorkpiece Material Group\u003c\/th\u003e\n\u003cth style=\"padding: 8px; border: 1px solid #cbd5e0; text-align: left;\"\u003eCutting Speed Vc (m\/min)\u003c\/th\u003e\n\u003cth style=\"padding: 8px; border: 1px solid #cbd5e0; text-align: left;\"\u003eInfeed per Pass (Multi-Pass Threading)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #cbd5e0;\"\u003eCarbon \u0026amp; Alloy Steel (ISO P)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #cbd5e0;\"\u003e120 - 220 m\/min\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #cbd5e0;\"\u003e0.04 - 0.12 mm\/pass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8fafc;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #cbd5e0;\"\u003eStainless Steel (ISO M)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #cbd5e0;\"\u003e80 - 150 m\/min\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #cbd5e0;\"\u003e0.03 - 0.10 mm\/pass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"border: 2px dashed #47479F; border-radius: 8px; padding: 20px; text-align: center; background-color: #ffffff; margin-top: 20px;\"\u003e\n\u003cp style=\"margin: 0 0 12px 0; font-size: 16px; color: #47479f; font-weight: bold;\"\u003eExplore Compatible Lathe Tool Holder Systems\u003c\/p\u003e\n\u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=08IR\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan style=\"color: #ffffff;\"\u003e\u003cspan style=\"display: inline-block; background-color: rgb(71, 71, 159); padding: 12px 24px; border-radius: 6px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e[View BEYOND Turning Tool Holder Collection] →\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Applications --\u003e\n\u003cdiv style=\"background-color: #ffffff; border: 1px solid #e2e8f0; border-radius: 8px; padding: 24px; margin-bottom: 20px;\"\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; margin-top: 0; border-bottom: 2px solid #47479F; padding-bottom: 8px;\"\u003e4. Product Applications\u003c\/h2\u003e\n\u003cp style=\"margin: 0;\"\u003eDesigned for micro-internal thread cutting operations on CNC lathes and turning centers, including miniature metric, unified (UN), and fine-pitch internal threads across miniature mechanical components, medical instrumentation, and precision fittings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv style=\"background-color: #ffffff; border: 1px solid #e2e8f0; border-radius: 8px; padding: 24px; margin-bottom: 20px;\"\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; margin-top: 0; border-bottom: 2px solid #47479F; padding-bottom: 8px;\"\u003e5. Equipment \u0026amp; Accessory Compatibility\u003c\/h2\u003e\n\u003cp style=\"margin: 0;\"\u003eCompatible with micro CNC boring bar sleeves, lathe turret clamping blocks, and all ISO-compliant 08IR internal threading carbide inserts (inserts sold separately).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material Comparison \u0026 Workpiece Material Matrix --\u003e\n\u003cdiv style=\"background-color: #ffffff; border: 1px solid #e2e8f0; border-radius: 8px; padding: 24px; margin-bottom: 20px;\"\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; margin-top: 0; border-bottom: 2px solid #47479F; padding-bottom: 8px;\"\u003e6. Material Comparison \u0026amp; Workpiece Matrix\u003c\/h2\u003e\n\u003cp style=\"margin-bottom: 12px;\"\u003e\u003cstrong\u003eSpring Steel vs. Standard Carbon Steel Shanks:\u003c\/strong\u003e Spring steel provides superior elasticity and vibration damping, reducing deflection during delicate internal machining passes.\u003c\/p\u003e\n\u003cul style=\"margin: 0; padding-left: 20px; color: #2d3748; font-size: 13px;\"\u003e\n\u003cli style=\"margin-bottom: 6px;\"\u003e\n\u003cstrong\u003eISO P (Steel):\u003c\/strong\u003e Excellent stability for micro-internal thread cutting on carbon steels.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 6px;\"\u003e\n\u003cstrong\u003eISO M (Stainless Steel):\u003c\/strong\u003e Rigid clamping minimizes chatter in delicate stainless steel workpieces.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 6px;\"\u003e\n\u003cstrong\u003eISO K (Cast Iron):\u003c\/strong\u003e Absorbs micro-cutting shock during small-bore internal profiling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us --\u003e\n\u003cdiv style=\"border: 2px solid #47479F; border-radius: 8px; padding: 24px; margin-bottom: 20px; background-color: #fcfcfc;\"\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; text-align: center; margin-top: 0;\"\u003e7. Why Choose BEYOND Precision Tooling\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-top: 16px;\"\u003e\n\u003cdiv style=\"text-align: center; padding: 12px; background: #ffffff; border: 1px solid #e2e8f0; border-radius: 6px;\"\u003e\n\u003cstrong\u003eStrict ISO Standards\u003c\/strong\u003e\u003cbr\u003e\u003csmall style=\"color: #4a5568;\"\u003eManufactured to exact international tooling tolerances.\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center; padding: 12px; background: #ffffff; border: 1px solid #e2e8f0; border-radius: 6px;\"\u003e\n\u003cstrong\u003eIndustrial Durability\u003c\/strong\u003e\u003cbr\u003e\u003csmall style=\"color: #4a5568;\"\u003eHigh-tensile spring steel built for rigorous production duty.\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center; padding: 12px; background: #ffffff; border: 1px solid #e2e8f0; border-radius: 6px;\"\u003e\n\u003cstrong\u003eExpert Engineering Support\u003c\/strong\u003e\u003cbr\u003e\u003csmall style=\"color: #4a5568;\"\u003eDirect technical guidance for CNC turning optimization.\u003c\/small\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ \u0026 Troubleshooting --\u003e\n\u003cdiv style=\"background-color: #1a1a2e; color: #ffffff; padding: 24px; border-radius: 8px; margin-bottom: 20px;\"\u003e\n\u003ch2 style=\"color: #ffffff; font-size: 20px; margin-top: 0; border-bottom: 1px solid #47479F; padding-bottom: 8px;\"\u003e8. AI-Style FAQ \u0026amp; Troubleshooting\u003c\/h2\u003e\n\u003cp style=\"margin-bottom: 12px;\"\u003e\u003cstrong\u003eQ: Do threading inserts come included with the DNR0008K08 boring bar?\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color: #cbd5e0; font-size: 13px;\"\u003eA: No. The product package includes the boring bar and clamping hardware only; 08IR inserts must be purchased separately.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 12px;\"\u003e\u003cstrong\u003eQ: How does spring steel improve internal threading performance compared to standard steel?\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color: #cbd5e0; font-size: 13px;\"\u003eA: Spring steel provides enhanced vibration damping, significantly reducing chatter and tool deflection during micro-bore threading operations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin: 0;\"\u003e\u003cstrong\u003eTroubleshooting Tip:\u003c\/strong\u003e If thread surface finish degradation or chatter occurs, verify that the boring bar overhang does not exceed 4x the shank diameter, and ensure the 08IR insert is securely torqued in the pocket.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Grade Comparison, Equivalent Models \u0026 Material Tips --\u003e\n\u003cdiv style=\"background-color: #ffffff; border: 1px solid #e2e8f0; border-radius: 8px; padding: 24px; margin-bottom: 20px; font-size: 13px;\"\u003e\n\u003ch3 style=\"color: #47479f; font-size: 16px; margin-top: 0;\"\u003eTechnical Reference \u0026amp; Material Comparison Tips\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 8px;\"\u003e\u003cstrong\u003eGrade Comparison:\u003c\/strong\u003e BEYOND spring steel boring bars offer superior rigidity and fatigue resistance over conventional carbon steel holders, extending tool life in continuous production.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8px;\"\u003e\u003cstrong\u003eEquivalent Models:\u003c\/strong\u003e Conforms to universal ISO and ANSI turning tool holder designation standards for direct interchangeability.\u003c\/p\u003e\n\u003cp style=\"margin: 0;\"\u003e\u003cstrong\u003eMaintenance Tip:\u003c\/strong\u003e Keep the insert seat clean of chips and debris before clamping new inserts to maintain precise positioning accuracy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Footer Endorsement --\u003e\n\u003cdiv style=\"margin-top: 24px; font-size: 11px; color: #718096; text-align: center; border-top: 1px solid #e2e8f0; padding-top: 16px;\"\u003eManufactured in compliance with ISO 9001 quality management systems and ISO 5608 turning tool holding standards. Performance metrics verified via standardized CNC machining operational datasets.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43675424948396,"sku":"DNR0008K08","price":14.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_DNR0008K08_spring_steel_internal_threading_boring_bar_side_profile.jpg?v=1786778181","url":"https:\/\/cnchome-beyond.com\/products\/dnr0008k08-internal-turning-tool-holder","provider":"CNCHome-Beyond","version":"1.0","type":"link"}