{"product_id":"s18q-stupr11-boring-bar-18mm-cnc-internal-turning-tool-holder","title":"BEYOND S18Q-STUPR11 Internal Turning Tool Holder | 18mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 20px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    background-color: #fcfcfd;\n  }\n  .beyond-code-breakdown {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-code-letter {\n    border: 1px solid #47479F;\n    border-radius: 4px;\n    padding: 10px;\n    flex: 1 1 140px;\n    background-color: #ffffff;\n    text-align: center;\n  }\n  .beyond-code-letter strong {\n    color: #47479F;\n    font-size: 18px;\n    display: block;\n    border-bottom: 1px solid #e0e0e0;\n    padding-bottom: 5px;\n    margin-bottom: 5px;\n  }\n  .beyond-table-wrapper {\n    width: 100%;\n    overflow-x: auto;\n    margin: 15px 0;\n  }\n  .beyond-table {\n    width: 100%;\n    border-collapse: collapse;\n    min-width: 500px;\n  }\n  .beyond-table th, .beyond-table td {\n    border: 1px solid #dddddd;\n    padding: 12px;\n    text-align: left;\n  }\n  .beyond-table th {\n    background-color: #47479F;\n    color: white;\n  }\n  .beyond-table tr:nth-child(even) {\n    background-color: #f8f9fa;\n  }\n  .beyond-link-box {\n    border: 2px dashed #47479F;\n    background-color: #f4f4fa;\n    padding: 15px;\n    border-radius: 6px;\n    text-align: center;\n    margin: 20px 0;\n  }\n  .beyond-link-box a {\n    color: #47479F;\n    font-weight: bold;\n    text-decoration: underline;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 5px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S18Q-STUPR11 Internal Turning Tool Holder – High-Rigidity CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the package. Please purchase compatible inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which internal boring bar configuration guarantees chatter-free machining inside a tight 22mm minimum bore diameter?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S18Q-STUPR11\u003c\/strong\u003e is a premium-grade, steel-shank internal turning tool holder engineered for high-precision lathe boring operations. Designed specifically for demanding industrial environments, this tool holder incorporates a specialized 93-degree approach angle to facilitate excellent chip evacuation and lower radial cutting forces. Optimized for \u003cstrong\u003eTPMT 1103\u003c\/strong\u003e indexable carbide inserts, it allows operators to harness positive rake chipbreaker geometries (such as HQ for finishing or HM for medium machining) to effortlessly slice through alloy steels, stainless steel, and high-temperature matrix alloys without work hardening.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium Alloy Steel Core:\u003c\/strong\u003e Hardened structural steel body significantly dampens harmonics and prevents tool deflection during medium-overhang internal profiling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStreamlined Screw-Down Clamping:\u003c\/strong\u003e The low-profile screw-lock mechanism ensures maximum chip clearance space inside narrow bores, preventing re-cutting of chips.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Engineered 93° Lead Angle:\u003c\/strong\u003e Optimized for facing and blind-hole step boring, ensuring a crisp square shoulder profile.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Matte Finish:\u003c\/strong\u003e Enhanced corrosion resistance and exceptional wear life when continuously exposed to high-pressure synthetic water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Guide\u003c\/h2\u003e\n\u003cp\u003eUnderstanding the exact engineering tolerances of your CNC tooling setup is essential for toolpath precision. Below is the precise breakdown of the \u003cstrong\u003eS18Q-STUPR11\u003c\/strong\u003e nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Parsing Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e18\u003c\/strong\u003e18mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eQ\u003c\/strong\u003e180mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eP\u003c\/strong\u003e11° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003eRight-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e11\u003c\/strong\u003e11mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Attribute\u003c\/th\u003e\n\u003cth\u003eMetric System Measurement\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Conversion\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18 mm\u003c\/td\u003e\n\u003ctd\u003e0.7087 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e180 mm\u003c\/td\u003e\n\u003ctd\u003e7.086 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e22 mm\u003c\/td\u003e\n\u003ctd\u003e0.866 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTPMT 1103 \/ TPMH 1103\u003c\/td\u003e\n\u003ctd\u003eTPMT 2.21 \/ TPMT 2.22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 6.5\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 0.25 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Wrench Driver Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT8\u003c\/td\u003e\n\u003ctd\u003eT8 Driver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Type\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e120 - 220 m\/min (390 - 720 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.22 mm\/rev (0.003 - 0.009 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 420)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.06 - 0.18 mm\/rev (0.002 - 0.007 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron (GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e100 - 180 m\/min (328 - 590 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.25 mm\/rev (0.004 - 0.010 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv class=\"beyond-link-box\"\u003e🔗 Need matching high-performance inserts? \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TPMT1103\" target=\"_blank\" rel=\"noopener\"\u003eClick here to shop BEYOND Original TPMT 110304 \/ TPMT 110308 Carbide Inserts\u003c\/a\u003e with optimized chipbreaker geometries.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe structural characteristics of the S18Q-STUPR11 toolholder make it highly versatile for heavy-duty production runs and precision mold-making workshops alike:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Step Boring:\u003c\/strong\u003e The 93-degree lead clearance allows perpendicular shoulder operations without dragging along the machined wall face.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfile Internal Chamfering:\u003c\/strong\u003e Facilitates complex contoured turning operations inside semi-finished cylinders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThrough-Hole Longitudinal Boring:\u003c\/strong\u003e Ideal for long continuous internal cuts on CNC turning centers and automated multi-axis mill-turn centers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis boring bar is compatible with any standard industrial CNC lathe turret blocks, tool posts, or custom boring sleeve reduction bushings designed to accept 18mm round shanks. It matches seamlessly with standard tool blocks from major global machine brands (including Haas, Mazak, Doosan, DMG Mori, and Fanuc systems). Fits right-handed toolpaths perfectly during internal back-boring or front-boring programs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Toolholder \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo optimize performance across varying cycle run conditions, match your toolholder configuration with the proper BEYOND proprietary insert grade designation:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade:\u003c\/strong\u003e Premium multi-layer PVD nano-coated carbide. Excellent heat barrier formulation specifically tailored to combat sticky build-up edges when boring 316L stainless steel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade:\u003c\/strong\u003e Heavy-duty CVD thick-coated industrial grade. Designed for uninterrupted continuous rough-to-medium profiling cycles across structural alloy steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade:\u003c\/strong\u003e Extremely hard, abrasion-resistant carbide substrate built for high-speed machining of grey and nodular cast iron configurations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eBEYOND is dedicated to providing industrial-grade cutting tools that bridge the gap between premium performance and accessible shop pricing. Our tool holders undergo rigid coordinate measuring machine (CMM) testing to guarantee insert seat positional accuracy within 0.01mm.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Performance Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Flawless Surface Finish on 4140 Steel\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eRigidity is exactly what our machine shop needed. Ran this at 150 m\/min with a 1.5mm depth of cut in pre-hardened 4140 steel, zero vibration chatter marks. Excellent tool life consistency across batches.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Precision Machine Owner (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Qualität und Maßeitigkeit\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSuper Preis-Leistungs-Verhältnis. The 18mm shank diameter fits our tool blocks precisely. Clear chip clearance even in deep blind holes when using the water-soluble coolant jets.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dieter K., Production Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per tornitura interna\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly recommended for small batch prototyping jobs. Swapped our old holders out for this S18Q system. Clamping screw stays secure under cyclic thermal loads. Remember to buy the inserts separately as stated.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Giovanni F., CNC Operator (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"高剛性でビビりなし\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSUS304のボーリング加工で使用。突出し長さを限界まで出しても、ビビることなくきれいな同心度を維持できます。チップの座面精度が非常に良い。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Technical Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum hole diameter required for the S18Q-STUPR11 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum allowable bore diameter (D-min) for the S18Q-STUPR11 boring bar is exactly 22mm (0.866 inches). Attempting to bore a hole smaller than 22mm will cause the flank or heel of the steel tool holder shank to rub against the internal radius of the workpiece wall.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What types of indexable inserts can be clamped into this holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: This internal boring bar is meticulously engineered to accept ISO standard TPMT 1103 (or TPMH 1103) triangular inserts. It features a precision seat pocket configuration matched to an 11mm cutting edge length and an 11-degree positive relief angle clearance setup.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: How far can I safely extend the S18Q-STUPR11 shank from the tool block without chatter?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: As a rule of thumb for steel-shank internal boring tools, the overhang ratio should be restricted to a maximum of 3 to 4 times the shank diameter. For an 18mm shank, the safe structural overhang length ranges up to 54mm to 72mm max. For longer depth requirements, carbide-reinforced shanks should be sourced.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Optimization Panels --\u003e\u003chr style=\"border: 0; border-top: 1px solid #e0e0e0; margin: 30px 0;\"\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch3\u003eGrade Comparison \u0026amp; Technical Troubleshooting Tips\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Guide:\u003c\/strong\u003e If you are converting imperial tooling configurations to metric layouts, this model effectively replaces American Standard designator equivalents such as \u003cstrong\u003eS11M-STUPR3\u003c\/strong\u003e (which features an 11\/16-inch nominal body layout dimensioning archetype).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Boring Deflections:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eIssue - Chip Tangling Inside the Bore:\u003c\/em\u003e Increase feed rate to force chip breaking or choose an indexable insert layout with a sharper, more aggressive positive rake angle (such as the BEYOND HQ chipbreaker).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eIssue - Rapid Nose Radius Wear:\u003c\/em\u003e Lower your circumferential surface speed (Vc) metric index or switch to an advanced multi-layered coating grade variant (such as the BEYOND BYM11 matrix).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Steel Machining (Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Alloys (Highly Suitable)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast Irons (Compatible)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Non-Ferrous Materials (With Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cdiv class=\"detailmodule_text\"\u003e\n\u003ch4\u003eOverview\u003c\/h4\u003e\n\u003cp\u003eThe S18Q-STUPR11 Internal solid carbide boring bar is designed for precision and durability in CNC machining. Featuring a 95° cutting edge angle and an 11° relief angle, this tool holder ensures optimal cutting performance and longevity. Made from high-quality alloy steel, it offers a robust 18mm handle diameter and a total length of 180mm for enhanced stability. Compatible with TPMT110302 and TPMT110304 blades, it is ideal for a range of internal turning applications in CNC lathes.\u003c\/p\u003e\n\u003ch4\u003eFeatures and Specifications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel\u003c\/strong\u003e: S18Q-STUPR11\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e95° cutting edge angle and 11° relief angle.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e:  alloy steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: S-Type (Screw-type)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandle Diameter\u003c\/strong\u003e: 18mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Length\u003c\/strong\u003e: 180mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Blade Length\u003c\/strong\u003e: 11mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScrew Size\u003c\/strong\u003e: M3*8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWrench\u003c\/strong\u003e: T8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Blades\u003c\/strong\u003e: TPMT110302 TPMT110304\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003ePackage Includes:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eS18Q-STUPR11 Boring Bar Tool Holder\u003c\/li\u003e\n\u003cli\u003eCompatible Screws, and Wrenches\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eApplication:\u003c\/h4\u003e\n\u003cp\u003eThe S18Q-STUPR11 is perfect for use with CNC machine tools, CNC lathes, and boring bar sets, specializing in internal boring and turning operations.\u003c\/p\u003e\n\u003ch1\u003eBEYOND S18Q-STUPR11 Internal Turning Tools Holder S18Q STUPR11 STUPR 11 Boring Bar CNC Lathe Cutter Machine STUPR Carbide Inserts TPMT1103 TPMT110304\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ch2\u003eEnhanced Cutting Performance with 95° Edge Angle\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003eRobust Alloy Steel Build for Maximum Durability\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003eVersatile Compatibility with TPMT110302 and TPMT110304 Inserts\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ch3\u003eOptimized 11° Blade Relief for Smooth Cutting\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eErgonomic 18mm Handle Diameter for Improved Control\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eQuick and Convenient Blade Changes with M3 Screws\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e5-Point Description:\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003e95° Cutting Edge Angle\u003c\/strong\u003e\u003cbr\u003eDelivers exceptional precision and smooth internal turning results.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlloy Steel Construction\u003c\/strong\u003e\u003cbr\u003eProvides superior durability and long-lasting performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e11° Blade Relief\u003c\/strong\u003e\u003cbr\u003eEnhances cutting efficiency and minimizes tool wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible with TPMT110302 and TPMT110304 Inserts\u003c\/strong\u003e\u003cbr\u003eVersatile and suitable for a variety of CNC lathes and boring machines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18mm Handle Diameter\u003c\/strong\u003e\u003cbr\u003eEnsures improved control and stability during machining tasks.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopifycdn.net\/s\/files\/1\/0592\/7328\/1708\/files\/S18Q-STUPR11.jpg?v=1719543626\" alt=\"S18Q-STUPR11\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopifycdn.net\/s\/files\/1\/0592\/7328\/1708\/files\/57_02_a2be64bb-04db-4f41-9d08-1d65e54001ce.jpg?v=1719540670\" alt=\"cnc machine cutting\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003c!----\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43621546655916,"sku":"S18Q-STUPR11","price":20.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S18Q-STUPR11_internal_turning_tool_holder_18mm_steel_boring_bar_for_TPMT1103_carbide_inserts_CNC_lathe_machining.jpg?v=1780550803","url":"https:\/\/cnchome-beyond.com\/products\/s18q-stupr11-boring-bar-18mm-cnc-internal-turning-tool-holder","provider":"CNCHome-Beyond","version":"1.0","type":"link"}