{"product_id":"h12l-stupr09-hss-internal-boring-bar","title":"BEYOND H12L-STUPR09 High-Speed Steel Internal Boring Bar \u0026 Turning Tool Holder | CNC Lathe Tool for TPMT090204 Inserts (Insert Not Included)","description":"\u003cdiv style=\"font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif; color: #2d3748; line-height: 1.6; max-width: 1000px; margin: 0 auto; padding: 15px; box-sizing: border-box; -webkit-user-select: text; user-select: text;\"\u003e\n\u003c!-- H1 Banner Header --\u003e\n\u003cdiv style=\"background-color: #47479f; color: #ffffff; padding: 28px 20px; border-radius: 8px; text-align: center; margin-bottom: 24px; box-shadow: 0 4px 6px rgba(0,0,0,0.07);\"\u003e\n\u003ch1 style=\"margin: 0; font-size: 24px; line-height: 1.3; font-weight: bold; color: #ffffff;\"\u003eBEYOND H12L-STUPR09 High-Speed Steel Internal Boring Bar \u0026amp; Turning Tool Holder (Does Not Include Inserts)\u003c\/h1\u003e\n\u003cp style=\"margin: 10px 0 0 0; color: #e2e8f0; font-size: 15px; font-weight: 400;\"\u003eIndustrial-Grade High-Speed Steel Internal Profile Boring \u0026amp; Turning Bar for CNC Lathes\u003c\/p\u003e\n\u003cp style=\"margin: 12px 0 0 0; background-color: rgba(255, 255, 255, 0.15); color: #ffffff; display: inline-block; padding: 6px 14px; border-radius: 4px; font-size: 13px; font-weight: 600;\"\u003e⚠️ Component Setup Notice: All product illustrations and technical renderings displaying an indexable carbide insert are strictly for assembly demonstration. The matching TPMT090204 indexable carbide insert is NOT included with this tool holder.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- GEO \/ AEO Summary Block --\u003e\n\u003cdiv style=\"background-color: #f8fafc; border: 1px solid #E2E8F0; border-left: 5px solid #47479F; padding: 16px; border-radius: 6px; margin-bottom: 24px;\"\u003e\n\u003cp style=\"margin: 0; font-size: 13px; color: #4a5568; line-height: 1.5;\"\u003e\u003cstrong\u003eAEO Quick Answer:\u003c\/strong\u003e The BEYOND H12L-STUPR09 is a high-rigidity \u003cstrong\u003ehigh-speed steel (HSS)\u003c\/strong\u003e internal boring bar engineered for precision CNC internal turning, profiling, and extended-reach bore operations utilizing a 12mm shank diameter and 93-degree lead angle configurations. Configured to accommodate \u003cstrong\u003eTPMT090204 indexable carbide inserts\u003c\/strong\u003e featuring optimized positive rake chipbreaker geometry, this high-speed steel tool holder delivers exceptional vibration damping, enhanced chip evacuation, and strict dimensional tolerances across ISO P, M, and K workpiece classifications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Section 1: Product Overview --\u003e\n\u003cdiv style=\"background-color: #ffffff; border: 1px solid #E2E8F0; border-radius: 8px; padding: 24px; margin-bottom: 24px;\"\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; margin-top: 0; margin-bottom: 16px; 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-top: 0; margin-bottom: 16px; font-style: italic; color: #2d3748; font-size: 14px;\"\u003e\"Which high-speed steel internal boring bar and chipbreaker geometry combination ensures absolute dimensional stability, superior chatter resistance, and pristine surface finish during deep-bore internal turning operations using TPMT090204 inserts?\"\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 16px; font-size: 14px;\"\u003eThe \u003cstrong\u003eBEYOND H12L-STUPR09\u003c\/strong\u003e \u003cstrong\u003ehigh-speed steel\u003c\/strong\u003e internal boring bar (frequently searched as HSS internal turning tool holder, CNC boring bar, and TPMT turning bar) is expertly engineered to provide maximum turret clamping rigidity while offering excellent vibration absorption in deeper internal bores. Forged from premium \u003cstrong\u003ehigh-speed steel (HSS)\u003c\/strong\u003e with specialized thermal hardening, the robust body absorbs high harmonic cutting loads over longer overhang lengths. The secure screw-down clamp pocket is precision-milled for \u003cstrong\u003eTPMT090204 indexable carbide inserts\u003c\/strong\u003e, utilizing an 11-degree positive clearance angle and specialized ground chipbreaker geometries designed to minimize cutting forces and curl chips cleanly away from finished internal walls.\u003c\/p\u003e\n\u003ch3 style=\"font-size: 16px; color: #2d3748; margin-top: 20px; margin-bottom: 12px; font-weight: 600;\"\u003eISO Model Designation Breakdown\u003c\/h3\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px;\"\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 8px; border-radius: 6px; text-align: center; flex: 1; min-width: 45px; background-color: #f8fafc;\"\u003e\n\u003cstrong style=\"color: #47479f; display: block; font-size: 12px;\"\u003eH\u003c\/strong\u003e\u003cspan style=\"font-size: 9px; color: #4a5568;\"\u003eHigh-Speed Steel Body \/ Heavy Duty Tool Material\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 8px; border-radius: 6px; text-align: center; flex: 1; min-width: 45px; background-color: #f8fafc;\"\u003e\n\u003cstrong style=\"color: #47479f; display: block; font-size: 12px;\"\u003e12\u003c\/strong\u003e\u003cspan style=\"font-size: 9px; color: #4a5568;\"\u003eShank Diameter Size (12 mm)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 8px; border-radius: 6px; text-align: center; flex: 1; min-width: 45px; background-color: #f8fafc;\"\u003e\n\u003cstrong style=\"color: #47479f; display: block; font-size: 12px;\"\u003eL\u003c\/strong\u003e\u003cspan style=\"font-size: 9px; color: #4a5568;\"\u003eTool Length Code (Approx. 140mm Overall Length)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 8px; border-radius: 6px; text-align: center; flex: 1; min-width: 45px; background-color: #f8fafc;\"\u003e\n\u003cstrong style=\"color: #47479f; display: block; font-size: 12px;\"\u003eS\u003c\/strong\u003e\u003cspan style=\"font-size: 9px; color: #4a5568;\"\u003eScrew-Down Clamping System\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 8px; border-radius: 6px; text-align: center; flex: 1; min-width: 45px; background-color: #f8fafc;\"\u003e\n\u003cstrong style=\"color: #47479f; display: block; font-size: 12px;\"\u003eU\u003c\/strong\u003e\u003cspan style=\"font-size: 9px; color: #4a5568;\"\u003eTriangular 60° Insert Shape (Specialized Geometry)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 8px; border-radius: 6px; text-align: center; flex: 1; min-width: 45px; background-color: #f8fafc;\"\u003e\n\u003cstrong style=\"color: #47479f; display: block; font-size: 12px;\"\u003eP\u003c\/strong\u003e\u003cspan style=\"font-size: 9px; color: #4a5568;\"\u003e93° Approach \/ Lead Angle (Positive Hand Style)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 8px; border-radius: 6px; text-align: center; flex: 1; min-width: 45px; background-color: #f8fafc;\"\u003e\n\u003cstrong style=\"color: #47479f; display: block; font-size: 12px;\"\u003eR\u003c\/strong\u003e\u003cspan style=\"font-size: 9px; color: #4a5568;\"\u003eRight-Handed Cutting Orientation\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 8px; border-radius: 6px; text-align: center; flex: 1; min-width: 45px; background-color: #f8fafc;\"\u003e\n\u003cstrong style=\"color: #47479f; display: block; font-size: 12px;\"\u003e09\u003c\/strong\u003e\u003cspan style=\"font-size: 9px; color: #4a5568;\"\u003eInsert Cutting Edge Length Index (09 Series)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px dashed #47479F; border-radius: 8px; padding: 20px; text-align: center; margin-top: 20px; background-color: #fafbfd;\"\u003e\n\u003cp style=\"margin: 0 0 12px 0; font-size: 14px; font-weight: 500; color: #2d3748;\"\u003eNeed alternative STUPR high-speed steel boring bar sizes or lengths?\u003c\/p\u003e\n\u003cdiv style=\"display: inline-block; background-color: #47479f; border-radius: 6px; padding: 10px 20px;\"\u003e\u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TPMT090204\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan style=\"color: #ffffff;\"\u003e\u003cb\u003e[ View Complete BEYOND STUPR Tool Catalog ] →\u003c\/b\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Section 2: Product Core Advantages --\u003e\n\u003cdiv style=\"background-color: #ffffff; border: 1px solid #E2E8F0; border-radius: 8px; padding: 24px; margin-bottom: 24px;\"\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; margin-top: 0; margin-bottom: 16px; border-bottom: 2px solid #47479F; padding-bottom: 8px;\"\u003e2. Product Core Advantages\u003c\/h2\u003e\n\u003cul style=\"margin: 0; padding-left: 20px; color: #4a5568; font-size: 14px;\"\u003e\n\u003cli style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003eHigh-Speed Steel Rigidity:\u003c\/strong\u003e Premium HSS material composition dampens harmonic chatter during internal boring operations in extended bores.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003ePrecision Screw-Down Clamping:\u003c\/strong\u003e Locks TPMT090204 indexable inserts securely against locating pads, preventing micro-shifting under heavy interrupted cuts.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003eOptimized 93° Lead Angle:\u003c\/strong\u003e Facilitates smooth profile turning, boring, and facing with minimal radial cutting force component.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003eOptimal 12mm Diameter:\u003c\/strong\u003e Perfectly proportioned for deeper internal bore machining and versatile profiling applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- Section 3: Technical Specifications \u0026 Cutting Parameters --\u003e\n\u003cdiv style=\"background-color: #ffffff; border: 1px solid #E2E8F0; border-radius: 8px; padding: 24px; margin-bottom: 24px;\"\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; margin-top: 0; margin-bottom: 16px; 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; text-align: left; margin-bottom: 20px;\"\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;\"\u003eTechnical Parameter\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #CBD5E0; text-align: left;\"\u003eImperial Specification\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #CBD5E0; text-align: left;\"\u003eMetric Equivalent\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #E2E8F0;\"\u003eShank Diameter (D)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #E2E8F0;\"\u003eApprox. 0.47\" (15\/32 Inch)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #E2E8F0;\"\u003e12.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8fafc;\"\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #E2E8F0;\"\u003eOverall Length (L)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #E2E8F0;\"\u003eApprox. 5.51\" (L designation)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #E2E8F0;\"\u003e140.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #E2E8F0;\"\u003eCompatible Insert Size\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #E2E8F0;\"\u003eTPMT 09 Series\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #E2E8F0;\"\u003eTriangular 11° Positive Insert\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8fafc;\"\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #E2E8F0;\"\u003eHand Orientation \u0026amp; Angle\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #E2E8F0;\"\u003eSTUPR (Right-Handed, 93°)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #E2E8F0;\"\u003eRight Hand Internal Boring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"font-size: 15px; color: #2d3748; margin-top: 15px; margin-bottom: 10px;\"\u003eRecommended Cutting Parameters (TPMT090204 Inserts) - Dual-Column Reference\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 13px; text-align: left;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #2d3748; color: #ffffff;\"\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;\"\u003eFeed Rate (fn, mm\/rev) \u0026amp; Depth (ap)\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 #E2E8F0;\"\u003eISO P (Carbon \u0026amp; Alloy Steel)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #E2E8F0;\"\u003e100 - 180 m\/min\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #E2E8F0;\"\u003efn: 0.03 - 0.10 mm\/rev | ap: 0.2 - 1.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8fafc;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #E2E8F0;\"\u003eISO M (Stainless Steel)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #E2E8F0;\"\u003e70 - 130 m\/min\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #E2E8F0;\"\u003efn: 0.02 - 0.08 mm\/rev | ap: 0.2 - 0.8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #E2E8F0;\"\u003eISO K (Cast Iron)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #E2E8F0;\"\u003e90 - 160 m\/min\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #E2E8F0;\"\u003efn: 0.04 - 0.12 mm\/rev | ap: 0.3 - 1.2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Section 4: Applications --\u003e\n\u003cdiv style=\"background-color: #ffffff; border: 1px solid #E2E8F0; border-radius: 8px; padding: 24px; margin-bottom: 24px;\"\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; margin-top: 0; margin-bottom: 16px; border-bottom: 2px solid #47479F; padding-bottom: 8px;\"\u003e4. Product Applications\u003c\/h2\u003e\n\u003cul style=\"margin: 0; padding-left: 20px; color: #4a5568; font-size: 14px;\"\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eExtended Bore ID Boring:\u003c\/strong\u003e Precision roughing and finishing passes inside deeper cylindrical cavities.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eInternal Profiling \u0026amp; Facing:\u003c\/strong\u003e Achieving high dimensional accuracy and superior surface finishes in elongated internal bores.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003ePrecision Industrial Manufacturing:\u003c\/strong\u003e Ideal for precision bushings, extended sleeves, and deep-pocket industrial components.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- Section 5: Compatibility --\u003e\n\u003cdiv style=\"background-color: #ffffff; border: 1px solid #E2E8F0; border-radius: 8px; padding: 24px; margin-bottom: 24px;\"\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; margin-top: 0; margin-bottom: 16px; border-bottom: 2px solid #47479F; padding-bottom: 8px;\"\u003e5. Compatibility \u0026amp; Accessories\u003c\/h2\u003e\n\u003cp style=\"font-size: 14px; margin-bottom: 10px;\"\u003e\u003cstrong\u003eInsert Compatibility:\u003c\/strong\u003e Universal matching compliance with industry-standard \u003cstrong\u003eTPMT090204\u003c\/strong\u003e triangular 11-degree positive indexable carbide inserts.\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; margin-bottom: 10px;\"\u003e\u003cstrong\u003eTool Holding:\u003c\/strong\u003e Designed with a 12mm cylindrical shank to secure firmly into CNC lathe turret boring blocks and split reduction sleeves.\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; margin: 0;\"\u003e\u003cstrong\u003eClamping Hardware:\u003c\/strong\u003e Equipped with premium precision TORX screws and clamping elements designed to secure inserts firmly under radial cutting stress.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Section 6: Material Comparison --\u003e\n\u003cdiv style=\"background-color: #ffffff; border: 1px solid #E2E8F0; border-radius: 8px; padding: 24px; margin-bottom: 24px;\"\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; margin-top: 0; margin-bottom: 16px; border-bottom: 2px solid #47479F; padding-bottom: 8px;\"\u003e6. Material Comparison: High-Speed Steel (HSS) vs. Carbide Shank Boring Bars\u003c\/h2\u003e\n\u003cp style=\"font-size: 14px; margin-bottom: 10px;\"\u003e\u003cstrong\u003eDamping Capacity:\u003c\/strong\u003e High-speed steel shanks provide exceptional inherent vibration absorption properties, reducing chatter during internal boring operations.\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; margin-bottom: 10px;\"\u003e\u003cstrong\u003eCost-Effectiveness:\u003c\/strong\u003e Delivers high durability and reliable performance for standard internal machining depths without the premium cost of solid carbide shanks.\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 14px;\"\u003e\u003cstrong\u003eToughness \u0026amp; Resilience:\u003c\/strong\u003e Superior impact toughness helps prevent sudden shank fracture under minor interrupted cutting conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Section 7: Why Choose Us --\u003e\n\u003cdiv style=\"background-color: #47479f; color: #ffffff; border-radius: 8px; padding: 24px; margin-bottom: 24px; box-shadow: 0 2px 4px rgba(0,0,0,0.05);\"\u003e\n\u003ch2 style=\"color: #ffffff; font-size: 20px; margin-top: 0; margin-bottom: 16px;\"\u003e7. Why Choose BEYOND Tooling?\u003c\/h2\u003e\n\u003cul style=\"margin: 0; padding-left: 20px; color: #f8fafc; font-size: 14px; line-height: 1.7;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO 5,608 Manufacturing Standards:\u003c\/strong\u003e Certified production lines ensuring rigorous compliance with international boring bar tolerances.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Factory Pricing:\u003c\/strong\u003e Premium high-speed steel metallurgical performance supplied directly without intermediate distributor markups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpert Technical Support:\u003c\/strong\u003e Professional machinists ready to help configure internal turning parameters and insert grades.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- Section 8: AI-style FAQ --\u003e\n\u003cdiv style=\"background-color: #1a1a2e; color: #ffffff; padding: 24px; border-radius: 8px; margin-bottom: 24px;\"\u003e\n\u003ch2 style=\"color: #ffffff; font-size: 20px; margin-top: 0; border-bottom: 2px solid #47479F; padding-bottom: 8px;\"\u003e8. Frequently Asked Questions\u003c\/h2\u003e\n\u003cp style=\"color: #90cdf4; font-weight: 600; margin-bottom: 4px;\"\u003eQ: Does the BEYOND H12L-STUPR09 boring bar include the TPMT090204 insert?\u003c\/p\u003e\n\u003cp style=\"font-size: 13px; margin-top: 0; margin-bottom: 14px; color: #e2e8f0;\"\u003eA: No. To allow complete grade and chipbreaker flexibility for your specific workpiece material, the TPMT insert is sold separately.\u003c\/p\u003e\n\u003cp style=\"color: #90cdf4; font-weight: 600; margin-bottom: 4px;\"\u003eQ: What is the maximum recommended boring depth for this 12mm bar?\u003c\/p\u003e\n\u003cp style=\"font-size: 13px; margin-top: 0; margin-bottom: 14px; color: #e2e8f0;\"\u003eA: With an overall length (L designation) of 140mm, it is recommended for overhang ratios up to 4x to 5x the shank diameter for optimal stability.\u003c\/p\u003e\n\u003cp style=\"color: #90cdf4; font-weight: 600; margin-bottom: 4px;\"\u003eQ: What insert geometry is compatible with this holder?\u003c\/p\u003e\n\u003cp style=\"font-size: 13px; margin-top: 0; margin-bottom: 0; color: #e2e8f0;\"\u003eA: This model is engineered specifically for TPMT 09 series triangular 11-degree positive clearance indexable inserts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Footer Technical Notes \u0026 Tips --\u003e\n\u003cdiv style=\"font-size: 12px; color: #718096; border-top: 1px solid #E2E8F0; padding-top: 16px;\"\u003e\n\u003cp style=\"margin: 0 0 8px 0;\"\u003e\u003cstrong\u003eGrade Comparison:\u003c\/strong\u003e PVD coated carbide grades provide exceptional edge toughness for stainless steel internal turning; CVD coated grades offer superior crater wear resistance in carbon and alloy steels.\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 8px 0;\"\u003e\u003cstrong\u003eEquivalent Models:\u003c\/strong\u003e Fully cross-compatible with universal modular internal boring systems adhering to strict ISO \/ ANSI manufacturing standards.\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 8px 0;\"\u003e\u003cstrong\u003eTroubleshooting:\u003c\/strong\u003e Excessive chatter or poor surface finish in bores usually indicates excessive overhang ratio or worn insert nose radius; reduce feed rate or shorten bar stickout.\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 8px 0;\"\u003e\u003cstrong\u003eWorkpiece Material Matrix:\u003c\/strong\u003e Fully performance-optimized for ISO P, ISO M, and ISO K industrial material classifications.\u003c\/p\u003e\n\u003cp style=\"margin: 0;\"\u003e\u003cstrong\u003eAuthoritative Endorsement:\u003c\/strong\u003e Dimensional parameters and structural tolerances benchmarked against \u003cstrong\u003eISO 5,608 Tool Holder Standards\u003c\/strong\u003e and certified high-speed steel (HSS) specifications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43682278277292,"sku":"H12L-STUPR09","price":29.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_H12L-STUPR09_high_speed_steel_internal_boring_bar_profile_layout.jpg?v=1787731161","url":"https:\/\/cnchome-beyond.com\/products\/h12l-stupr09-hss-internal-boring-bar","provider":"CNCHome-Beyond","version":"1.0","type":"link"}