{"product_id":"beyond-stgcl1212h09-cnc-left-hand-turning-tool-holder","title":"Beyond STGCL1212H09 CNC Left Hand External Turning Tool Holder","description":"\u003cstyle\u003e\n  :root {\n    --primary-color: #47479F;\n    --text-dark: #222222;\n    --text-light: #ffffff;\n    --bg-light: #f8f9fa;\n    --border-color: #e0e0e0;\n  }\n\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: var(--text-dark);\n    line-height: 1.6;\n    margin: 0 auto;\n    padding: 10px;\n    max-width: 100%;\n    box-sizing: border-box;\n  }\n\n  .beyond-container text-selectable {\n    user-select: text;\n    -webkit-user-select: text;\n  }\n\n  \/* Typography *\/\n  .beyond-container h1, \n  .beyond-container h2, \n  .beyond-container h3, \n  .beyond-container h4 {\n    margin-top: 1.5em;\n    margin-bottom: 0.5em;\n    font-weight: 700;\n  }\n\n  .beyond-hero-title {\n    background-color: var(--primary-color);\n    color: var(--text-light);\n    padding: 20px;\n    font-size: 24px;\n    text-align: center;\n    border-radius: 4px;\n    margin-bottom: 25px;\n  }\n\n  .beyond-section-title {\n    color: var(--primary-color);\n    border-bottom: 2px solid var(--primary-color);\n    padding-bottom: 5px;\n    font-size: 20px;\n  }\n\n  \/* Layout Boxes *\/\n  .beyond-box {\n    border: 2px solid var(--primary-color);\n    border-radius: 6px;\n    padding: 20px;\n    margin: 20px 0;\n    background-color: var(--bg-light);\n  }\n\n  .beyond-dark-banner {\n    background-color: var(--primary-color);\n    color: var(--text-light);\n    padding: 15px;\n    border-radius: 4px;\n    margin: 20px 0;\n  }\n\n  \/* ISO Code Breakdown Box Grid *\/\n  .iso-breakdown-wrapper {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin: 20px 0;\n  }\n\n  .iso-box {\n    border: 1px solid var(--primary-color);\n    border-radius: 4px;\n    padding: 10px;\n    flex: 1 1 calc(12.5% - 10px);\n    min-width: 100px;\n    text-align: center;\n    background-color: #fff;\n  }\n\n  .iso-letter {\n    font-size: 20px;\n    font-weight: bold;\n    color: var(--primary-color);\n    display: block;\n    border-bottom: 1px dashed var(--border-color);\n    padding-bottom: 5px;\n    margin-bottom: 5px;\n  }\n\n  .iso-meaning {\n    font-size: 11px;\n    color: var(--text-dark);\n  }\n\n  \/* Tables *\/\n  .beyond-table-responsive {\n    overflow-x: auto;\n    margin: 20px 0;\n  }\n\n  .beyond-table {\n    width: 100%;\n    border-collapse: collapse;\n    min-width: 600px;\n  }\n\n  .beyond-table th, .beyond-table td {\n    border: 1px solid var(--border-color);\n    padding: 12px;\n    text-align: left;\n    font-size: 14px;\n  }\n\n  .beyond-table th {\n    background-color: var(--primary-color);\n    color: var(--text-light);\n  }\n\n  .beyond-table tr:nth-child(even) {\n    background-color: var(--bg-light);\n  }\n\n  \/* Review Grid *\/\n  .reviews-grid {\n    display: grid;\n    grid-template-columns: 1fr;\n    gap: 15px;\n    margin: 25px 0;\n  }\n\n  @media (min-width: 768px) {\n    .reviews-grid {\n      grid-template-columns: 1fr 1fr;\n    }\n    .beyond-hero-title {\n      font-size: 28px;\n    }\n  }\n\n  .review-card {\n    border: 1px solid var(--border-color);\n    border-left: 4px solid var(--primary-color);\n    border-radius: 4px;\n    padding: 15px;\n    background: #fff;\n  }\n\n  .review-stars {\n    color: #ffcc00;\n    font-size: 16px;\n    margin-bottom: 5px;\n  }\n\n  .review-meta {\n    font-size: 12px;\n    color: #666;\n    margin-top: 8px;\n  }\n\n  \/* FAQ Accordion Layout *\/\n  .faq-item {\n    background: var(--bg-light);\n    border: 1px solid var(--border-color);\n    border-radius: 4px;\n    padding: 15px;\n    margin-bottom: 10px;\n  }\n\n  .faq-question {\n    font-weight: bold;\n    color: var(--primary-color);\n    margin-bottom: 5px;\n  }\n\n  \/* Links Button Box *\/\n  .insert-link-box {\n    display: inline-block;\n    border: 2px dashed var(--primary-color);\n    padding: 12px 24px;\n    border-radius: 4px;\n    text-decoration: none;\n    color: var(--primary-color);\n    font-weight: bold;\n    transition: all 0.3s ease;\n    margin: 15px 0;\n  }\n\n  .insert-link-box:hover {\n    background-color: var(--primary-color);\n    color: var(--text-light);\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container text-selectable\"\u003e\n\u003c!-- H1 Title Banner --\u003e\n\u003ch1 class=\"beyond-hero-title\"\u003eBeyond STGCL1212H09 CNC Left Hand External Turning Tool Holder\u003c\/h1\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003ch2 class=\"beyond-section-title\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 12mm left-hand tool holder is best optimized for high-stability external micro profiling and clean square shoulder facing using positive 60° triangular carbide inserts on micro or compact CNC lathes?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBeyond STGCL1212H09\u003c\/strong\u003e is an industrial-grade, indexable external left-hand turning tool holder engineered for high-precision lathe operations, ultra-fine finishing, and detailed profiling. Forged from high-tensile, heat-treated alloy steel, this tool incorporates a precise \u003cstrong\u003e91-degree approach angle (Lead Angle)\u003c\/strong\u003e. The insert pocket is machined to a micron-level tolerance specifically to host \u003cstrong\u003eTCMT0902--\u003c\/strong\u003e (ANSI \u003cstrong\u003eTCMT1.8(1.5)--\u003c\/strong\u003e) positive triangular carbide inserts. Combining a highly compact 12x12mm square shank with a micro-sized 09 insert profile, it delivers exceptional structural rigidity that eliminates harmonic vibrations during delicate profiling cuts across carbon steels, alloy steels, and stainless steels.\u003c\/p\u003e\n\u003c!-- ISO Designation Breakdown Box --\u003e\n\u003ch3\u003eISO Naming Standard \u0026amp; Blueprint Breakdown\u003c\/h3\u003e\n\u003cp\u003eEvery design metric of this turning bar follows rigorous international standard nomenclature:\u003c\/p\u003e\n\u003cdiv class=\"iso-breakdown-wrapper\"\u003e\n\u003cdiv class=\"iso-box\"\u003e\n\u003cspan class=\"iso-letter\"\u003eS\u003c\/span\u003e\u003cspan class=\"iso-meaning\"\u003eClamping Method:\u003cbr\u003eScrew-On Lock\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-box\"\u003e\n\u003cspan class=\"iso-letter\"\u003eT\u003c\/span\u003e\u003cspan class=\"iso-meaning\"\u003eInsert Shape:\u003cbr\u003eTriangle (60°)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-box\"\u003e\n\u003cspan class=\"iso-letter\"\u003eG\u003c\/span\u003e\u003cspan class=\"iso-meaning\"\u003eApproach Angle:\u003cbr\u003e91° Lead Angle\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-box\"\u003e\n\u003cspan class=\"iso-letter\"\u003eC\u003c\/span\u003e\u003cspan class=\"iso-meaning\"\u003eInsert Clearance:\u003cbr\u003e7° Positive Angle\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-box\"\u003e\n\u003cspan class=\"iso-letter\"\u003eL\u003c\/span\u003e\u003cspan class=\"iso-meaning\"\u003eHand Orientation:\u003cbr\u003eLeft Hand (L)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-box\"\u003e\n\u003cspan class=\"iso-letter\"\u003e1212\u003c\/span\u003e\u003cspan class=\"iso-meaning\"\u003eShank Dimension:\u003cbr\u003e12mm x 12mm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-box\"\u003e\n\u003cspan class=\"iso-letter\"\u003eH\u003c\/span\u003e\u003cspan class=\"iso-meaning\"\u003eOverall Tool Length:\u003cbr\u003e100mm (H)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-box\"\u003e\n\u003cspan class=\"iso-letter\"\u003e09\u003c\/span\u003e\u003cspan class=\"iso-meaning\"\u003eCutting Edge Size:\u003cbr\u003e9mm (TCMT0902)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Key Features --\u003e\n\u003ch2 class=\"beyond-section-title\"\u003eProduct Key Features \u0026amp; Performance Advantages\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuenched Alloy Substrate (HRC 42-45):\u003c\/strong\u003e Crafted from premium 42CrMo structural alloy steel subjected to specialized heat treatment to maximize fatigue life and structural resilience under continuous chip loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicro-Profiling Pocket Geometry:\u003c\/strong\u003e Form-fitted precisely for the compact TCMT0902 size parameters, reducing tip deflection and allowing unmatched dimensional consistency during fine micro-finishing loops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e91° Left-Hand Clearance Configuration:\u003c\/strong\u003e Facilitates seamless left-hand longitudinal turning paths and clean perpendicular shoulder facing steps without rear-wall dragging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnti-Wear Finish Protection:\u003c\/strong\u003e Coated in an industrial-grade matte black oxide layer to resist atmospheric rust, minimize micro-abrasion, and encourage unobstructed chip evaluation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- 3. Specifications Table --\u003e\n\u003ch2 class=\"beyond-section-title\"\u003eTechnical Specifications \u0026amp; Metric vs Imperial Matrix\u003c\/h2\u003e\n\u003c!-- Corresponding Insert Link Box --\u003e\n\u003cdiv class=\"beyond-box\"\u003e\n\u003cstrong\u003eMatched Hardware Link Box:\u003c\/strong\u003e\u003cbr\u003e\n\u003cp\u003eMaximize your machine's output with perfectly matched cutting inserts. Click the link button below to access our selection of premium triangle inserts:\u003c\/p\u003e\n\u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT1102\" target=\"_blank\" rel=\"noopener\"\u003e✦ Shop Compatible TCMT0902 (TCMT1.8) Carbide Inserts ✦\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-table-responsive\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eDimension Property Parameter\u003c\/th\u003e\n\u003cth\u003eMetric Specification (ISO System)\u003c\/th\u003e\n\u003cth\u003eImperial System Equivalent (ANSI)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTool Holder Naming Code\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSTGCL1212H09\u003c\/td\u003e\n\u003ctd\u003eSTGCL08-1.8B (Functional Size Match)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Cross-Section Height \u0026amp; Width\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12 mm x 12 mm\u003c\/td\u003e\n\u003ctd\u003e0.472\" x 0.472\" (Exact 1\/2 Inch Shank)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverall Shank Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100 mm\u003c\/td\u003e\n\u003ctd\u003e3.937\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplicable Insert Profiling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 0902-- (e.g., TCMT090204)\u003c\/td\u003e\n\u003ctd\u003eTCMT 1.8(1.5)1 \/ TCMT 1.8(1.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFastener Clamping Screws\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCentral Torx Screw M2.2 (T6 Wrench)\u003c\/td\u003e\n\u003ctd\u003eHeavy-Duty Insert Screw Equivalent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCutting Hand Direction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLeft Hand (L)\u003c\/td\u003e\n\u003ctd\u003eLeft Hand (L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3\u003eRecommended Industrial Cutting Parameters Matrix\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-responsive\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Matrix\u003c\/th\u003e\n\u003cth\u003eCutting Velocity (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Per Revolution (fn) Range\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCarbon \u0026amp; Alloy Steels (P-Class)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e160 - 290 m\/min (525 - 950 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.03 - 0.15 mm\/rev (0.0012 - 0.006 ipr)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStainless Steel Alloys (M-Class)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e110 - 210 m\/min (360 - 690 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.02 - 0.12 mm\/rev (0.0008 - 0.0048 ipr)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGrey \/ Nodular Cast Iron (K-Class)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120 - 240 m\/min (390 - 785 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.04 - 0.18 mm\/rev (0.0016 - 0.007 ipr)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Applications --\u003e\n\u003ch2 class=\"beyond-section-title\"\u003eIndustrial Product Applications\u003c\/h2\u003e\n\u003cp\u003eThe STGCL1212H09 tool bar is engineered for precision finish turning and delicate profiling inside high-volume production setups:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-Fine Micro Profiling:\u003c\/strong\u003e The compact 12mm shank combined with the ultra-small 09mm insert profile is optimal for fine-finishing applications where tool body clearance and low cutting force are prioritized.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerpendicular Facing Steps:\u003c\/strong\u003e The 91° approach angle allows crisp 90-degree shoulder profiling paths to be faced cleanly in a left-hand feeding track.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall Lathe \u0026amp; Swiss-Type CNC Work:\u003c\/strong\u003e Excellent for multi-purpose tool blocks or small-footprint turrets running standard 12mm tooling racks that require intricate micro-turning capabilities.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003ch2 class=\"beyond-section-title\"\u003eMachinery \u0026amp; Equipment Compatibility\u003c\/h2\u003e\n\u003cp\u003eUniversally compatible with standard CNC automatic turrets, small-footprint production tool blocks, Swiss-type gang tool slides, and conventional lathe quick-change tool posts (QCTP) utilizing standard 12mm (1\/2 inch) tooling slots.\u003c\/p\u003e\n\u003c!-- 6. Material\/Grade Comparison Matrix --\u003e\n\u003ch2 class=\"beyond-section-title\"\u003eBeyond Brand Tooling Grade Comparison Matrix\u003c\/h2\u003e\n\u003cdiv class=\"beyond-table-responsive\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBeyond Holder Grade Line\u003c\/th\u003e\n\u003cth\u003eBase Material Chemistry \u0026amp; Metallurgy\u003c\/th\u003e\n\u003cth\u003ePrimary Optimization Target\u003c\/th\u003e\n\u003cth\u003eAnti-Chatter Rating\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBY-Eco Class (HRC 40)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard 40Cr Structural Carbon Steel\u003c\/td\u003e\n\u003ctd\u003eLight maintenance, manual prototyping\u003c\/td\u003e\n\u003ctd\u003e★★★☆☆\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBY-Pro Class (HRC 45) [This Model]\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePremium Forged 42CrMo Steel Alloy\u003c\/td\u003e\n\u003ctd\u003eHigh production loops, high-feed processing\u003c\/td\u003e\n\u003ctd\u003e★★★★★\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBY-Extreme Master (HRC 48)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHardened Tool Steel + Special Treatment\u003c\/td\u003e\n\u003ctd\u003eSevere interrupted cuts, high-nickel alloys\u003c\/td\u003e\n\u003ctd\u003e★★¼★☆\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003ch2 class=\"beyond-section-title\"\u003eWhy Choose Beyond CNC Tooling?\u003c\/h2\u003e\n\u003cp\u003eBeyond delivers field-proven accuracy for modern production spaces. Through specialized CNC pocket pocketing, our indexable bars provide absolute seat positioning stability, reducing dimensional drift and extending carbide insert life under varied cutting parameters.\u003c\/p\u003e\n\u003ch3\u003eWorldwide Customer Experiences (Verified Toolrooms)\u003c\/h3\u003e\n\u003cdiv class=\"reviews-grid\"\u003e\n\u003cdiv class=\"review-card\"\u003e\n\u003cdiv class=\"review-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Flawless micro-finishing\"\u003c\/strong\u003e\n\u003cp\u003eThe micro 09 insert size on this 12mm holder works flawlessly on our Swiss-type lathe. Tremendous clearance and absolutely zero chatter marks on alloy steel.\u003c\/p\u003e\n\u003cdiv class=\"review-meta\"\u003eMarkus T. — Germany 🇩🇪\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"review-card\"\u003e\n\u003cdiv class=\"review-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Perfect for tight profiling\"\u003c\/strong\u003e\n\u003cp\u003eSuperb pocket precision. Fits cleanly into our compact gang tool slots. The 91-degree clearance is perfect for clean shoulder facing steps.\u003c\/p\u003e\n\u003cdiv class=\"review-meta\"\u003eDave R. — United States 🇺🇸\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"review-card\"\u003e\n\u003cdiv class=\"review-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Eccellente per piccole parti\"\u003c\/strong\u003e\n\u003cp\u003eSturdy steel body with deep black oxide protection. The small insert profile keeps cutting resistance very low, which is ideal for thin workpiece materials.\u003c\/p\u003e\n\u003cdiv class=\"review-meta\"\u003eFabrizio M. — Italy 🇮🇹\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"review-card\"\u003e\n\u003cdiv class=\"review-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Highly accurate pocket matching\"\u003c\/strong\u003e\n\u003cp\u003eThe pocket machining accuracy is outstanding. It supports our TCMT09 inserts solidly, improving tool life during continuous micro-turning cycles.\u003c\/p\u003e\n\u003cdiv class=\"review-meta\"\u003eKenji Y. — Japan 🇯🇵\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ Layout --\u003e\n\u003ch2 class=\"beyond-section-title\"\u003eAI-Style FAQ Assistant\u003c\/h2\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003eQ: Can I use TCMT1102 or TCMT16T3 inserts on this tool holder?\u003c\/div\u003e\n\u003cdiv class=\"faq-content\"\u003eA: No. The final digits \"09\" indicate that this holder pocket is explicitly machined for the smaller **TCMT0902** series. Larger inserts will not fit this seat configuration.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003eQ: What is the benefit of using an 09-size insert compared to an 11-size insert?\u003c\/div\u003e\n\u003cdiv class=\"faq-content\"\u003eA: The 09-size insert provides a shorter cutting edge and a tighter structural nose layout. This reduces cutting forces and maximizes entry clearance, making it highly preferred for delicate micro-machining on slim parts.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003eQ: Does this package include the necessary wrench and screws?\u003c\/div\u003e\n\u003cdiv class=\"faq-content\"\u003eA: Yes. Every Beyond tool holder block ships complete with its matching high-tensile locking screw (M2.2) and the corresponding Torx wrench.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Informational Tips Area --\u003e\n\u003cdiv class=\"beyond-dark-banner\"\u003e\n\u003ch3\u003e⚙️ Pro Lathe Operative Tips \u0026amp; Industrial Troubleshooting\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade Optimization Checklist:\u003c\/strong\u003e Ensure your insert's chipbreaker and coating match your stock material. Choose thin PVD micro-grain coatings for stainless steels to reduce work hardening, and thick CVD aluminum-oxide layers for casting runs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEquivalent Industrial Models:\u003c\/strong\u003e Under classic imperial measurements, this 12mm unit acts as a direct dimensional functional equivalent to the standard **STGCL08-1.8B** family line using a 1\/2-inch bar body.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTroubleshooting Tool Overhang:\u003c\/strong\u003e When optimizing for high-precision finishes, minimize holder extension. For optimum structural stability, the protruding distance from your tool block should never exceed 3 times the shank height ($3 \\times 12\\text{mm} = 36\\text{mm}$).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43584646971564,"sku":"STGCL1212H09","price":16.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/Beyond_STGCL1212H09_left_hand_indexable_CNC_turning_tool_holder_with_12x12mm_shank_for_TCMT0902_triangle_inserts..jpg?v=1778917087","url":"https:\/\/cnchome-beyond.com\/products\/beyond-stgcl1212h09-cnc-left-hand-turning-tool-holder","provider":"CNCHome-Beyond","version":"1.0","type":"link"}