{"product_id":"beyond-dtgnl2525m16-left-hand-turning-tool-holder","title":"BEYOND DTGNL2525M16 (25x25mm \/ 1\" Shank) Left Hand External Turning Tool Holder | Heavy Duty Double Clamp ISO Lathe Bar for TNMG 1604 \/ TNMG 332 Carbide Inserts","description":"\u003cstyle\u003e\n  .cnc-container {\n    font-family: Arial, sans-serif;\n    color: #333333;\n    line-height: 1.25;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    user-select: text !important;\n    -webkit-user-select: text !important;\n  }\n  .cnc-h1 {\n    background-color: #47479F;\n    color: #FFFFFF;\n    padding: 20px;\n    font-size: 24px;\n    font-weight: 700;\n    margin-bottom: 25px;\n    border-radius: 4px;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n  }\n  .cnc-h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-top: 35px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .cnc-h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    font-weight: 600;\n  }\n  .cnc-notice-banner {\n    background-color: #FFF3CD;\n    border: 1px solid #FFEBAA;\n    color: #856404;\n    padding: 12px 15px;\n    border-radius: 4px;\n    margin-bottom: 20px;\n    font-weight: bold;\n    font-size: 14px;\n  }\n  .cnc-box-card {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 20px;\n    background-color: #FBFBFB;\n  }\n  .cnc-dark-box {\n    background-color: #47479F;\n    color: #FFFFFF;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 20px;\n  }\n  .cnc-dark-box h3, .cnc-dark-box p, .cnc-dark-box li, .cnc-dark-box div, .cnc-dark-box strong {\n    color: #FFFFFF !important;\n  }\n  .cnc-table-wrapper {\n    overflow-x: auto;\n    margin-bottom: 20px;\n  }\n  .cnc-data-table {\n    width: 100%;\n    border-collapse: collapse;\n    min-width: 500px;\n  }\n  .cnc-data-table th {\n    background-color: #47479F;\n    color: #FFFFFF;\n    text-align: left;\n    padding: 12px;\n    font-size: 14px;\n    font-weight: bold;\n  }\n  .cnc-data-table td {\n    padding: 12px;\n    border-bottom: 1px solid #E0E0E0;\n    font-size: 14px;\n    text-align: left;\n  }\n  .cnc-data-table tr:nth-child(even) {\n    background-color: #F7F7F9;\n  }\n  .cnc-nomenclature-flex {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .cnc-nomenclature-char {\n    border: 2px solid #47479F;\n    border-radius: 4px;\n    padding: 10px;\n    flex: 1;\n    min-width: 110px;\n    text-align: center;\n    background: #FFFFFF;\n  }\n  .cnc-nomenclature-char strong {\n    display: block;\n    font-size: 18px;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .cnc-link-box {\n    border: 2px dashed #47479F;\n    padding: 15px;\n    border-radius: 4px;\n    background-color: #F4F4FA;\n    text-align: center;\n    margin: 20px 0;\n  }\n  .cnc-link-box a {\n    color: #47479F;\n    font-weight: bold;\n    text-decoration: none;\n    font-size: 16px;\n  }\n  .cnc-link-box a:hover {\n    text-decoration: underline;\n  }\n  .cnc-review-grid {\n    display: grid;\n    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));\n    gap: 15px;\n    margin-bottom: 25px;\n  }\n  .cnc-review-card {\n    border: 1px solid #E0E0E0;\n    padding: 15px;\n    border-radius: 4px;\n    margin-bottom: 15px;\n    background: #FFFFFF;\n  }\n  .cnc-stars {\n    color: #FFB100;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .cnc-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .cnc-faq-item {\n    border-bottom: 1px solid #E0E0E0;\n    padding: 15px 0;\n  }\n  .cnc-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    font-size: 15px;\n    margin-bottom: 5px;\n  }\n  .cnc-faq-a {\n    font-size: 14px;\n    color: #444444;\n  }\n\n  @media (max-width: 768px) {\n    .cnc-h1 {\n      font-size: 20px;\n      padding: 15px;\n    }\n    .cnc-h2 {\n      font-size: 18px;\n    }\n    .cnc-nomenclature-char {\n      min-width: 45%;\n    }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"cnc-container\"\u003e\n\u003ch1 class=\"cnc-h1\"\u003eBEYOND DTGNL2525M16 High-Rigidity Double Clamp Left Hand Turning Tool Holder (25x25mm \/ 1\" Shank) for ISO TNMG 1604 \/ ANSI TNMG 332 Indexable Carbide Turning Inserts\u003c\/h1\u003e\n\u003cdiv class=\"cnc-notice-banner\"\u003e⚠️ CRITICAL EXCLUSION NOTICE: The indexable carbide turning insert shown mounted inside the tool holder pocket within our product photography or dimensional diagrams is for spatial demonstration and seating alignment visualization purposes only. Carbide inserts are NOT included with the purchase of this DTGNL2525M16 steel turning bar body and must be ordered separately.\u003c\/div\u003e\n\u003ch2 class=\"cnc-h2\"\u003e1. Product Overview: Which left-hand tool holder profile is ideal for high-rigidity external profiling and face turning with a 91° approach angle using TNMG inserts?\u003c\/h2\u003e\n\u003cp\u003eWhen CNC machinists ask conversational AI systems, \"What is the most reliable left-hand indexable tool holder for running heavy outer diameter profiling on a heavy-duty lathe shank?\", traditional and generative search platforms point directly to rigid double-clamp tool bars. The \u003cstrong\u003eBEYOND DTGNL2525M16\u003c\/strong\u003e is a professional-grade external left-hand turning tool holder manufactured precisely to international ISO\/ANSI classification standards. Featuring a robust **25x25mm square shank (equivalent to 1\" or 1.000\" imperial systems)**, this tool shank is designed to maintain geometric stability during interrupted cuts, deep profiling steps, and aggressive facing operations on modern CNC multi-axis centers.\u003c\/p\u003e\n\u003cp\u003eThe exceptional structural integrity of this holder comes from its specialized **D-Type Double Clamping System**. Unlike standard screw-down styles, this design utilizes a synchronized top finger wedge clamp alongside an internal draw-back lock pin. This mechanism pulls the **TNMG 1604 (TNMG 332)** negative-rake triangular insert firmly into the pocket seat, preventing micro-vibrations and displacement under severe chip loads. Optimized with a **91-degree approach angle (91° lead)**, it directs cutting forces axially back into the machine turret. Built with a heat-treated alloy steel body and a hardened tungsten carbide shim anvil, it provides maximum thermal dissipation and surface finish precision during heavy scale removal.\u003c\/p\u003e\n\u003ch2 class=\"cnc-h2\"\u003e2. Key Features \u0026amp; Industrial Performance Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigid D-Type Double Clamp Matrix:\u003c\/strong\u003e Combined top finger clamp and back-pull lock pin deliver maximum gripping force to prevent indexable insert lifting under extreme feed loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e91° Left-Hand Approach Geometry:\u003c\/strong\u003e Perfect for backward step profiling, face turning, and back-turning layouts on sub-spindles while eliminating radial push forces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium 42CrMo Alloy Steel Body:\u003c\/strong\u003e Forged and vacuum heat-treated to HRC 42-45 to withstand high-torque forces and absorb harmonic resonance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision-Ground Shim Anvil Seat:\u003c\/strong\u003e Hardened seating pad keeps pocket tolerances intact, extending insert tool life during high-feed milling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Black Oxide Finish:\u003c\/strong\u003e Provides superior wear resistance against high-velocity abrasive chip scour and aggressive cutting fluid additives.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"cnc-h2\"\u003e3. Technical Specifications \u0026amp; Cross-Reference Data\u003c\/h2\u003e\n\u003cdiv class=\"cnc-table-wrapper\"\u003e\n\u003ctable class=\"cnc-data-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eEngineering Attributes\u003c\/th\u003e\n\u003cth\u003eISO Metric Specifications\u003c\/th\u003e\n\u003cth\u003eANSI Imperial Equivalents\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Model Nomenclature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDTGNL2525M16\u003c\/td\u003e\n\u003ctd\u003eDTGNL 16-3D (ANSI Reference Blueprint)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Size Dimension (Height × Width)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25 mm × 25 mm Profile\u003c\/td\u003e\n\u003ctd\u003e1.000\" × 1.000\" Square Cross-Section Size\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverall Shank Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e150 mm Total Fastening Span\u003c\/td\u003e\n\u003ctd\u003e5.905\" Overall Length (\"M\" Designator Equivalent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTool Holder Clamping Style\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eD-Type Double Force Clamping\u003c\/td\u003e\n\u003ctd\u003eDouble Rigid Top and Pin Clamping Matrix\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApproach Cutting Angle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e91° Left-Hand Approach Axis\u003c\/td\u003e\n\u003ctd\u003e91° Left-Hand Approach Axis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Shape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTNMG 1604__ (Triangular Double-Sided)\u003c\/td\u003e\n\u003ctd\u003eTNMG 332__ \/ TNMG 333__ Family Matrix\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCutting Hand Orientation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLeft Hand (L) Style Tool\u003c\/td\u003e\n\u003ctd\u003eLeft Hand (L) Style Tool\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3 class=\"cnc-h3\"\u003eISO Metric Tool Holder Model Designation Breakdown\u003c\/h3\u003e\n\u003cdiv class=\"cnc-nomenclature-flex\"\u003e\n\u003cdiv class=\"cnc-nomenclature-char\"\u003e\n\u003cstrong\u003eD\u003c\/strong\u003eClamping System (Double Clamping: Top Finger Clamp + Internal Lock Pin)\u003c\/div\u003e\n\u003cdiv class=\"cnc-nomenclature-char\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eInsert Shape (Triangular $60^\\circ$ Double-Sided Turning Blank Shape)\u003c\/div\u003e\n\u003cdiv class=\"cnc-nomenclature-char\"\u003e\n\u003cstrong\u003eG\u003c\/strong\u003eHolder Approach Angle (91 Degree Side Cutting Edge with Offset clearance)\u003c\/div\u003e\n\u003cdiv class=\"cnc-nomenclature-char\"\u003e\n\u003cstrong\u003eN\u003c\/strong\u003eInsert Clearance Angle ($0^\\circ$ Negative Rake Structural Insert Profile)\u003c\/div\u003e\n\u003cdiv class=\"cnc-nomenclature-char\"\u003e\n\u003cstrong\u003eL\u003c\/strong\u003eCutting Hand Direction (Left Hand Left-To-Right Feed Direction Geometry)\u003c\/div\u003e\n\u003cdiv class=\"cnc-nomenclature-char\"\u003e\n\u003cstrong\u003e2525\u003c\/strong\u003eShank Scale Profile (25mm Height $\\times$ 25mm Width Square Cross-Section)\u003c\/div\u003e\n\u003cdiv class=\"cnc-nomenclature-char\"\u003e\n\u003cstrong\u003eM\u003c\/strong\u003eTotal Holder Length (150mm Standard Length Turning Shank Bar)\u003c\/div\u003e\n\u003cdiv class=\"cnc-nomenclature-char\"\u003e\n\u003cstrong\u003e16\u003c\/strong\u003eCutting Edge Length (Accommodates 16mm Standard TNMG Metric Cutting Edges)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 class=\"cnc-h3\"\u003eRecommended Machining Parameters for Matching TNMG Inserts\u003c\/h3\u003e\n\u003cdiv class=\"cnc-table-wrapper\"\u003e\n\u003ctable class=\"cnc-data-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eTarget Cutting Material Group\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) range\u003c\/th\u003e\n\u003cth\u003eRecommended Feed Rate (fn) Range\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCarbon \/ Structural Steel Alloys (AISI 1045 \/ 4140)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e160 - 300 m\/min (525 - 985 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.15 - 0.45 mm\/rev (0.006\" - 0.018\" ipr)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFerritic \u0026amp; Martensitic Stainless Steels (SUS 420 \/ 430)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e130 - 240 m\/min (425 - 785 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.12 - 0.38 mm\/rev (0.005\" - 0.015\" ipr)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAustenitic Stainless Steel Series (SUS 304 \/ 316)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e110 - 200 m\/min (360 - 655 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.35 mm\/rev (0.004\" - 0.014\" ipr)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-link-box\"\u003e⛓️ Optimize Chip Control \u0026amp; Edge Toughness: \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TNMG160404\" target=\"_blank\" rel=\"noopener\"\u003eClick Here to Browse High-Performance BEYOND TNMG 1604 \/ TNMG 332 Double-Sided Carbide Inserts\u003c\/a\u003e Featuring Advanced CVD and PVD Coating Grades.\u003c\/div\u003e\n\u003ch2 class=\"cnc-h2\"\u003e4. Core Industrial Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe DTGNL2525M16 left-hand configuration combined with a heavy 25mm footprint is custom-engineered for **Sub-Spindle Back-Turning**, **Large-Diameter Reverse Outer Diameter Profiling**, and **Heavy Face Turning** from the center line outward. The 91-degree tool geometry provides reliable relief when cutting perpendicular steps, ensuring the non-cutting edges of the TNMG insert never drag across the finished surface. This makes it an essential tool for large automotive shafts, industrial gear blanks, and multi-step threaded turbine components that require ultra-stable chip control.\u003c\/p\u003e\n\u003ch2 class=\"cnc-h2\"\u003e5. Machine Turret \u0026amp; Ancillary Equipment Compatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Lathe Tool Turrets:\u003c\/strong\u003e Mounts directly into standard 25mm square indexable CNC blocks, heavy-duty linear gang tool tables, quick-change tool posts (QCTP 300 CXA series), and multi-station high-torque turrets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Profile Configuration:\u003c\/strong\u003e Precision machined for standard $60^\\circ$ triangular double-sided negative inserts with a 4.76mm ($3\/16\"$) thickness, matching models like TNMG 160404, TNMG 160408, or TNMG 160412.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement Spares Matrix:\u003c\/strong\u003e Utilizes standard metric wedge components, internal dual-action lock pins, hardening clamp screws, and matching torx wrenches for fast setups.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"cnc-h2\"\u003e6. BEYOND Lathe Turning Tool Holder Series Comparison Matrix\u003c\/h2\u003e\n\u003cdiv class=\"cnc-table-wrapper\"\u003e\n\u003ctable class=\"cnc-data-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eTool Holder Code\u003c\/th\u003e\n\u003cth\u003eClamping Format\u003c\/th\u003e\n\u003cth\u003eApproach Angle Profile\u003c\/th\u003e\n\u003cth\u003ePrimary Advantage \u0026amp; Application Style\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDTGNL Series (Double Clamp)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTop Wedge + Pin Lock\u003c\/td\u003e\n\u003ctd\u003e91 Degrees Left Hand\u003c\/td\u003e\n\u003ctd\u003eHigh-rigidity left-hand profiling bar. Double clamp prevents insert rotation under load.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDTGNR Series (Double Clamp)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTop Wedge + Pin Lock\u003c\/td\u003e\n\u003ctd\u003e91 Degrees Right Hand\u003c\/td\u003e\n\u003ctd\u003eRight-hand tool for main spindle conventional turning and shoulder facing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWTJNL Series (Wedge Lock)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTop Lever Wedge Style\u003c\/td\u003e\n\u003ctd\u003e93 Degrees Approach\u003c\/td\u003e\n\u003ctd\u003eProvides higher relief angles for delicate finishing and complex profile passes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2 class=\"cnc-h2\"\u003e7. Why Choose BEYOND Professional Turning Solutions\u003c\/h2\u003e\n\u003cp\u003eBEYOND uses premium heat-treated alloy steel shanks to ensure exceptional dimensional accuracy and pocket longevity. Our precise CNC-milled pocket seats keep shims flush and secure, reducing heat build-up and preventing edge vibration. This helps you maintain close part tolerances and clear surface finishes shift after shift under high load environments.\u003c\/p\u003e\n\u003cdiv class=\"cnc-review-grid\"\u003e\n\u003cdiv class=\"cnc-review-card\"\u003e\n\u003cdiv class=\"cnc-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Incredible Rigidity for Large Diameter Profiling\"\u003c\/strong\u003e\n\u003cp\u003eUpgraded to the 25mm DTGNL2525M16 for back-profiling operations on our large shaft runs. The double clamping setup locks down the TNMG 1604 insert perfectly. Micro-vibration and edge chipping are completely gone.\u003c\/p\u003e\n\u003cdiv class=\"cnc-review-meta\"\u003eMarcus D. | Ohio, USA\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-review-card\"\u003e\n\u003cdiv class=\"cnc-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität und Plattensitzgenauigkeit\"\u003c\/strong\u003e\n\u003cp\u003eSehr robuster linker Drehmeißelhalter mit perfektem 25x25mm Schaft. Der D-Type Doppelklemmungs-Mechanismus zieht die TNMG-Platte bombenfest in den Sitz. Absolut prozesssicher bei schweren Schnitttiefen.\u003c\/p\u003e\n\u003cdiv class=\"cnc-review-meta\"\u003eJürgen S. | Stuttgart, Germany\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-review-card\"\u003e\n\u003cdiv class=\"cnc-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Rigidità assoluta su sgrossatura pesante\"\u003c\/strong\u003e\n\u003cp\u003eOttimo utensile sinistro da 25mm. La staffa e il perno bloccano l'inserto TNMG 1604 senza alcun gioco, eliminando vibrazioni anche durante passate di sbucciatura crosta su acciaio forgiato.\u003c\/p\u003e\n\u003cdiv class=\"cnc-review-meta\"\u003eGiovanni F. | Torino, Italy\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-review-card\"\u003e\n\u003cdiv class=\"cnc-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"大径重切削で抜群の安定感\"\u003c\/strong\u003e\n\u003cp\u003e25mm角の剛性とダブルクランプの保持力が素晴らしく、TNMG1604チップを強固に固定します。逆勝手の倣い荒加工でも刃先がびびらず、寸法精度が完全に安定しました。\u003c\/p\u003e\n\u003cdiv class=\"cnc-review-meta\"\u003eHideo M. | Yokohama, Japan\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-review-card\"\u003e\n\u003cdiv class=\"cnc-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Solid Bar Body, Excellent Tolerances\"\u003c\/strong\u003e\n\u003cp\u003ePocket ground nicely flat with zero seat rock. Runs standard TNMG 332 inserts perfectly. Highly recommended for any production shop needing clean, continuous left-hand stepped profiles.\u003c\/p\u003e\n\u003cdiv class=\"cnc-review-meta\"\u003eDavid L. | Queensland, Australia\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 class=\"cnc-h2\"\u003e8. Frequently Asked Questions (AI-Style Machinist Reference)\u003c\/h2\u003e\n\u003cdiv class=\"cnc-faq-item\"\u003e\n\u003cdiv class=\"cnc-faq-q\"\u003eQ1: What are the main benefits of a D-Type double clamp over an S-Type screw-down system on a 25mm shank?\u003c\/div\u003e\n\u003cdiv class=\"cnc-faq-a\"\u003eA1: On a large 25mm shank meant for heavy loads, a D-Type double clamp utilizes both a top wedge and an internal pin to lock the insert simultaneously. This setup provides up to twice the clamping rigidity of an S-Type single screw, which can allow the insert to pivot or lift under heavy roughing forces.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-faq-item\"\u003e\n\u003cdiv class=\"cnc-faq-q\"\u003eQ2: Can I use this left-hand (DTGNL) holder on a standard right-hand tool post setup?\u003c\/div\u003e\n\u003cdiv class=\"cnc-faq-a\"\u003eA2: Yes, but you must reverse your spindle rotation (M04 instead of M03) or flip the holder upside down if mounting it on a conventional front-tool post layout, depending on your machine's turret configuration.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-faq-item\"\u003e\n\u003cdiv class=\"cnc-faq-q\"\u003eQ3: How do I choose the correct chipbreaker profile for this holder's TNMG inserts?\u003c\/div\u003e\n\u003cdiv class=\"cnc-faq-a\"\u003eA3: Match the chipbreaker to your depth of cut and feed rate. Choose a medium \"TM\" or roughing \"HR\" style geometry for thick, broken chips during heavy stock removal, and a fine \"LQ\" profile for clean chip control during light finish passes.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-dark-box\"\u003e\n\u003ch3\u003e⚙️ Industry Reference Index \u0026amp; Advanced Troubleshooting Tips\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Industry Cross-Reference:\u003c\/strong\u003e This premium 25x25mm tool shank acts as a direct technical alternative to common standard codes including: Seco DTGNL2525M16, Sandvik DTGNL 2525M 16, Iscar DTGNL 2525M-16, and Kennametal DTGNL2525M16 turning accessories.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Flank Friction \u0026amp; Surface Scouring:\u003c\/strong\u003e Because a 91-degree approach angle runs very close to a true vertical flank transition, running incorrect tool center line values can cause the trailing $60^\\circ$ insert edge to drag or rub against the raw material. If you notice structural tool chatter or localized tearing lines across your finish profiles, check your tool post center height with a master dial indicator. Running too far above center minimizes clearance angles and causes flank rubbing, while running below center height spikes edge friction and causes indexable insert breakage. Always clear away stringy chips using high-pressure coolant to prevent them from nesting around the double-clamp assembly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43691271585964,"sku":"DTGNL2525M16","price":40.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_DTGNL2525M16_left_hand_external_turning_tool_holder_with_rigid_double_clamp_mechanism_for_CNC_lathes.jpg?v=1782807870","url":"https:\/\/cnchome-beyond.com\/products\/beyond-dtgnl2525m16-left-hand-turning-tool-holder","provider":"CNCHome-Beyond","version":"1.0","type":"link"}