{"product_id":"k873","title":"K873","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA direct replacement for the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eKongsberg BLD-TZ129 (42435636)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSumma 500-9825\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, and \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eZund Z73 (5005572)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, with no holder modification needed. Fine grain tungsten carbide V-cut blade for V-grooving, bevel cutting, and 0° through cutting on \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eKongsberg \/ Esko\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSumma\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, and \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eZund\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e flatbed cutting systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eDesigned for cutting PET felt, Zintra®, F-Sorb®, polyester acoustic board, foam board, honeycomb, corrugated board, and other display, packaging, and acoustic materials.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe K873 features an additional cutting edge that reduces the force required for the blade to enter the material. Lower entry force reduces blade deflection, producing a cleaner and more accurate start point at the beginning of the cut path.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eSold individually.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eDirect OEM replacement\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe K873 is a confirmed drop-in replacement for the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eKongsberg BLD-TZ129 (42435636)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSumma 500-9825\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, and \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eZünd Z73 (5005572)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. Same form, same fit, same mounting geometry. No holder changes required.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhat is V-cutting?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eV-cutting uses angled cuts to remove a wedge-shaped section from the material. This creates clean folds, beveled edges, and mitered joints in thick board, acoustic felt, and display materials.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eWhen installed at 0°, the blade can also make straight through cuts, depending on the tool, material, and machine settings. This blade is intended for V-cutting, bevel cutting, and through cutting. It is not a kiss-cut blade.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eFine grain tungsten carbide with an additional cutting edge\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe K873 is made from fine grain tungsten carbide for added strength, improved cut quality, and longer blade life. Its tight grain structure helps the blade retain a sharp edge and resist chipping under load. This means fewer blade changes and more consistent cut quality across longer production runs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe K873 also incorporates an additional cutting edge that reduces the force required as the blade enters the material. Lower entry force helps limit blade deflection during penetration, producing a cleaner and more accurate start point at the beginning of the programmed cut path.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis feature is especially valuable when processing dense PET acoustic felt, Zintra®, foam board, honeycomb, heavy corrugated board, and other materials that can push or deflect a conventional blade during entry.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eCommon questions\u003c\/span\u003e\u003c\/h3\u003e\n\u003ch4\u003e\u003cspan\u003eHow do I know this fits my machine?\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe K873 fits the following machine and tool configurations:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eZünd G3, S3, and D3\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e cutters equipped with the VCT1 and blade holder 5206262\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eZünd cutters equipped with the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eT75\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and V-cut insert 3102186\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eKongsberg XL, XN, X, and V\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e cutters equipped with a PowerHead and V-Notch tool holder\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eKongsberg C and XP\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e cutters equipped with an HD or Dual HD unit and V-Notch tool holder\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eSumma F Series\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e cutters equipped with a V-Cut Tool installed in the Tangential Module\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIf your current blade is the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBLD-TZ129\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e500-9825\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, or \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eZ73\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, the K873 is a confirmed drop-in replacement. Not sure which blade or holder is installed? Contact us before ordering and we will confirm compatibility.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003eWhat is the advantage of the additional cutting edge?\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe additional cutting edge reduces the force required for the blade to penetrate the material. This helps prevent the blade from flexing or deflecting as the cut begins.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eLess deflection produces a more accurate start point, cleaner cut-path entry, and more consistent results, particularly in dense PET felt, acoustic panels, foam, and thick structural board.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003eWhy use tungsten carbide instead of HSS?\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFine grain tungsten carbide offers greater strength, edge retention, and wear resistance than a conventional high-speed steel blade. It stays sharp longer, maintains more consistent cut quality, and reduces the frequency of blade changes during production.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThese benefits are especially valuable when cutting abrasive PET acoustic felt, Zintra®, F-Sorb®, polyester acoustic board, and other fiber-based materials that can wear an HSS blade quickly.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eCombined with the K873’s additional cutting edge, the carbide construction provides longer blade life, lower material-entry force, reduced blade deflection, and a cleaner start point.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eActual blade life depends on the material, cutting depth, speed, tool calibration, and machine condition.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003eWhat materials does it cut?\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe K873 is recommended for a wide range of acoustic, foam, display, packaging, and corrugated materials, including:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eAcoustic materials:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e PET felt, Zintra®, F-Sorb®, PET acoustic felt, and polyester acoustic board\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eFoam and flexible materials:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e EVA foam, ethylene-vinyl acetate, neoprene, foam, and cork\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eFoam boards:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Foamboard, FOME-COR®, and Insite foamboard\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eDisplay and structural boards:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Falconboard®, Reboard®, Zanita Board®, sandwich board, and DISPA®\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCorrugated materials:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e B flute, C flute, E flute, F flute, BC flute, and other corrugated board\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eOther sheet materials:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Corrugated plastic, matboard, cardstock, and cardboard\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIf you are cutting something outside this list or need help matching the blade to your material, reach out. We have probably seen the application before.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003eWhat cutting depth can it handle?\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe blade format supports cutting depths up to approximately 18.2 mm, depending on the machine, tool, holder, cutting angle, and material density. The Zünd VCT1 is designed for materials up to 16 mm thick, while other compatible configurations may allow additional cutting depth.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eAlways set the blade exposure for the material being processed. Excessive exposure can increase deflection, reduce cut quality, and shorten blade life.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003eHow do I know when to replace it?\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eWatch the cut quality. If beveled edges become rough, the blade begins dragging through the material, fibers pull instead of separating cleanly, corners start tearing, or pieces no longer release properly, it is time to replace the blade. Edge degradation usually appears in cut quality before the blade fails completely.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eGetting the most from your cutting table\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA fresh blade is a good start. But if you are going through blades faster than expected, or cut quality has become inconsistent, the blade is rarely the whole story. Blade exposure, cutting angle, speed, depth, material hold-down, and machine condition all affect blade life and finished cut quality.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIt is worth asking: When was your machine last serviced? Are your parameters dialed in for this material? Is the V-cut tool calibrated correctly? Is this the right blade geometry for what you are cutting? Could your operators use time with someone who runs these machines every day?\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFlatbed Tools offers machine service, preventive maintenance, operator training, and workflow consulting. If something is not cutting right, reach out. We have probably seen it before.\u003c\/span\u003e\u003c\/p\u003e","brand":"Flatbed Tools","offers":[{"title":"Default Title","offer_id":44056985239596,"sku":"650873","price":44.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/5259\/4988\/files\/K873_carbide_V-cut_blade_ISO_View.png?v=1786381384","url":"https:\/\/flatbedtools.com\/products\/k873","provider":"Flatbed Tools","version":"1.0","type":"link"}