{"id":4568,"date":"2026-05-31T16:31:00","date_gmt":"2026-05-31T08:31:00","guid":{"rendered":"https:\/\/www.graphitecutting.com\/?p=4568"},"modified":"2026-10-08T13:00:25","modified_gmt":"2026-10-08T05:00:25","slug":"aplanamiento-de-corte-de-grafito-paralelismo","status":"publish","type":"post","link":"https:\/\/www.graphitecutting.com\/es\/graphite-slicing-flatness-parallelism\/","title":{"rendered":"Planitud y paralelismo en el corte de grafito: por qu\u00e9 la geometr\u00eda importa tanto como el grosor"},"content":{"rendered":"<p class=\"wp-block-paragraph\">A graphite plate can hit the target thickness perfectly \u2014 5.00 mm at every measurement point \u2014 and still be unusable. How? If the plate is bowed, cupped, or wedge-shaped, it won\u2019t sit flat on a mating surface. Downstream assembly fails, thermal contact degrades, and the plate gets rejected.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Graphite slicing flatness and parallelism are the geometric quality metrics that determine whether a sliced plate actually functions in its intended application. Thickness tells you how thick the plate is. Flatness tells you whether the surfaces are planar. Parallelism tells you whether the two surfaces are equidistant at every point.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This article covers what causes flatness and parallelism errors in graphite slicing, how to measure them, and how to minimize them at the cutting stage.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"413\" height=\"413\" src=\"https:\/\/www.graphitecutting.com\/wp-content\/uploads\/2025\/05\/Graphite-cut-wire-saw2.webp\" alt=\"Sierra de alambre con corte de grafito\" class=\"wp-image-4186\" title=\"Soluci\u00f3n de corte de grafito\" srcset=\"https:\/\/www.graphitecutting.com\/wp-content\/uploads\/2025\/05\/Graphite-cut-wire-saw2.webp 413w, https:\/\/www.graphitecutting.com\/wp-content\/uploads\/2025\/05\/Graphite-cut-wire-saw2-300x300.webp 300w, https:\/\/www.graphitecutting.com\/wp-content\/uploads\/2025\/05\/Graphite-cut-wire-saw2-150x150.webp 150w, https:\/\/www.graphitecutting.com\/wp-content\/uploads\/2025\/05\/Graphite-cut-wire-saw2-12x12.webp 12w, https:\/\/www.graphitecutting.com\/wp-content\/uploads\/2025\/05\/Graphite-cut-wire-saw2-100x100.webp 100w\" sizes=\"(max-width: 413px) 100vw, 413px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Graphite Slicing Flatness vs. Parallelism: Definitions<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">These two terms are related but measure different things:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Flatness<\/strong> is the deviation of a single surface from a perfect plane. A flatness of 0.02 mm means the entire surface falls within a 0.02 mm thick zone between two parallel planes. It describes how \u201cwavy\u201d or \u201cbowed\u201d one face of the plate is.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Parallelism<\/strong> is the deviation between two opposing surfaces. A parallelism of 0.05 mm means the maximum thickness difference between any two points on the plate is 0.05 mm. It describes how \u201cwedge-shaped\u201d the plate is.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>M\u00e9trica<\/th><th>What It Measures<\/th><th>Specification Example<\/th><th>Impacto<\/th><\/tr><\/thead><tbody><tr><td>Flatness<\/td><td>Single surface planarity<\/td><td>\u2264 0.03 mm over 200 mm<\/td><td>Surface contact, sealing<\/td><\/tr><tr><td>Parallelism<\/td><td>Two-surface equidistance<\/td><td>\u2264 0.05 mm over 200 mm<\/td><td>Stack compression, thermal transfer<\/td><\/tr><tr><td>TTV<\/td><td>Total thickness variation<\/td><td>\u2264 0.05 mm<\/td><td>Combines parallelism + local variation<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A plate with good parallelism can still have poor flatness \u2014 both surfaces might be equally curved. And a plate with good flatness on each face can still have poor parallelism if one face was cut at a slight angle to the other.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why Graphite Slicing Flatness Matters by Application<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Different applications have different tolerance requirements:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Fuel Cell Bipolar Plates<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Bipolar plates are stacked in compression. If a plate isn\u2019t flat, the gasket doesn\u2019t seal uniformly. If parallelism is off, the compression pressure concentrates on the thicker side, creating uneven contact resistance across the cell. According to the <a href=\"https:\/\/www.energy.gov\/eere\/fuelcells\/fuel-cells\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">U.S. Department of Energy<\/a>, bipolar plates account for a significant portion of fuel cell stack cost \u2014 geometric rejects directly increase manufacturing cost per kilowatt.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Typical requirement: flatness \u2264 0.03 mm, parallelism \u2264 0.05 mm.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Piezas en bruto para electrodos de EDM<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">An EDM electrode must be mounted perpendicular to the workpiece. A non-flat electrode base means the electrode sits at an angle in the holder, transferring that angular error to the machined cavity. For precision mold work, this is unacceptable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Typical requirement: flatness \u2264 0.05 mm, parallelism \u2264 0.08 mm.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Semiconductor Process Components<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Wafer chucks, susceptors, and heating elements transfer their surface geometry to the wafer or substrate. A non-flat chuck produces a non-flat wafer \u2014 the geometry propagates through the entire process. Leading semiconductor equipment manufacturers specify flatness requirements on graphite components in the range of 0.01\u20130.02 mm.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Typical requirement: flatness \u2264 0.02 mm, parallelism \u2264 0.03 mm.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Causes Flatness Errors in Graphite Slicing<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. Wire Bow During Cutting<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The most common cause of flatness problems. As the diamond wire cuts through the graphite block, cutting resistance pushes the wire backward (opposite to feed direction). The wire bows, and the cut surface is not a perfect plane \u2014 it\u2019s a slightly concave curve.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The degree of bow depends on:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Velocidad de avance<\/strong> \u2014 higher feed = more force = more bow<\/li>\n\n\n\n<li><strong>Wire tension<\/strong> \u2014 lower tension = more bow<\/li>\n\n\n\n<li><strong>Cut length<\/strong> \u2014 longer span = more potential deflection<\/li>\n\n\n\n<li><strong>Di\u00e1metro del cable<\/strong> \u2014 thinner wire is more flexible and bows more easily<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A 300 mm long cut at aggressive feed rates can produce a surface with 0.05\u20130.1 mm of concavity in the center. The wire essentially sags in the middle of the cut, cutting deeper there.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. Residual Stress Release<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Graphite blocks \u2014 especially extruded and molded grades \u2014 contain internal stress from the manufacturing process. When a slice is removed, the stress redistributes, and the plate can warp or bow after separation from the block.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Isostatic-pressed graphite has lower internal stress than extruded graphite, which is one reason it\u2019s preferred for precision applications. But even isostatic grades can exhibit measurable warpage in thin plates (&lt; 2 mm).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is a post-cutting phenomenon: the plate might measure flat on the machine immediately after cutting, then warp within hours as the stress equalizes.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Thermal Gradients During Cutting<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Friction generates heat at the wire-graphite interface. If the cooling is uneven \u2014 more coolant reaching one side of the cut than the other \u2014 the block expands asymmetrically. The wire follows the thermal distortion, cutting a surface that\u2019s flat at elevated temperature but not at room temperature.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This effect is worse on:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Long cuts (more time for heat to accumulate)<\/li>\n\n\n\n<li>Thick blocks (longer wire engagement = more total heat)<\/li>\n\n\n\n<li>Inadequate or poorly directed coolant flow<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">4. Machine Geometry Errors<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The wire saw itself contributes to flatness errors if its guide rollers, work table, or axis alignment is off. These are systematic errors that affect every plate consistently:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Guide roller misalignment<\/strong> \u2014 the wire path is not a true plane, producing a twisted cut surface<\/li>\n\n\n\n<li><strong>Work table non-flatness<\/strong> \u2014 the block sits on a non-flat surface, so the reference is already wrong<\/li>\n\n\n\n<li><strong>Axis perpendicularity<\/strong> \u2014 the feed axis is not exactly perpendicular to the wire plane<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Machine-related flatness errors are repeatable and can be identified by measuring multiple plates from the same setup. If all plates show the same flatness pattern (e.g., all are 0.03 mm higher on the left side), it\u2019s a machine geometry issue, not a process parameter issue.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Causes Parallelism Errors in Graphite Slicing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Parallelism errors come from different sources than flatness errors:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. Progressive Wire Wear<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">As the diamond wire wears during a cut sequence, its effective diameter decreases and cutting efficiency drops. The first cut and the last cut on a block may produce slightly different kerf widths and different amounts of wire deflection. If both faces of a plate are not cut simultaneously (as in single-wire sawing), the two cuts happen at different points in the wire\u2019s life \u2014 producing surfaces at slightly different angles.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. Block Tilt in Fixture<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If the graphite block is not mounted perfectly perpendicular to the wire plane, every cut produces a wedge-shaped plate. A tilt of just 0.01\u00b0 over a 200 mm plate length creates a parallelism error of about 0.035 mm \u2014 enough to fail most precision specifications.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Block fixturing is critical. Verify block perpendicularity to the wire plane before starting any cutting sequence.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Uneven Wire Tension<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If wire tension varies across the wire span \u2014 higher on one side, lower on the other \u2014 the wire deflects asymmetrically. The resulting cut surface tilts relative to the intended cutting plane, creating a wedge geometry.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is particularly relevant on machines with long wire spans or where the guide rollers are not at equal height.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"400\" height=\"282\" src=\"https:\/\/www.graphitecutting.com\/wp-content\/uploads\/2025\/04\/\u77f3\u58a8\u70ed\u573a-1.jpg\" alt=\"Graphite Heater Components cut wiresaw\" class=\"wp-image-3541\" title=\"Soluci\u00f3n de corte de grafito\" srcset=\"https:\/\/www.graphitecutting.com\/wp-content\/uploads\/2025\/04\/\u77f3\u58a8\u70ed\u573a-1.jpg 400w, https:\/\/www.graphitecutting.com\/wp-content\/uploads\/2025\/04\/\u77f3\u58a8\u70ed\u573a-1-300x212.jpg 300w, https:\/\/www.graphitecutting.com\/wp-content\/uploads\/2025\/04\/\u77f3\u58a8\u70ed\u573a-1-18x12.jpg 18w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How to Minimize Graphite Slicing Flatness and Parallelism Errors<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Optimize Wire Tension and Feed Rate<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">These are the two most effective levers. Higher wire tension reduces bow and deflection. Lower feed rate reduces cutting force. The optimal combination depends on your specific requirements:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Priority<\/th><th>Tensi\u00f3n del cable<\/th><th>Velocidad de alimentaci\u00f3n<\/th><th>Expected Flatness<\/th><\/tr><\/thead><tbody><tr><td>Maximum flatness<\/td><td>High (near wire limit)<\/td><td>Low (3\u20135 mm\/min)<\/td><td>\u2264 0.02 mm<\/td><\/tr><tr><td>Production balance<\/td><td>Medium-high<\/td><td>Medium (8\u201312 mm\/min)<\/td><td>0.03\u20130.05 mm<\/td><\/tr><tr><td>Maximum throughput<\/td><td>Medio<\/td><td>High (15\u201325 mm\/min)<\/td><td>0.05\u20130.1 mm<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">For fuel cell and semiconductor applications, accept the slower feed rate. The cost of grinding a non-flat plate far exceeds the cost of a longer cut time.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Use Servo-Controlled Tension Systems<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Manual tension adjustment cannot maintain consistent wire tension throughout a cut. Servo-controlled tension compensates for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wire stretch during cutting<\/li>\n\n\n\n<li>Thermal expansion of the wire<\/li>\n\n\n\n<li>Spool diameter changes as wire feeds from one spool to the other<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tensi\u00f3n constante = deflexi\u00f3n constante del alambre = planitud constante. Este es el mismo principio que mejora el control del grosor del corte de grafito; ambas m\u00e9tricas se benefician de la misma capacidad del equipo.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ensure Uniform Coolant Distribution<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Direct coolant nozzles to deliver equal flow to both sides of the wire at the entry and exit of the cut. Uneven cooling creates thermal asymmetry that distorts the cut surface.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For large blocks (&gt; 200 mm cut length), consider multiple coolant nozzles positioned along the wire path, not just at the entry point. The coolant that enters at one end of the cut may not reach the middle at sufficient volume.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Verify Machine Geometry Regularly<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Flatness problems that are consistent across all plates usually point to machine alignment:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Check guide roller alignment quarterly<\/li>\n\n\n\n<li>Verify work table flatness with a precision straight edge<\/li>\n\n\n\n<li>Confirm feed axis perpendicularity to the wire plane<\/li>\n\n\n\n<li>Document the results \u2014 gradual drift is harder to detect than sudden failure<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">Select Appropriate Graphite Grade<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">When flatness is critical, specify isostatic-pressed graphite with grain size &lt; 10 \u03bcm. These grades have lower internal stress, more uniform density, and better machinability than extruded or molded alternatives. <a href=\"https:\/\/www.entegris.com\/en\/home\/products\/specialty-materials\/specialty-graphite.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">POCO Graphite (Entegris)<\/a> and SGL Carbon both publish detailed grade specifications including internal stress data.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For thin plates (&lt; 2 mm) where post-cutting warpage is a risk, consider stress-relief annealing of the graphite block before slicing.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ejemplo medido: Planitud y conicidad en una barra de 500 mm<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Las causas anteriores son m\u00e1s f\u00e1ciles de sopesar frente a lecturas reales. En una prueba reciente, cortamos una barra de 2554 de grafito isost\u00e1tico de 500 \u00d7 87 \u00d7 70 mm de un bloque m\u00e1s grande en una Vimfun SVI250-80, utilizando alambre de 0,8 mm a 50 m\/s, 160 N de tensi\u00f3n y una velocidad de avance de 42 mm\/min. Este fue un corte de escuadrado de bloque, no un corte de l\u00e1mina delgada, pero se aplican las mismas reglas de geometr\u00eda.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Lectura<\/th><th>1<\/th><th>2<\/th><th>3<\/th><th>4<\/th><th>5<\/th><th>6<\/th><\/tr><\/thead><tbody><tr><td>Planitud a lo largo de una cara de 500 mm (mm)<\/td><td>0.01<\/td><td>0.02<\/td><td>0.02<\/td><td>0.03<\/td><td>0.02<\/td><td>0.02<\/td><\/tr><tr><td>Ancho a lo largo de la longitud, nominal 87 mm<\/td><td>87.00<\/td><td>87.10<\/td><td>87.20<\/td><td>87.20<\/td><td>87.30<\/td><td>87.30<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Planitud mantenida.<\/strong> Seis lecturas de reloj comparador a lo largo de una cara de corte de 500 mm se mantuvieron entre 0,01 y 0,03 mm. A una velocidad de avance moderada, la flexi\u00f3n del alambre no produjo la cara c\u00f3ncava descrita anteriormente.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>El paralelismo no lo hizo.<\/strong> El ancho aument\u00f3 constantemente de 87,00 a 87,30 mm de un extremo de la barra al otro, dejando las dos caras desalineadas 0,30 mm. La prueba se realiz\u00f3 con la compensaci\u00f3n del di\u00e1metro del alambre desactivada, y el resultado es el error de desgaste progresivo del alambre en la pr\u00e1ctica: una deriva unidireccional, no una dispersi\u00f3n aleatoria.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Los dos resultados juntos resumen el prop\u00f3sito de este art\u00edculo. Un corte puede ser plano a unas pocas cent\u00e9simas de mil\u00edmetro y aun as\u00ed ser c\u00f3nico, porque los dos errores tienen causas diferentes y requieren soluciones diferentes. Las lecturas completas, incluidas la escuadra y el espesor, se encuentran en nuestro <a href=\"https:\/\/www.graphitecutting.com\/es\/corte-de-bloque-de-grafito-isostatico\/\">corte de bloque de grafito isost\u00e1tico<\/a> informe de prueba.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Measuring Graphite Slicing Flatness and Parallelism<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>M\u00e9todo<\/th><th>Measures<\/th><th>Resolution<\/th><th>Lo mejor para<\/th><\/tr><\/thead><tbody><tr><td>Precision straight edge + feeler gauge<\/td><td>Flatness<\/td><td>0.01 mm<\/td><td>Quick shop-floor check<\/td><\/tr><tr><td>Dial indicator on surface plate<\/td><td>Flatness + parallelism<\/td><td>0.001 mm<\/td><td>Production inspection<\/td><\/tr><tr><td>CMM (coordinate measuring machine)<\/td><td>Both + full surface map<\/td><td>0.001 mm<\/td><td>Incoming inspection, documentation<\/td><\/tr><tr><td>Optical profilometer<\/td><td>Flatness (high detail)<\/td><td>0.0001 mm<\/td><td>R&amp;D, process development<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">For production environments, a dial indicator on a granite surface plate is the most practical combination of speed and accuracy. Measure flatness by placing the plate face-down on the surface plate, running the indicator across the top surface, and recording the total indicator reading (TIR). Flip the plate and repeat for the other face. The difference between TIR readings gives an indication of parallelism.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Connecting Flatness to the Full Slicing Quality Chain<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Graphite slicing flatness and parallelism sit in the middle of the quality chain:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><a href=\"https:\/\/www.graphitecutting.com\/es\/graphite-slicing-process\/\" target=\"_blank\" rel=\"noreferrer noopener\">Slicing process<\/a><\/strong> parameters determine initial geometry<\/li>\n\n\n\n<li><strong>Control del espesor<\/strong> ensures the plate hits target thickness \u2014 but a plate with good TTV can still have poor flatness if the wire bowed consistently<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/www.graphitecutting.com\/es\/graphite-slicing-defects\/\" target=\"_blank\" rel=\"noreferrer noopener\">Surface defects<\/a><\/strong> like edge chipping can reduce effective flatness at the plate boundary<\/li>\n\n\n\n<li><strong>Stress introduction<\/strong> during slicing can cause post-cutting warpage that ruins flatness after the plate leaves the machine<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For a complete view of how these quality factors interconnect, see our <a href=\"https:\/\/www.graphitecutting.com\/es\/corte-de-grafito-de-precision-2\/\" target=\"_blank\" rel=\"noreferrer noopener\">corte de grafito de precisi\u00f3n<\/a> pillar guide.<\/p>","protected":false},"excerpt":{"rendered":"<p>A graphite plate can hit the target thickness perfectly \u2014 5.00 mm at every measurement point \u2014 and still be unusable. How? If the plate is bowed, cupped, or wedge-shaped, it won&#8217;t sit flat on a mating surface. Downstream assembly fails, thermal contact degrades, and the plate gets rejected. Graphite slicing flatness and parallelism are [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4385,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[372],"tags":[280],"class_list":["post-4568","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-equipment-selection-comparisons","tag-graphite-wire-saw"],"_links":{"self":[{"href":"https:\/\/www.graphitecutting.com\/es\/wp-json\/wp\/v2\/posts\/4568","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.graphitecutting.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.graphitecutting.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.graphitecutting.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.graphitecutting.com\/es\/wp-json\/wp\/v2\/comments?post=4568"}],"version-history":[{"count":4,"href":"https:\/\/www.graphitecutting.com\/es\/wp-json\/wp\/v2\/posts\/4568\/revisions"}],"predecessor-version":[{"id":4859,"href":"https:\/\/www.graphitecutting.com\/es\/wp-json\/wp\/v2\/posts\/4568\/revisions\/4859"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.graphitecutting.com\/es\/wp-json\/wp\/v2\/media\/4385"}],"wp:attachment":[{"href":"https:\/\/www.graphitecutting.com\/es\/wp-json\/wp\/v2\/media?parent=4568"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.graphitecutting.com\/es\/wp-json\/wp\/v2\/categories?post=4568"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.graphitecutting.com\/es\/wp-json\/wp\/v2\/tags?post=4568"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}