{"id":2601,"date":"2026-10-12T12:09:55","date_gmt":"2026-10-12T12:09:55","guid":{"rendered":"https:\/\/www.diecastingschina.com\/"},"modified":"2026-10-12T12:09:57","modified_gmt":"2026-10-12T12:09:57","slug":"toleranta-la-turnarea-sub-presiune-a-aluminiului","status":"publish","type":"post","link":"https:\/\/www.diecastingschina.com\/ro\/toleranta-la-turnarea-sub-presiune-a-aluminiului\/","title":{"rendered":"Care este toleran\u021ba la turnarea sub presiune a aluminiului?"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Introducere<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vorbind despre <a href=\"https:\/\/aludiecasting.com\/aluminum-die-casting\/\" target=\"_blank\" rel=\"noopener\">turnare sub presiune a aluminiului<\/a> Discu\u021bia despre toleran\u021be este probabil cea mai fructuoas\u0103 conversa\u021bie pe care o po\u021bi avea \u00een lumea produc\u021biei de precizie. Dac\u0103 e\u0219ti un inginer care a pus vreodat\u0103 un desen tehnic pe o ma\u0219in\u0103 de turnare sub presiune cu men\u021biunea \u201c\u00b10,02 mm peste tot\u201d, \u021bi s-a spus cam acela\u0219i lucru cel pu\u021bin o dat\u0103.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/1-3-1024x576.jpg\" alt=\"\" class=\"wp-image-2602\" srcset=\"https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/1-3-1024x576.jpg 1024w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/1-3-300x169.jpg 300w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/1-3-768x432.jpg 768w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/1-3-1536x864.jpg 1536w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/1-3-18x10.jpg 18w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/1-3.jpg 1920w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Turnarea sub presiune a aluminiului este \u00eenc\u0103 limitat\u0103, \u00een esen\u021b\u0103, de legile fizicii care guverneaz\u0103 solidificarea metalului topit sub presiune ridicat\u0103 \u00eentr-o matri\u021b\u0103 din o\u021bel; totu\u0219i, aceast\u0103 tehnologie asigur\u0103 ritmuri ridicate de produc\u021bie, o consisten\u021b\u0103 dimensional\u0103 excep\u021bional\u0103 \u0219i o finisare excelent\u0103 a suprafe\u021bei. Cunoa\u0219terea capacit\u0103\u021bii reale a unei piese turnate din aluminiu, atunci c\u00e2nd este necesar\u0103 prelucrarea secundar\u0103, precum \u0219i a modului \u00een care cerin\u021bele industriale, precum NADCA \u0219i ISO 8062-3, definesc aceste limite, face diferen\u021ba \u00eentre piesele rentabile \u0219i cele problematice \u0219i costisitoare.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Acest articol v\u0103 ofer\u0103:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Un ghid de referin\u021b\u0103 u\u0219or de \u00een\u021beles, bazat pe cifre, privind toleran\u021bele \u00een turnarea sub presiune a aluminiului.<\/li>\n\n\n\n<li>Acesta con\u021bine informa\u021bii privind capacit\u0103\u021bile reale ale tehnologiei moderne de turnare sub presiune.<\/li>\n\n\n\n<li>Diferen\u021ba dintre calit\u0103\u021bile standard \u0219i cele de precizie.<\/li>\n\n\n\n<li>Efectul geometriei pieselor \u0219i al variabilelor de proces.<\/li>\n\n\n\n<li>Elementele care sunt practic \u00eentotdeauna supuse prelucr\u0103rii mecanice \u0219i specificarea corect\u0103 a toleran\u021belor pe un desen al piesei turnate.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Informa\u021biile de mai jos v\u0103 vor ajuta s\u0103 stabili\u021bi cerin\u021bele pentru carcasa cutiei de viteze, carcasa electronic\u0103 sau piesa structural\u0103 auto pe care o proiecta\u021bi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ce greutate poate suporta, \u00een mod realist, aluminiul turnat \u00een stare brut\u0103<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.diecastingschina.com\/ro\">Turnare sub presiune<\/a> este un proces care const\u0103 \u00een injectarea aluminiului topit, la viteze \u0219i presiuni ridicate, \u00eentr-o matri\u021b\u0103 din o\u021bel c\u0103lit. Metalul se contract\u0103 pe m\u0103sur\u0103 ce se solidific\u0103 \u0219i se r\u0103ce\u0219te. Aceast\u0103 contrac\u021bie, \u00eempreun\u0103 cu limit\u0103rile mecanice ale <a href=\"https:\/\/www.plasticmold.net\/die-casting-moulds\/\" target=\"_blank\" rel=\"noopener\">matri\u021b\u0103<\/a>, pozi\u021bia liniei de separare \u0219i uniformitatea grosimii peretelui determin\u0103 cele mai mici toleran\u021be care pot fi respectate la ie\u0219irea din matri\u021b\u0103.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00cen continuare sunt prezentate toleran\u021bele tipice de prelucrare pentru liniile de produc\u021bie obi\u0219nuite ale aliajelor de aluminiu A380 \u0219i ADC12:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Dimensiunea caracteristic\u0103<\/strong><\/td><td><strong>Toleran\u021b\u0103 tipic\u0103 la starea de turnare<\/strong><\/td><td><strong>Scenariul optim (control riguros al procesului)<\/strong><\/td><\/tr><\/thead><tbody><tr><td>P\u00e2n\u0103 la 25 mm<\/td><td>\u00b10,10 mm<\/td><td>\u00b10,07 mm<\/td><\/tr><tr><td>25 \u2013 100 mm<\/td><td>\u00b10,15 mm<\/td><td>\u00b10,10 mm<\/td><\/tr><tr><td>100 \u2013 250 mm<\/td><td>\u00b10,25 mm<\/td><td>\u00b10,18 mm<\/td><\/tr><tr><td>250 \u2013 500 mm<\/td><td>\u00b10,35 mm<\/td><td>\u00b10,25 mm<\/td><\/tr><tr><td>G\u0103uri\/pini centrali (diametru)<\/td><td>\u00b10,10 mm<\/td><td>\u00b10,07 mm<\/td><\/tr><tr><td>Planitate pe 100 mm<\/td><td>\u00b10,20 mm<\/td><td>\u00b10,10 mm, cu un proiect corespunz\u0103tor al matri\u021bei<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Pl\u0103cile \u0219i carotele sunt utilizate pentru a crea dimensiuni care se extind peste linia de separare, c\u0103rora li se adaug\u0103 o marj\u0103 suplimentar\u0103. Cifrele variaz\u0103 cel mai mult din cauza a trei factori:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Distan\u021ba dintre linia de separare \u0219i zon\u0103<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Caracteristicile care se suprapun asupra ambelor p\u0103r\u021bi ale <a href=\"https:\/\/www.plasticmold.net\/die-casting-moulds\/\" target=\"_blank\" rel=\"noopener\">matri\u021b\u0103<\/a> s\u0103 aib\u0103 o raz\u0103 de ac\u021biune mai mare. Pe c\u00e2t posibil, suprafe\u021bele critice plane sau de etan\u0219are ar trebui s\u0103 se afle pe o singur\u0103 parte a matri\u021bei.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Uniformitatea grosimii peretelui<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">O turnare cu varia\u021bie brusc\u0103, \u00een care grosimea de 2 mm se transform\u0103 brusc \u00een 6 mm, va fi supus\u0103 unor for\u021be de tragere \u0219i se va deforma pe m\u0103sur\u0103 ce se r\u0103ce\u0219te. Cerin\u021ba privind uniformitatea pere\u021bilor nu este o preferin\u021b\u0103 de proiectare, ci o cerin\u021b\u0103 necesar\u0103 pentru a se \u00eencadra \u00een limita inferioar\u0103 a intervalelor de toleran\u021b\u0103.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Alegerea aliajului<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Aliajele care con\u021bin siliciu prezint\u0103 o contrac\u021bie mai uniform\u0103 dec\u00e2t alte aliaje, fie ele mai moi sau mai rezistente. Atunci c\u00e2nd un proiect conceput pentru un produs prelucrat din aliaj 6061 este adaptat pentru turnarea sub presiune, sec\u021biunea referitoare la toleran\u021be va trebui aproape \u00eentotdeauna revizuit\u0103.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/5-1-1024x576.jpg\" alt=\"\" class=\"wp-image-2603\" srcset=\"https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/5-1-1024x576.jpg 1024w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/5-1-300x169.jpg 300w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/5-1-768x432.jpg 768w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/5-1-18x10.jpg 18w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/5-1-1536x864.jpg 1536w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/5-1.jpg 1920w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Standardele NADCA \u0219i ISO: Toleran\u021be pentru turnarea sub presiune a aluminiului<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Exist\u0103 dou\u0103 standarde principale care se bucur\u0103 de cea mai mare popularitate: standardele de specifica\u021bii ale produselor ale Asocia\u021biei Nord-Americane de Turnare sub Presiune (NADCA) \u0219i standardul ISO 8062-3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Diferen\u021ba dintre standardul NADCA \u0219i toleran\u021bele de precizie<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Exist\u0103 dou\u0103 niveluri practice oferite de NADCA.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Toleran\u021ba standard este toleran\u021ba pe care un turn\u0103tor competent este capabil s\u0103 o men\u021bin\u0103 la viteza maxim\u0103 de produc\u021bie, asigur\u00e2nd o durat\u0103 de via\u021b\u0103 rezonabil\u0103 a matri\u021bei \u0219i o inspec\u021bie normal\u0103.<\/li>\n\n\n\n<li>Toleran\u021ba de precizie este o band\u0103 de toleran\u021b\u0103 mai restr\u00e2ns\u0103, utilizat\u0103 exclusiv pentru elemente a c\u0103ror form\u0103, potrivire sau func\u021bie este sensibil\u0103 la toleran\u021be mici.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Varianta standard are cel mai mic cost \u0219i se potrive\u0219te pentru majoritatea aplica\u021biilor. O caracteristic\u0103 de precizie convenit\u0103, selectat\u0103 \u00eenc\u0103 din primele etape, poate fi uneori realizat\u0103 cu doar o cheltuial\u0103 suplimentar\u0103 moderat\u0103.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pentru dimensiunile liniare, adaosurile la linia de separare, adaosurile la glisier\u0103\/miez, unghiularitatea, \u00eenclina\u021bia, planeitatea \u0219i diametrele g\u0103urilor cu miez sunt furnizate at\u00e2t valori standard, c\u00e2t \u0219i valori de precizie. Pentru concentricitate \u0219i deplasarea liniei de separare se indic\u0103 o valoare standard.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">The casting tolerance grades are defined in ISO 8062-3<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Castings are graded according to ISO 8062-3 from DCTG 1 (finest) to DCTG 16 (coarsest). The recommended grade varies for aluminum and magnesium <a href=\"https:\/\/aludiecasting.com\/?s=pressure+die+casting\" target=\"_blank\" rel=\"noopener\">pressure die castings<\/a>, depending on the largest overall dimension of the part:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Largest Overall Dimension<\/strong><\/td><td><strong>Recommended Grade (Aluminum &amp; Magnesium)<\/strong><\/td><\/tr><\/thead><tbody><tr><td>Up to 50 mm<\/td><td>DCTG 6<\/td><\/tr><tr><td>Over 50 mm up to 180 mm<\/td><td>DCTG 7<\/td><\/tr><tr><td>Over 180 mm up to 500 mm<\/td><td>DCTG 8<\/td><\/tr><tr><td>Over 500 mm<\/td><td>DCTG 9<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">These grades are based on a reasonably long production run and a developed process. Complex geometries are typically quoted one grade lower. The wall thicknesses are assumed to be one grade thicker than the general linear tolerance. Total values for the tolerances of these grades are higher with increasing nominal size: a feature of 100\u2013160 mm at DCTG 8 has a total tolerance of 1.8 mm (\u00b10.9 mm).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ISO does not use a plus-only parting-line adder as NADCA does. Explicitly specify an asymmetric tolerance on the dimension if a greater tolerance is required in one direction than the other.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/3-2-1024x576.jpg\" alt=\"\" class=\"wp-image-2606\" srcset=\"https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/3-2-1024x576.jpg 1024w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/3-2-300x169.jpg 300w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/3-2-768x432.jpg 768w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/3-2-1536x864.jpg 1536w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/3-2-18x10.jpg 18w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/3-2.jpg 1920w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Features for Post-Casting Machining: Essential<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Some of these characteristics can only be maintained to the necessary precision if the process is controlled carefully, but not if the casting is done as cast:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Precision bores and bearing seats. Generally, anything that a bearing or seal rides on requires \u00b10.02 to \u00b10.05 mm. A tolerance of 0.3 to 0.8 mm of stock should be planned for machining.<\/li>\n\n\n\n<li>Flat sealing faces. A facing pass is almost always applied to gasket and O-ring surfaces.<\/li>\n\n\n\n<li>The following M6 threads are tapped. Small threads can be cut or formed after being cast; larger cast-in threads are possible.<\/li>\n\n\n\n<li>Concentricity (or true-position relationships) smaller than about \u00b1 0.03 mm. These features should be machined in a single set up from the same datum.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">To allow intentional machining stock in just those faces to allow the finishing operation to remove clean metal and not engage residual warp or shrinkage variation in the mold.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Tolerances on a Casting Drawing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">There are four practical rules to be followed in making drawings:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Tightly mark the functional faces. Precision or individual tolerances are applied to bearing seats, sealing faces, mating threads, and alignment features.<\/li>\n\n\n\n<li>Allow surfaces that don&#8217;t perform a function to breathe. As cast tolerances on non-critical dimensions are standard, they also come without additional cost and do not restrict the process.<\/li>\n\n\n\n<li>Prefer GD&amp;T for positional relationships. It is a straightforward callout and much easier for a supplier to quote and check than a pile of bilateral linear tolerances.<\/li>\n\n\n\n<li>Explicitly identify which faces will be machined. The caster can then form the proper stock allowance during the forming process.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">A general tolerance note in or adjacent to the title block should refer to either NADCA Section 4A (Standard or Precision) or ISO 8062-3 and the relevant DCTG grade. Individual tighter tolerances are specified only where needed to override the general note.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/2-1-1024x576.jpg\" alt=\"\" class=\"wp-image-2604\" srcset=\"https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/2-1-1024x576.jpg 1024w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/2-1-300x169.jpg 300w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/2-1-768x432.jpg 768w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/2-1-18x10.jpg 18w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/2-1-1536x864.jpg 1536w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/2-1.jpg 1920w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Factors That Limit Achievable Tolerance<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">However, many physical and process factors limit the amount that can be stored even in the published tables:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Part size and shape<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">These are the most challenging and are usually large, thin-walled, or abrupt changes in wall thickness.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Wear and alignment of the dies<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A gradual increase in the amount of shifting occurs between the two halves over the life of the tool.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Clamping force<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">When the machine size is not adequate for the area to be produced, the die will open up a little bit under the injection pressure, creating some variation in each of the dimensions that cross the parting line.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Shrinkage properties and solidification of alloys<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Final dimensions are affected by process parameters such as metal temperature, velocity profile, die temperature, and cycle timing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If a tolerance is required that is more precise than the NADCA precision for the feature length or the corresponding ISO for the feature length, the economical answer is nearly always to cast with stock and machine the feature.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Methods of Quality Control for ensuring Tolerance Capability<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Today&#8217;s modern <a href=\"https:\/\/aludiecasting.com\/aluminum-die-casting\/\" target=\"_blank\" rel=\"noopener\">aluminiu turnat sub presiune<\/a> facilities incorporate conventional gauging with modern non-destructive techniques and statistical process control. Coordinate measuring machines are used to check first articles and, on a sample basis, critical dimensions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, if internal porosity or cold shut is found during real-time X-ray or, if warranted by the situation, during on-line CT, it can be a sign of an integrity issue even if the external dimensional tolerances are met. Key process variables and capability keys are tracked using statistical process control to ensure that the process is corrected before parts are out of specification.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ppk is sometimes needed to be greater than 1.67 at PPAP for critical characteristics. Since new dies are designed with intentional tolerances for wear, so that the dimensions are closer to the nominal, NAO (as-cast) is more applicable to assess the feature using Cp rather than Cpk.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Practical Guidelines for Designers and Procurement Teams<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Whenever possible, keep all main datums in one die half and off slides. Dimensions measured from a datum in the opposite half automatically pick up parting-line and shift adders.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use a draft early (usually of 1-3\u00b0 depending on draft depth) to prevent distortion of the part by the ejection force.<\/li>\n\n\n\n<li>Select alloys that have a known shrinkage, if close as-cast tolerances are needed.<\/li>\n\n\n\n<li>Communicate with the caster at the design phase about parting line, draft, datum scheme, and the features that will be machined.<\/li>\n\n\n\n<li><strong>Machining stock<\/strong>: 0.3 to 0.8 mm is left for most aluminum components 100 \u2013 300 mm in size. The volume of stock should not be too high, or it wastes material and cycle time, nor too low, or the cleanup will not be complete.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>The functional requirements and cost, all considered, can be met with aluminum die castings, routinely, using these practices.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/4-3-1024x576.jpg\" alt=\"\" class=\"wp-image-2605\" srcset=\"https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/4-3-1024x576.jpg 1024w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/4-3-300x169.jpg 300w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/4-3-768x432.jpg 768w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/4-3-1536x864.jpg 1536w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/4-3-18x10.jpg 18w, https:\/\/www.diecastingschina.com\/wp-content\/uploads\/2026\/10\/4-3.jpg 1920w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u00centreb\u0103ri frecvente<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">What are the common tolerances for the aluminum die casting?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Under normal production conditions, the as-cast linear tolerances of aluminum are normally \u00b10.10 mm for a value below 25 mm, and \u00b10.25\u20130.35 mm for a value larger than 25 mm. The formal reference is provided by NADCA Standard or Precision tables or ISO 8062-3 tables (DCTG 6\u20139 if overall part size).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Is it possible to die cast aluminum?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yes. Aluminum is one of the most commonly die-cast metals in the world. A380, ADC12, and A356 are among the many alloys commonly used on both hot-chamber (less common for aluminum) and cold-chamber high-pressure die casting machines. They create complex geometries, thin walls, excellent surface finish, and high production rates for automotive, electronics, industrial, and consumer applications.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Can 6061 aluminum be used for casting?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">6061 is a very good wrought alloy, and not a desirable alloy for die casting. It is not as well suited for high-pressure die casting as the dedicated casting alloys, A380 or ADC12, because of its solidification properties, fluidity, and shrinkage. The mechanical property specifications for the material of the original design are nearly always different when the design is transferred to die casting, and it is also frequently necessary to change the tolerances on the material.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What are the normal tolerances of aluminum?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">In regard to die casting, but outside of the specific process, the term \u201cstandard tolerances for aluminum\u201d can apply to a number of processes (extrusion, machining, sheet metal, etc.). In high-pressure die casting, the relevant standards are the NADCA Product Specification Standards (Section 4A) and ISO 8062-3. The typical as-cast tolerance is about \u00b10.10 mm, which increases with feature size, and precision grades have slightly smaller bands on some dimensions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Concluzie<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/aludiecasting.com\/aluminum-die-casting\/\" target=\"_blank\" rel=\"noopener\">Aluminum die casting<\/a> offers excellent productivity and complexity, but its dimensional ability is ultimately limited by solidification physics, die design, and process control. The practical cast tolerances of \u00b10.10 mm for small features and \u00b10.25-0.35 mm for larger features are realistic and economical based on the standard or ISO 8062-3 guidelines of NADCA.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Selected dimensions can be further tightened with precision grades and controlled processes, but it is almost always necessary to intentionally machine stock and perform secondary operations to ensure critical bores, sealing faces, and close positional relationships.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Have experienced die casters involved at the early stage, define the tolerances that count, and aluminum die casting is an extremely effective way to get precision parts that assemble easily and reliably in production.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Introduction Talking about aluminum die-casting tolerances is probably the most productive conversation you can have in the precision manufacturing world. If you are any engineer who has ever put a drawing on a die caster with the notation \u201c\u00b10.02 mm all over,\u201d you have been told by about the same factor at least once. Aluminum [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":2602,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[17,72,37],"class_list":["post-2601","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-die-casting","tag-aluminium-part","tag-aluminum","tag-aluminum-die-casting"],"_links":{"self":[{"href":"https:\/\/www.diecastingschina.com\/ro\/wp-json\/wp\/v2\/posts\/2601","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.diecastingschina.com\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.diecastingschina.com\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.diecastingschina.com\/ro\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.diecastingschina.com\/ro\/wp-json\/wp\/v2\/comments?post=2601"}],"version-history":[{"count":1,"href":"https:\/\/www.diecastingschina.com\/ro\/wp-json\/wp\/v2\/posts\/2601\/revisions"}],"predecessor-version":[{"id":2607,"href":"https:\/\/www.diecastingschina.com\/ro\/wp-json\/wp\/v2\/posts\/2601\/revisions\/2607"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.diecastingschina.com\/ro\/wp-json\/wp\/v2\/media\/2602"}],"wp:attachment":[{"href":"https:\/\/www.diecastingschina.com\/ro\/wp-json\/wp\/v2\/media?parent=2601"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.diecastingschina.com\/ro\/wp-json\/wp\/v2\/categories?post=2601"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.diecastingschina.com\/ro\/wp-json\/wp\/v2\/tags?post=2601"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}