{
  "title": "Duramin-4 entry-level hardness tester",
  "kind": "product",
  "company": "Struers",
  "category": "Metrology & quality control",
  "parameters": {
    "Language": "English"
  },
  "language": "en",
  "source_url": "https://www.struers.com/en/products/hardness-testing/hardness-testing-equipment/duramin-4",
  "content_html": "<h2>Duramin-4 entry-level hardness tester | Struers.com</h2><p>An entry-level Vickers, Knoop and Brinell micro and macro hardness testing machine, the Duramin-4 combines manual and automatic features for optimal repeatability and is ideal for single task testing in the laboratory or production environment.</p><h2>Duramin-4</h2><h2>Entry-level Vickers hardness tester – optimal repeatability and easy operation</h2><img src=\"/files/struers-file-5209d9736228f78ce473ed27/duramin-4-1024x665px.png\" alt=\"\" loading=\"lazy\"><img src=\"/files/struers-file-0e7a1485cebb389e01f6f20d/duramin-4-lab-1024x665-px.png\" alt=\"\" loading=\"lazy\"><img src=\"/files/struers-file-e01cb510c37b7cbbeed04945/duramin-4-automatic-6-position-turret-1024x665-px.png\" alt=\"\" loading=\"lazy\"><img src=\"/files/struers-file-115e239671ffa1d640aa7b49/duramin-4-okular-vertical1024x665px.png\" alt=\"\" loading=\"lazy\"><img src=\"/files/struers-file-57f322358e343f702d18b64c/duramin-4-touret-sample-1024x665px.png\" alt=\"\" loading=\"lazy\"><h2>Duramin-4 – Manual Micro and Micro/Macro Hardness Tester</h2><p>Methods: Vickers, Knoop and Brinell hardness testing</p><p>Load ranges: 10 gf-2 kgf, 1-62.5 kgf</p><p>Manual micro and micro/macro hardness tester</p><p>Automatic six-position turret</p><p>Manual XY-stage and Z-axis</p><p>Manual indent evaluation via an eyepiece</p><p>This entry-level range of microhardness testers primarily targets Vickers testing, but can also be used for Knoop and Brinell testing. The Duramin-4 testers are equipped with a combination of manual and automatic features to ensure easy operation. Duramin-4 is available in two load ranges; 10 gf – 2.0 kgf and 1.0 kgf – 62.5 kgf.&amp;nbsp;</p><h2>How does Duramin 4 support your Hardness Testing</h2><h3>Accuracy and repeatability</h3>\nAdvanced load cell technology ensures that the Duramin-4 conforms to all operating standards, while offering consistent repeatability throughout the entire load range.\n<h3>Easy operation</h3>\nThe display unit combines a touchscreen with a simple user interface, designed to be easy to use, yet robust enough to withstand the toughest production environment. The hardness evaluation takes place manually via an eyepiece, where the measurement lines are simply positioned around the indent.\n<h3>Dedicated solution</h3>\nDuramin-4 is ideal for use as a dedicated Vickers single task tester, both in a laboratory (M1) or more production-focused (M2) environment.<img src=\"/files/struers-file-cbec75b9b1e54d24d2ec95fd/duramin-4-easy-operation-974x1400px.png\" alt=\"\" loading=\"lazy\"><p>Accuracy and repeatability</p><img src=\"/files/struers-file-452134e2366c563fe5000661/duramin-4-easy-operation-975x1400px.png\" alt=\"\" loading=\"lazy\"><p>Easy operation</p><img src=\"/files/struers-file-b80a0d144b4aa7d2d0648b19/duramin-4-dedicated-solution-975x1400px.png\" alt=\"\" loading=\"lazy\"><p>Dedicated solution</p><img src=\"/files/struers-file-9b5aee690ae558cdb01178fc/duramin-4-manual-xystage-1024x759px.jpg\" alt=\"\" loading=\"lazy\"><p>Using micrometer spindles, the sample is positioned manually. Simply turning the two spindles ensures that the XY-stage and sample can be positioned precisely under the objective lens.</p><h2>Manual XY-stage</h2><img src=\"/files/struers-file-b9ed719a8c91873fcbeec52c/duramin-4-manual-zaxis-1024x759-px.jpg\" alt=\"\" loading=\"lazy\"><p>Sample height is adjusted manually by turning a hand wheel. This positions the XY-stage and sample at the ideal working height.</p><h2>Manual Z-axis</h2><img src=\"/files/struers-file-cde6962320248f8455ae25d5/duramin-4-manual-evaluation-via-eye-piece-1024x759px.jpg\" alt=\"\" loading=\"lazy\"><p>Indent evaluation is carried out via an eyepiece, and hardness value is displayed on the display unit.</p><h2>Manual evaluation via an eyepiece</h2><img src=\"/files/struers-file-f229d1321437b996c5552eec/duramin-4-led-illumination-1024x759-px.jpg\" alt=\"\" loading=\"lazy\"><p>The illumination system is based on LED technology to ensure constant illumination intensity throughout the lifetime of the LED. This eliminates variations in indent evaluation that can be associated with other illumination sources.</p><h2>LED illumination</h2><img src=\"/files/struers-file-c32884fc49fd62af452ff9c4/duramin-4-fast-and-easy-exchange-1024x759-px.jpg\" alt=\"\" loading=\"lazy\"><p>Duramin-4 is available with a six-position automatic turret that facilitates the exchange of up to five indenters and four objective lenses. This eliminates the tedious task of continuously exchanging indenters and objectives lenses, avoiding subsequent calibration and potential human errors.</p><h2>Fast and easy exchange of test methods</h2><img src=\"/files/struers-file-4ae4837e89ccec406ccbc49c/duramin-4-flexible-clamping-1024x759-px.jpg\" alt=\"\" loading=\"lazy\"><p>Several holders and clamping devices are available, suitable for both mounted and unmounted samples.</p><h2>Flexible clamping</h2><img src=\"/files/struers-file-b281863f520d3b7ecae9e274/duramin-4-available-in-two-versions-1024x759-px.jpg\" alt=\"\" loading=\"lazy\"><p>Duramin-4 is available in a low load, low frame version, which is ideal for laboratory use, and in a high load, high frame version for use in a more production oriented or QC environment.</p><h2>Available in two versions</h2><h2>Facts</h2><h2>Model Types</h2><h2>Both Duramin-4 models come with an eight-inch touchscreen, manual indent evaluation via an eye piece, manual Z-axis, manual XY-stage (size 90 x 90 mm, stroke 25 x 25 mm), including manual micrometers. Both are equipped with a motorized, six-position measurement turret.</h2><p>Struers’ equipment is in conformity with the provisions of the applicable international directives and their appurtenant standards. Struers’ products are subject to constant product development. Therefore, we reserve the right to introduce changes to our products without notice.</p><img src=\"/files/struers-file-8925a68a700ae7b2cce7d6fa/duramin-4-m1-updated-974x410px.png\" alt=\"\" loading=\"lazy\"><h2>Duramin-4 M1</h2>Low load hardness tester based on load cell technology Ideal for the automatic testing of Vickers and Knoop  Test height 0-200 mm <table>\n    <thead>\n        <tr>\n            <th>Variants</th>\n            <th>10 gf – 2 kgf</th>\n            <th>1.0 kgf – 62.5 kgf</th>\n        </tr>\n    </thead>\n    <tbody>\n        <tr>\n            <td>Low frame</td>\n            <td>Duramin-4 M1</td>\n            <td> </td>\n        </tr>\n        <tr>\n            <td>Tall frame</td>\n            <td> </td>\n            <td>Duramin-4 M2</td>\n        </tr>\n    </tbody>\n</table><img src=\"/files/struers-file-942ccdb155017d294e0e5d7f/duramin-4-m2-974x410px.png\" alt=\"\" loading=\"lazy\"><h2>Duramin-4 M2</h2><p>Macrohardness tester based on load cell technology Ideal for the automatic testing of Vickers, Knoop, and Brinell With a test load range of 9.81 – 613.1 N (1.0 kgf – 62.5 kgf) Test height 0-400 mm</p><h2>Technical Data</h2><h2>Duramin 4 Technical Sheet</h2><p>Struers Technical Data Sheets are designed to help you make the best choice of equipment for your particular purpose. You can find important information such as capacity and performance specifications, dimensions, weight, electrical data, noise levels, ambient conditions, and safety. In many cases you can also obtain an overview of accessories offering higher capacity and performance.</p><img src=\"/files/struers-file-b96d30fa7ea0453989feac5c/new-tech-sheets-icon.jpg\" alt=\"\" loading=\"lazy\"><p><a href=\"/records/struers-library-sds-struers-com-66278\">Duramin 4 Technical Sheet</a></p><h2>Get your brochure for Duramin-4</h2><h2>Get your brochure for Duramin-4</h2><p>Get the full introduction, descriptive visuals, and key feature descriptions to help you qualify your choice of equipment.\n\n•\tExplanatory fotos\n•\tKey feature descriptions\n•\tTechnical Data Sheet</p><img src=\"/files/struers-file-a22858a294a68fe349d82ef9/new-brochures-icon.jpg\" alt=\"\" loading=\"lazy\"><p><a href=\"/files/struers-file-c9518b32c9eb32b2e94b7e99/duramin-product-overview.pdf\">Related resource</a></p><p>This entry-level range of microhardness testers primarily targets Vickers testing, but can also be used for Knoop and Brinell testing. The Duramin-4 testers are equipped with a combination of manual and automatic features to ensure easy operation. Duramin-4 is available in two load ranges; 10 gf – 2.0 kgf and 1.0 kgf – 62.5 kgf.&amp;nbsp;</p><p>Read more</p><p>Read more</p>",
  "summary": "An entry-level Vickers, Knoop and Brinell micro and macro hardness testing machine, the Duramin-4 combines manual and automatic features for optimal repeatability and is ideal for single task testing in the laboratory or production environment.",
  "sections": [],
  "updated_at": "2026-10-17"
}