{"id":6087915,"date":"2026-05-29T09:41:26","date_gmt":"2026-05-29T07:41:26","guid":{"rendered":"https:\/\/boeck-technology.de\/?page_id=6087915"},"modified":"2026-05-29T14:04:59","modified_gmt":"2026-05-29T12:04:59","slug":"fingernail-effect","status":"publish","type":"page","link":"https:\/\/staging.boeck-technology.de\/en\/glossar\/blech\/fingernagel-effekt\/","title":{"rendered":"Fingernail effect"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"6087915\" class=\"elementor elementor-6087915\" data-elementor-post-type=\"page\">\n\t\t\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-1d8bc6f5 process-line wd-section-stretch e-flex e-con-boxed e-con e-parent\" data-id=\"1d8bc6f5\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"wd-negative-gap elementor-element elementor-element-509a0267 e-flex e-con-boxed e-con e-child\" data-id=\"509a0267\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-70d15f7e elementor-widget__width-auto tfc-scoreboard elementor-widget elementor-widget-heading\" data-id=\"70d15f7e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Fingernail effect<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9ec84df color-scheme-inherit text-left elementor-widget elementor-widget-text-editor\" data-id=\"9ec84df\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>\u00a0<span data-contrast=\"none\">The fingernail effect describes the loss of performance of rotating flap tools at excessive speed.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:0,&quot;335559740&quot;:240}\">\u00a0<br \/><\/span><span data-contrast=\"none\">The result is reduced cutting performance, decreased material removal, and insufficient edge rounding.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"wd-negative-gap elementor-element elementor-element-3c09735e wd-section-stretch e-flex e-con-boxed e-con e-child\" data-id=\"3c09735e\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6614b824 elementor-widget elementor-widget-html\" data-id=\"6614b824\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<section class=\"boeck-glossar-entry\">\r\n\r\n  <h2>Origin of the fingernail effect <\/h2>\r\n\r\n  <p>\r\n      The fingernail effect occurs in rotating lamellar tools due to excessively high rotational speeds. \r\n<\/p><p><\/p>\r\n Increasing centrifugal forces stiffen the lamellae and reduce their ability to adapt to the workpiece edge. This makes the tool engagement unstable, reduces the cutting effect, and impairs material removal and edge rounding.\r\n  <\/p>\r\n\r\n  <div class=\"boeck-info-box\">\r\n\r\n    <h3>Factors influencing the fingernail effect<\/h3>\r\n\r\n    <ul>\r\n      <li>speed<\/li>\r\n      <li>tool assembly<\/li>\r\n      <li>process parameters<\/li>\r\n      <li>material properties<\/li>\r\n    <\/ul>\r\n\r\n  <\/div>\r\n\r\n  <h2>Impact on subsequent processes<\/h2>\r\n\r\n  <p>\r\n    An unstable tool engagement reduces the reproducibility of edge processing and affects the quality of subsequent processes. \r\n  <\/p><p>\r\n    This results in uneven transitions between surface and edge, especially when rounding edges. \r\n  <\/p>\r\n\r\n  <div class=\"boeck-info-box\">\r\n\r\n    <h3>Potential impacts on quality<\/h3>\r\n\r\n    <ul>\r\n      <li>reduced removal rate<\/li>\r\n      <li>insufficient edge rounding <\/li>\r\n      <li>unstable tool engagement<\/li>\r\n      <li>decreasing cutting effect<\/li>\r\n      <li>uneven tool wear<\/li>\r\n      <li>reduced process stability<\/li>\r\n    <\/ul>\r\n\r\n  <\/div>\r\n\r\n\r\n  <h2>Difference between stable and unstable tool engagement<\/h2>\r\n\r\n  <p>\r\n    With stable process control, the lamellae actively engage the workpiece edge and produce reproducible rounding. \r\n  <\/p><p>\r\n    In contrast, with the fingernail effect, the lamellae become increasingly stiff. The tool intervention becomes superficial and unstable. \r\n  <\/p>\r\n\r\n  <div class=\"boeck-info-box\">\r\n\r\n    <h3>Typical differences<\/h3>\r\n\r\n    <ul>\r\n\r\n      <li>\r\n        <strong>Stable tool engagement:<\/strong>\r\n        active cutting action at the workpiece edge\r\n      <\/li>\r\n\r\n      <li>\r\n        <strong>Fingernail effect:<\/strong>\r\n        superficial contact through stiffened lamellae\r\n      <\/li>\r\n      <li>\r\n        <strong>Stable tool engagement:<\/strong>\r\n        uniform edge rounding\r\n      <\/li>\r\n\r\n      <li>\r\n        <strong>Fingernail effect:<\/strong>\r\n        insufficient and unstable rounding\r\n      <\/li>\r\n\r\n<li>\r\n        <strong>Stable tool engagement:<\/strong>\r\n        controlled material removal\r\n      <\/li>\r\n\r\n      <li>\r\n        <strong>Fingernail effect:<\/strong>\r\n        decreased material removal and unproductive wear\r\n      <\/li>\r\n\r\n\r\n\r\n    <\/ul>\r\n\r\n  <\/div>\r\n\r\n  <h2>Edge rounding as a process step<\/h2>\r\n\r\n  <p>\r\n    In the deburring and edge rounding process step, rotating lamellar tools are used to remove primary and secondary burrs and to create a reproducible radius-like transition between surface and edge. \r\n  <\/p>\r\n\r\n  <div class=\"boeck-process-box\">\r\n\r\n    <span>Related process step<\/span>\r\n\r\n    <a href=\"\/en\/edge-rounding-sheet-metal\/\">\r\n      Edge rounding of sheet metal\r\n    <\/a>\r\n\r\n  <\/div>\r\n\r\n  <h2>FAQ<\/h2>\r\n\r\n  <div class=\"boeck-faq-item\">\r\n\r\n    <h3>What is the fingernail effect during deburring?<\/h3>\r\n\r\n    <p>\r\n      The fingernail effect describes the loss of power in rotating lamellar tools at excessively high speeds and reduced cutting effect during deburring and edge rounding. \r\n    <\/p>\r\n\r\n  <\/div>\r\n\r\n  <div class=\"boeck-faq-item\">\r\n\r\n    <h3>How can the fingernail effect be avoided?<\/h3>\r\n\r\n    <p>\r\n      The fingernail effect is avoided through a coordinated rotational speed, stable cutting speed and flexible lamellar tools. \r\n    <\/p>\r\n\r\n  <\/div>\r\n\r\n  <h2>Further topics<\/h2>\r\n\r\n<div class=\"boeck-link-grid\">\r\n\r\n  <a href=\"\/en\/glossary\/sheet-metal\/secondary-ridge\/\" class=\"boeck-link-card\">\r\n\r\n    <strong>secondary burr.<\/strong>\r\n\r\n    <span>\r\n      Material displacement due to unstable post-processing processes.\r\n    <\/span>\r\n\r\n  <\/a>\r\n\r\n  <a href=\"\/en\/glossary\/sheet-metal\/edge-radii\/\" class=\"boeck-link-card\">\r\n\r\n    <strong>Edge radii<\/strong>\r\n\r\n    <span>\r\n      Smooth transition between surface and edge.\r\n    <\/span>\r\n\r\n  <\/a>\r\n\r\n  <a href=\"\/en\/edge-rounding-sheet-metal\/\" class=\"boeck-link-card\">\r\n\r\n    <strong>Edge rounding of sheet metal<\/strong>\r\n\r\n    <span>\r\n      Process for controlled rounding of workpiece edges.\r\n    <\/span>\r\n\r\n  <\/a>\r\n\r\n  <a href=\"\/en\/glossary\/sheet-metal\/ridge\/\" class=\"boeck-link-card\">\r\n\r\n    <strong>Burr<\/strong>\r\n\r\n    <span>\r\n      Material protrusion at workpiece edges after machining processes.\r\n    <\/span>\r\n\r\n  <\/a>\r\n\r\n<\/div>\r\n\r\n<\/section>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Fingernagel-Effekt \u00a0Der Fingernagel-Effekt beschreibt den Leistungsverlust rotierender Lamellenwerkzeuge bei zu hoher Drehzahl.\u00a0Die Folge sind reduzierte Schneidwirkung, sinkender Materialabtrag und unzureichende<\/p>","protected":false},"author":47,"featured_media":0,"parent":6087851,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-6087915","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.6.1 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Fingernagel-Effekt beim Entgraten | Glossar Blechbearbeitung<\/title>\n<meta name=\"description\" content=\"Der Fingernagel-Effekt beschreibt den Leistungsverlust rotierender Lamellenwerkzeuge bei zu hoher Drehzahl. 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