{"id":109,"date":"2026-09-02T10:00:00","date_gmt":"2026-09-02T06:30:00","guid":{"rendered":"https:\/\/sanatiblog.ir\/blog\/calipers-vernier-dial-or-digital\/"},"modified":"2026-09-02T10:00:00","modified_gmt":"2026-09-02T06:30:00","slug":"calipers-vernier-dial-or-digital","status":"publish","type":"post","link":"https:\/\/sanatiblog.ir\/fa\/blog\/calipers-vernier-dial-or-digital\/","title":{"rendered":"\u06a9\u0648\u0644\u06cc\u0633: \u0648\u0631\u0646\u06cc\u0647\u060c \u0633\u0627\u0639\u062a\u06cc \u06cc\u0627 \u062f\u06cc\u062c\u06cc\u062a\u0627\u0644\u061f"},"content":{"rendered":"<p>All three measure the same things: outside, inside and depth. The difference is how you read the number, and how much care each one needs.<\/p>\n<h2>Vernier caliper<\/h2>\n<p>No battery and almost nothing to break. You read a small second scale, so it takes good eyes and a little practice. Usual steps are 0.05 or 0.02 mm. A good choice for a workshop where tools get dropped.<\/p>\n<h2>Dial caliper<\/h2>\n<p>A needle on a round dial, easy to read at a glance, usually in 0.02 or 0.01 mm steps. Inside is a small gear on a toothed rack: dust, chips and a hard drop can damage it.<\/p>\n<h2>Digital caliper<\/h2>\n<p>The easiest to read: 0.01 mm on a screen, a mm\/inch button, and you can set zero anywhere to compare two parts. It needs a battery. Near coolant or oil, ask for an IP67 model (sealed against water).<\/p>\n<h2>When a caliper is not enough<\/h2>\n<p>A good caliper is accurate to about \u00b10.02\u20130.03 mm. If your drawing asks for tighter limits, for example a bearing seat, use a micrometer.<\/p>\n<h2>What to tell the seller<\/h2>\n<ul>\n<li><strong>Length:<\/strong> 150 mm is the usual size; 200 or 300 mm for bigger parts.<\/li>\n<li><strong>Type and step<\/strong> (from above).<\/li>\n<li><strong>Original or not:<\/strong> fakes of well-known brands are common. Close the jaws and hold them up to a light: you should see no light between them, and the reading should be exactly zero.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u0647\u0631 \u0646\u0648\u0639 \u0628\u0647 \u0686\u0647 \u06a9\u0627\u0631\u06cc \u0645\u06cc\u200c\u062e\u0648\u0631\u062f\u060c \u0648 \u06a9\u06cc \u0628\u0647 \u062c\u0627\u06cc \u06a9\u0648\u0644\u06cc\u0633 \u0645\u06cc\u06a9\u0631\u0648\u0645\u062a\u0631 \u0644\u0627\u0632\u0645 \u062f\u0627\u0631\u06cc\u062f.<\/p>\n","protected":false},"author":0,"featured_media":124,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-109","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/sanatiblog.ir\/fa\/wp-json\/wp\/v2\/posts\/109","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sanatiblog.ir\/fa\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sanatiblog.ir\/fa\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/sanatiblog.ir\/fa\/wp-json\/wp\/v2\/comments?post=109"}],"version-history":[{"count":0,"href":"https:\/\/sanatiblog.ir\/fa\/wp-json\/wp\/v2\/posts\/109\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sanatiblog.ir\/fa\/wp-json\/wp\/v2\/media\/124"}],"wp:attachment":[{"href":"https:\/\/sanatiblog.ir\/fa\/wp-json\/wp\/v2\/media?parent=109"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sanatiblog.ir\/fa\/wp-json\/wp\/v2\/categories?post=109"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sanatiblog.ir\/fa\/wp-json\/wp\/v2\/tags?post=109"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}