{"id":14535,"date":"2026-03-20T00:32:00","date_gmt":"2026-03-20T00:32:00","guid":{"rendered":"https:\/\/fnews55.com\/?p=14535"},"modified":"2026-03-20T00:32:00","modified_gmt":"2026-03-20T00:32:00","slug":"how-to-identify-small-glass-tubes-with-tiny-ball-bearings","status":"publish","type":"post","link":"https:\/\/fnews55.com\/?p=14535","title":{"rendered":"How to Identify Small Glass Tubes With Tiny Ball Bearings"},"content":{"rendered":"\n<p>If you find a small glass tube with three tiny steel balls, it\u2019s not random\u2014it\u2019s a precision part from an antique spirit level, often called a bullseye or machinist\u2019s level.<\/p>\n\n\n\n<p>Unlike standard levels that use a bubble, these use a dome-shaped liquid capsule. The steel balls settle at the lowest point, showing level from any angle.<\/p>\n\n\n\n<p><strong>Why steel balls?<\/strong><br>They\u2019re easier to read in vibration, act as clear gravity indicators, and improve accuracy through triangulation.<\/p>\n\n\n\n<p><strong>Where they come from:<\/strong><br>Old wooden or brass levels, machinist toolkits, or vintage tool shops.<\/p>\n\n\n\n<p>If the tube is sealed, dome-shaped, and set in metal, it likely came from a leveling instrument.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>If you find a small glass tube with three tiny steel balls, it\u2019s not random\u2014it\u2019s a precision part from an antique spirit level, often called a bullseye or machinist\u2019s level. Unlike standard levels that use a bubble, these use a dome-shaped liquid capsule. The steel balls settle at the lowest point, showing level from any &hellip;<\/p>\n","protected":false},"author":18,"featured_media":14536,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-14535","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/fnews55.com\/index.php?rest_route=\/wp\/v2\/posts\/14535","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fnews55.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fnews55.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fnews55.com\/index.php?rest_route=\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/fnews55.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=14535"}],"version-history":[{"count":0,"href":"https:\/\/fnews55.com\/index.php?rest_route=\/wp\/v2\/posts\/14535\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/fnews55.com\/index.php?rest_route=\/"}],"wp:attachment":[{"href":"https:\/\/fnews55.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=14535"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fnews55.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=14535"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fnews55.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=14535"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}