{"id":3076,"date":"2026-10-08T17:17:06","date_gmt":"2026-10-08T17:17:06","guid":{"rendered":"https:\/\/yocl.com\/?wpr2_import=f3cf868671a231d98b66f6eb712a054384fe3fa739e3bd359eb2729d03ed3a2b"},"modified":"2026-10-08T17:17:06","modified_gmt":"2026-10-08T17:17:06","slug":"2-1-vs-3-1-vs-4-1-heat-shrink-tubing","status":"publish","type":"post","link":"https:\/\/yocl.com\/ru\/2-1-vs-3-1-vs-4-1-heat-shrink-tubing\/","title":{"rendered":"2:1 \u043f\u0440\u043e\u0442\u0438\u0432 3:1 \u043f\u0440\u043e\u0442\u0438\u0432 4:1 \u0422\u0435\u0440\u043c\u043e\u0443\u0441\u0430\u0434\u043e\u0447\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u043a\u0430: \u043a\u0430\u043a\u043e\u0439 \u043a\u043e\u044d\u0444\u0444\u0438\u0446\u0438\u0435\u043d\u0442 \u0443\u0441\u0430\u0434\u043a\u0438 \u0432\u0430\u043c \u043d\u0443\u0436\u0435\u043d?"},"content":{"rendered":"<p><strong>\u0412\u044b\u0431\u0435\u0440\u0438\u0442\u0435 \u043a\u043e\u044d\u0444\u0444\u0438\u0446\u0438\u0435\u043d\u0442 \u0443\u0441\u0430\u0434\u043a\u0438 \u0432 \u0437\u0430\u0432\u0438\u0441\u0438\u043c\u043e\u0441\u0442\u0438 \u043e\u0442 \u043f\u0435\u0440\u0435\u0445\u043e\u0434\u0430 \u0434\u0438\u0430\u043c\u0435\u0442\u0440\u0430, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0434\u043e\u043b\u0436\u043d\u0430 \u043f\u0435\u0440\u0435\u043a\u0440\u044b\u0442\u044c \u0442\u0440\u0443\u0431\u043a\u0430.<\/strong> \u0415\u0435 \u043f\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u043c\u044b\u0439 \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0438\u0439 \u0434\u0438\u0430\u043c\u0435\u0442\u0440 \u0434\u043e\u043b\u0436\u0435\u043d \u0431\u044b\u0442\u044c \u0431\u043e\u043b\u044c\u0448\u0435 \u043d\u0430\u0438\u0431\u043e\u043b\u044c\u0448\u0435\u0433\u043e \u0432\u044b\u0441\u0442\u0443\u043f\u0430, \u0430 \u0435\u0435 \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u043d\u044b\u0439 \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0438\u0439 \u0434\u0438\u0430\u043c\u0435\u0442\u0440 \u0434\u043e\u043b\u0436\u0435\u043d \u0431\u044b\u0442\u044c \u043c\u0435\u043d\u044c\u0448\u0435 \u0441\u0430\u043c\u043e\u0439 \u0443\u0437\u043a\u043e\u0439 \u043f\u043e\u0432\u0435\u0440\u0445\u043d\u043e\u0441\u0442\u0438, \u043a\u043e\u0442\u043e\u0440\u0443\u044e \u043e\u043d\u0430 \u0434\u043e\u043b\u0436\u043d\u0430 \u043e\u0445\u0432\u0430\u0442\u044b\u0432\u0430\u0442\u044c. \u041f\u043e\u0434\u0445\u043e\u0434\u044f\u0449\u0438\u0439 \u0440\u0430\u0437\u043c\u0435\u0440 2:1 \u0443\u0436\u0435 \u043c\u043e\u0436\u0435\u0442 \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u044d\u0442\u0443 \u0437\u0430\u0434\u0430\u0447\u0443. \u0420\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0438\u0442\u0435 3:1 \u0438\u043b\u0438 4:1, \u043a\u043e\u0433\u0434\u0430 \u0444\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0440\u0430\u0437\u043c\u0435\u0440\u044b \u0442\u0440\u0435\u0431\u0443\u044e\u0442 \u0431\u043e\u043b\u0435\u0435 \u0448\u0438\u0440\u043e\u043a\u043e\u0433\u043e \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d\u0430 \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f.<\/p>\n<p>\u0411\u043e\u043b\u0435\u0435 \u0432\u044b\u0441\u043e\u043a\u0438\u0439 \u043a\u043e\u044d\u0444\u0444\u0438\u0446\u0438\u0435\u043d\u0442 \u0443\u0441\u0430\u0434\u043a\u0438 \u0441\u0430\u043c \u043f\u043e \u0441\u0435\u0431\u0435 \u043d\u0435 \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432\u0430\u0435\u0442 \u0430\u0434\u0433\u0435\u0437\u0438\u044e, \u0433\u0435\u0440\u043c\u0435\u0442\u0438\u0447\u043d\u043e\u0435 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 \u0438\u043b\u0438 \u0431\u043e\u043b\u0435\u0435 \u0432\u044b\u0441\u043e\u043a\u0438\u0439 \u044d\u043b\u0435\u043a\u0442\u0440\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0440\u0435\u0439\u0442\u0438\u043d\u0433. \u0421\u043d\u0430\u0447\u0430\u043b\u0430 \u0441\u0440\u0430\u0432\u043d\u0438\u0442\u0435 \u0433\u0435\u043e\u043c\u0435\u0442\u0440\u0438\u044e, \u0437\u0430\u0442\u0435\u043c \u043f\u0440\u043e\u0432\u0435\u0440\u044c\u0442\u0435 \u043a\u043e\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u044e \u0438 \u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u043a\u043e\u043d\u043a\u0440\u0435\u0442\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u0430.<\/p>\n<h2>\u0421\u0440\u0430\u0432\u043d\u0438\u0442\u0435 2:1, 3:1 \u0438 4:1 \u043f\u0440\u0438 \u043e\u0434\u0438\u043d\u0430\u043a\u043e\u0432\u043e\u0439 \u0433\u0435\u043e\u043c\u0435\u0442\u0440\u0438\u0438<\/h2>\n<p>\u041a\u043e\u044d\u0444\u0444\u0438\u0446\u0438\u0435\u043d\u0442 \u0443\u0441\u0430\u0434\u043a\u0438 \u043e\u043f\u0438\u0441\u044b\u0432\u0430\u0435\u0442 \u043d\u043e\u043c\u0438\u043d\u0430\u043b\u044c\u043d\u043e\u0435 \u0441\u043e\u043e\u0442\u043d\u043e\u0448\u0435\u043d\u0438\u0435 \u043c\u0435\u0436\u0434\u0443 <strong>\u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u043d\u044b\u043c \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0438\u043c \u0434\u0438\u0430\u043c\u0435\u0442\u0440\u043e\u043c (ID)<\/strong> \u0438 <strong>\u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u043d\u044b\u043c \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0438\u043c \u0434\u0438\u0430\u043c\u0435\u0442\u0440\u043e\u043c<\/strong>. \u0414\u043b\u044f \u0438\u0434\u0435\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u0430\u0440\u0438\u0444\u043c\u0435\u0442\u0438\u043a\u0438:<\/p>\n<p><strong>\u0421\u0432\u043e\u0431\u043e\u0434\u043d\u043e \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u0435\u043c\u044b\u0439 \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0438\u0439 \u0434\u0438\u0430\u043c\u0435\u0442\u0440 = \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u043d\u044b\u0439 \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0438\u0439 \u0434\u0438\u0430\u043c\u0435\u0442\u0440 \u00f7 \u043a\u043e\u044d\u0444\u0444\u0438\u0446\u0438\u0435\u043d\u0442<\/strong><\/p>\n<p>\u041f\u0440\u0438 \u043e\u0434\u0438\u043d\u0430\u043a\u043e\u0432\u043e\u043c \u0433\u0438\u043f\u043e\u0442\u0435\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u043c 15 mm \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u043d\u043e\u043c \u043e\u0442\u0432\u0435\u0440\u0441\u0442\u0438\u0438, 2:1 \u0434\u0430\u0435\u0442 7.5 mm, 3:1 \u0434\u0430\u0435\u0442 5 mm, \u0430 4:1 \u0434\u0430\u0435\u0442 3.75 mm. \u042d\u0442\u043e \u0438\u043b\u043b\u044e\u0441\u0442\u0440\u0430\u0442\u0438\u0432\u043d\u044b\u0435 \u043a\u043e\u043d\u0435\u0447\u043d\u044b\u0435 \u0442\u043e\u0447\u043a\u0438 \u0431\u0435\u0437 \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0435\u0433\u043e \u043e\u0431\u044a\u0435\u043a\u0442\u0430, \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435, \u0430 \u043d\u0435 \u0433\u0430\u0440\u0430\u043d\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0435 \u0440\u0430\u0437\u043c\u0435\u0440\u044b \u0442\u0440\u0435\u0445 \u043a\u0430\u0442\u0430\u043b\u043e\u0436\u043d\u044b\u0445 \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u043e\u0432. \u041a\u043e\u044d\u0444\u0444\u0438\u0446\u0438\u0435\u043d\u0442 \u043e\u043f\u0438\u0441\u044b\u0432\u0430\u0435\u0442 \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u0434\u0438\u0430\u043c\u0435\u0442\u0440\u0430; \u043e\u043d \u043d\u0435 \u0434\u0435\u043b\u0438\u0442 \u0434\u043b\u0438\u043d\u0443 \u0440\u0435\u0437\u043a\u0438 \u0438 \u043d\u0435 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u044f\u0435\u0442 \u043a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u043e \u0441\u0442\u0435\u043d\u043e\u043a. <a href=\"https:\/\/yocl.com\/ru\/what-is-heat-shrink-tubing\/\">\u0440\u0443\u043a\u043e\u0432\u043e\u0434\u0441\u0442\u0432\u043e \u043f\u043e \u0442\u0435\u0440\u043c\u0438\u043d\u043e\u043b\u043e\u0433\u0438\u0438 \u0442\u0435\u0440\u043c\u043e\u0443\u0441\u0430\u0434\u043e\u0447\u043d\u043e\u0439 \u0442\u0440\u0443\u0431\u043a\u0438<\/a> \u043e\u0431\u044a\u044f\u0441\u043d\u044f\u0435\u0442 \u044d\u0442\u0438 \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u0435 \u043f\u043e\u043b\u044f.<\/p>\n<figure class=\"wp-block-image\">\n<img decoding=\"async\" src=\"https:\/\/yocl.com\/wp-content\/uploads\/2026\/10\/2-1-vs-3-1-vs-4-1-heat-shrink-tubing-ratio-comparison.webp\" alt=\"Hypothetical 15 mm expanded bore compared with 7.5, 5 and 3.75 mm freely recovered bores for 2:1, 3:1 and 4:1 tubing\"><figcaption>\u041a\u043e\u043d\u0446\u0435\u043f\u0442\u0443\u0430\u043b\u044c\u043d\u043e, \u043d\u0435 \u0432 \u043c\u0430\u0441\u0448\u0442\u0430\u0431\u0435. \u041d\u043e\u043c\u0438\u043d\u0430\u043b\u044c\u043d\u0430\u044f \u0430\u0440\u0438\u0444\u043c\u0435\u0442\u0438\u043a\u0430 \u0434\u043b\u044f \u043e\u0431\u0449\u0435\u0433\u043e 15 mm \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u043d\u043e\u0433\u043e \u043e\u0442\u0432\u0435\u0440\u0441\u0442\u0438\u044f. \u041f\u0443\u0441\u0442\u044b\u0435 \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u043d\u044b\u0435 \u043e\u0442\u0432\u0435\u0440\u0441\u0442\u0438\u044f \u0438\u043b\u043b\u044e\u0441\u0442\u0440\u0438\u0440\u0443\u044e\u0442 \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0435 \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435; \u0444\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u0430 \u043f\u043e-\u043f\u0440\u0435\u0436\u043d\u0435\u043c\u0443 \u0443\u043f\u0440\u0430\u0432\u043b\u044f\u044e\u0442 \u0432\u044b\u0431\u043e\u0440\u043e\u043c \u0440\u0430\u0437\u043c\u0435\u0440\u0430.<\/figcaption><\/figure>\n<p>\u0422\u0435\u043f\u0435\u0440\u044c \u0443\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0439\u0442\u0435 \u0441\u0430\u043c\u044b\u0439 \u0431\u043e\u043b\u044c\u0448\u043e\u0439 \u043a\u0440\u0443\u0433\u043b\u044b\u0439 \u044d\u043b\u0435\u043c\u0435\u043d\u0442, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0434\u043e\u043b\u0436\u043d\u0430 \u043f\u0440\u043e\u0439\u0442\u0438 \u0442\u0440\u0443\u0431\u043a\u0430, \u043d\u0430 <strong>13 mm \u043d\u0430\u0440\u0443\u0436\u043d\u043e\u043c \u0434\u0438\u0430\u043c\u0435\u0442\u0440\u0435 (OD)<\/strong>. \u0418\u0437\u043c\u0435\u043d\u0438\u0442\u0435 \u0442\u043e\u043b\u044c\u043a\u043e \u0441\u0430\u043c\u0443\u044e \u043c\u0430\u043b\u0435\u043d\u044c\u043a\u0443\u044e \u043a\u0440\u0443\u0433\u043b\u0443\u044e \u043f\u043e\u0432\u0435\u0440\u0445\u043d\u043e\u0441\u0442\u044c, \u043d\u0430 \u043a\u043e\u0442\u043e\u0440\u0443\u044e \u043e\u043d\u0430 \u0434\u043e\u043b\u0436\u043d\u0430 \u043f\u0440\u0438\u043b\u0435\u0433\u0430\u0442\u044c. \u0412\u0441\u0435 \u0442\u0440\u0438 \u0433\u0438\u043f\u043e\u0442\u0435\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0433\u0438\u043b\u044c\u0437\u044b \u043d\u0430\u0447\u0438\u043d\u0430\u044e\u0442\u0441\u044f \u0441 \u043e\u0434\u0438\u043d\u0430\u043a\u043e\u0432\u043e\u0433\u043e 15 mm \u043e\u0442\u0432\u0435\u0440\u0441\u0442\u0438\u044f, \u043f\u043e\u044d\u0442\u043e\u043c\u0443 \u0441\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u0435 \u0438\u0437\u043e\u043b\u0438\u0440\u0443\u0435\u0442 \u0438\u0445 \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f.<\/p>\n<table>\n<thead>\n<tr>\n<th>\u041c\u0438\u043d\u0438\u043c\u0430\u043b\u044c\u043d\u044b\u0439 \u043d\u0430\u0440\u0443\u0436\u043d\u044b\u0439 \u0434\u0438\u0430\u043c\u0435\u0442\u0440 \u043f\u043e\u0441\u0430\u0434\u043a\u0438<\/th>\n<th>2:1: \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u044b\u0439 \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440 7.5 mm<\/th>\n<th>3:1: \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u044b\u0439 \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440 5 mm<\/th>\n<th>4:1: \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u044b\u0439 \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440 3.75 mm<\/th>\n<th>\u0414\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e\u0435 \u0441\u043e\u043e\u0442\u043d\u043e\u0448\u0435\u043d\u0438\u0435 \u043f\u0440\u0438 \u044d\u0442\u0438\u0445 \u043f\u0440\u0435\u0434\u043f\u043e\u043b\u043e\u0436\u0435\u043d\u0438\u044f\u0445<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>9 mm<\/td>\n<td>\u041d\u0438\u0436\u0435 \u043d\u0430\u0440\u0443\u0436\u043d\u043e\u0433\u043e \u0434\u0438\u0430\u043c\u0435\u0442\u0440\u0430 \u043f\u043e\u0441\u0430\u0434\u043a\u0438<\/td>\n<td>\u041d\u0438\u0436\u0435 \u043d\u0430\u0440\u0443\u0436\u043d\u043e\u0433\u043e \u0434\u0438\u0430\u043c\u0435\u0442\u0440\u0430 \u043f\u043e\u0441\u0430\u0434\u043a\u0438<\/td>\n<td>\u041d\u0438\u0436\u0435 \u043d\u0430\u0440\u0443\u0436\u043d\u043e\u0433\u043e \u0434\u0438\u0430\u043c\u0435\u0442\u0440\u0430 \u043f\u043e\u0441\u0430\u0434\u043a\u0438<\/td>\n<td>\u0412\u0441\u0435 \u0442\u0440\u0438; 2:1 \u0443\u0436\u0435 \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u0433\u0435\u043e\u043c\u0435\u0442\u0440\u0438\u0447\u0435\u0441\u043a\u0438<\/td>\n<\/tr>\n<tr>\n<td>6 mm<\/td>\n<td>\u0421\u043b\u0438\u0448\u043a\u043e\u043c \u0431\u043e\u043b\u044c\u0448\u043e\u0439<\/td>\n<td>\u041d\u0438\u0436\u0435 \u043d\u0430\u0440\u0443\u0436\u043d\u043e\u0433\u043e \u0434\u0438\u0430\u043c\u0435\u0442\u0440\u0430 \u043f\u043e\u0441\u0430\u0434\u043a\u0438<\/td>\n<td>\u041d\u0438\u0436\u0435 \u043d\u0430\u0440\u0443\u0436\u043d\u043e\u0433\u043e \u0434\u0438\u0430\u043c\u0435\u0442\u0440\u0430 \u043f\u043e\u0441\u0430\u0434\u043a\u0438<\/td>\n<td>3:1 \u0438\u043b\u0438 4:1; 3:1 \u0443\u0436\u0435 \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u0433\u0435\u043e\u043c\u0435\u0442\u0440\u0438\u0447\u0435\u0441\u043a\u0438<\/td>\n<\/tr>\n<tr>\n<td>4.5 mm<\/td>\n<td>\u0421\u043b\u0438\u0448\u043a\u043e\u043c \u0431\u043e\u043b\u044c\u0448\u043e\u0439<\/td>\n<td>\u0421\u043b\u0438\u0448\u043a\u043e\u043c \u0431\u043e\u043b\u044c\u0448\u043e\u0439<\/td>\n<td>\u041d\u0438\u0436\u0435 \u043d\u0430\u0440\u0443\u0436\u043d\u043e\u0433\u043e \u0434\u0438\u0430\u043c\u0435\u0442\u0440\u0430 \u043f\u043e\u0441\u0430\u0434\u043a\u0438<\/td>\n<td>4:1 \u0442\u043e\u043b\u044c\u043a\u043e<\/td>\n<\/tr>\n<tr>\n<td>3 mm<\/td>\n<td>\u0421\u043b\u0438\u0448\u043a\u043e\u043c \u0431\u043e\u043b\u044c\u0448\u043e\u0439<\/td>\n<td>\u0421\u043b\u0438\u0448\u043a\u043e\u043c \u0431\u043e\u043b\u044c\u0448\u043e\u0439<\/td>\n<td>\u0421\u043b\u0438\u0448\u043a\u043e\u043c \u0431\u043e\u043b\u044c\u0448\u043e\u0439<\/td>\n<td>\u041d\u0438 \u043e\u0434\u0438\u043d \u0438\u0437 \u044d\u0442\u0438\u0445 \u0442\u0440\u0435\u0445 \u043a\u0430\u043d\u0434\u0438\u0434\u0430\u0442\u043e\u0432<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u042d\u0442\u043e <strong>\u043a\u043e\u043d\u0442\u0440\u043e\u043b\u0438\u0440\u0443\u0435\u043c\u043e\u0435 \u0433\u0438\u043f\u043e\u0442\u0435\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0435 \u0441\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u0435<\/strong>, \u0430 \u043d\u0435 \u0443\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u043d\u044b\u0439 \u0441\u043f\u0438\u0441\u043e\u043a \u0440\u0430\u0437\u043c\u0435\u0440\u043e\u0432. 2 mm \u0440\u0430\u0437\u043d\u0438\u0446\u0430 \u043c\u0435\u0436\u0434\u0443 \u043f\u0440\u0435\u0434\u043f\u043e\u043b\u0430\u0433\u0430\u0435\u043c\u044b\u043c \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u043d\u044b\u043c \u043e\u0442\u0432\u0435\u0440\u0441\u0442\u0438\u0435\u043c \u0438 \u043f\u0440\u043e\u0445\u043e\u0434\u043d\u044b\u043c \u043d\u0430\u0440\u0443\u0436\u043d\u044b\u043c \u0434\u0438\u0430\u043c\u0435\u0442\u0440\u043e\u043c \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043f\u0440\u0438\u043c\u0435\u0440\u043d\u044b\u043c \u0437\u0430\u0437\u043e\u0440\u043e\u043c, \u0430 \u043d\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0443\u0435\u043c\u044b\u043c \u0437\u0430\u0437\u043e\u0440\u043e\u043c. \u0424\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0434\u043e\u043f\u0443\u0441\u043a\u0438, \u043c\u043e\u043d\u0442\u0430\u0436\u043d\u044b\u0439 \u0434\u043e\u043f\u0443\u0441\u043a \u0438 \u0434\u043e\u043f\u0443\u0441\u0442\u0438\u043c\u044b\u0439 \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u043e\u0441\u0442\u0430\u044e\u0442\u0441\u044f \u043d\u0430 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0443.<\/p>\n<p>\u041f\u043e\u0441\u043b\u0435\u0434\u043d\u044f\u044f \u0441\u0442\u0440\u043e\u043a\u0430 \u0438\u043c\u0435\u0435\u0442 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435: \u0434\u0430\u0436\u0435 4:1 \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e. \u0411\u043e\u043b\u0435\u0435 \u0432\u044b\u0441\u043e\u043a\u043e\u0435 \u0441\u043e\u043e\u0442\u043d\u043e\u0448\u0435\u043d\u0438\u0435 \u0440\u0430\u0441\u0448\u0438\u0440\u044f\u0435\u0442 \u043d\u043e\u043c\u0438\u043d\u0430\u043b\u044c\u043d\u044b\u0439 \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d, \u043d\u043e \u043d\u0438 \u043e\u0434\u043d\u0430 \u043c\u0430\u0440\u043a\u0438\u0440\u043e\u0432\u043a\u0430 \u043d\u0435 \u0433\u0430\u0440\u0430\u043d\u0442\u0438\u0440\u0443\u0435\u0442 \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0438\u0435 \u043f\u0440\u0438 \u043a\u0430\u0436\u0434\u043e\u043c \u043f\u0435\u0440\u0435\u0445\u043e\u0434\u0435. \u0418 \u043d\u0430\u043e\u0431\u043e\u0440\u043e\u0442, \u043f\u0435\u0440\u0432\u0430\u044f \u0441\u0442\u0440\u043e\u043a\u0430 \u043d\u0435 \u0434\u0430\u0435\u0442 \u043d\u0438\u043a\u0430\u043a\u0438\u0445 \u0440\u0430\u0437\u043c\u0435\u0440\u043d\u044b\u0445 \u043f\u0440\u0438\u0447\u0438\u043d \u0434\u043b\u044f \u043e\u0442\u043a\u043b\u043e\u043d\u0435\u043d\u0438\u044f 2:1 \u0442\u043e\u043b\u044c\u043a\u043e \u043f\u043e\u0442\u043e\u043c\u0443, \u0447\u0442\u043e \u0434\u043e\u0441\u0442\u0443\u043f\u0435\u043d 4:1.<\/p>\n<h2>\u041f\u0440\u0435\u0432\u0440\u0430\u0442\u0438\u0442\u0435 \u043a\u0430\u043d\u0434\u0438\u0434\u0430\u0442\u0430 \u0441\u043e\u043e\u0442\u043d\u043e\u0448\u0435\u043d\u0438\u044f \u0432 \u0442\u043e\u0447\u043d\u044b\u0439 \u0440\u0430\u0437\u043c\u0435\u0440 \u0442\u0440\u0443\u0431\u043a\u0438<\/h2>\n<p>\u0414\u043b\u044f \u043a\u0440\u0443\u0433\u043b\u044b\u0445 \u0434\u0435\u0442\u0430\u043b\u0435\u0439 \u0438 \u0442\u0440\u0443\u0431\u043e\u043a \u0441 \u043e\u0442\u043a\u0440\u044b\u0442\u044b\u043c \u043a\u043e\u043d\u0446\u043e\u043c \u043f\u0440\u043e\u0432\u0435\u0440\u044c\u0442\u0435 \u043e\u0431\u0430 \u043f\u0440\u0435\u0434\u0435\u043b\u0430 \u0438\u0437 <strong>\u043e\u0434\u0438\u043d \u0442\u043e\u0447\u043d\u044b\u0439 \u0440\u0430\u0437\u043c\u0435\u0440 \u0440\u044f\u0434\u0430<\/strong>:<\/p>\n<ul>\n<li><strong>Minimum supplied ID &gt; largest pass-over OD<\/strong><\/li>\n<li><strong>Maximum freely recovered ID &lt; smallest landing OD<\/strong><\/li>\n<\/ul>\n<p>NASA <a href=\"https:\/\/standards.nasa.gov\/sites\/default\/files\/standards\/KSC\/F\/KSC-E-165-REV-F.pdf\" target=\"_blank\" rel=\"noopener\">KSC-E-165 \u0420\u0435\u0434\u0430\u043a\u0446\u0438\u044f F, \u00a73.8.1.1.1(a)<\/a> uses this expanded-larger\/recovered-smaller principle within Kennedy Space Center electrical ground-support-equipment fabrication. It supports the dimensional relationship, without approving a YOCL product or assembly.<\/p>\n<p>Retain the table&#8217;s minimum, maximum and \u00b1 signs, component tolerances and specified application allowance. Equality supplies no assured margin. A model&#8217;s stated application range may further restrict the usable diameters, even where the preliminary inequalities pass.<\/p>\n<p>If you increase the supplied size to clear a connector, recheck the recovered limit of that larger row. Changing the first diameter can also change the second. Use the <a href=\"https:\/\/yocl.com\/ru\/heat-shrink-tubing-size-chart\/\">\u0440\u0430\u0437\u043c\u0435\u0440\u043e\u0432 \u0442\u0435\u0440\u043c\u043e\u0443\u0441\u0430\u0434\u043e\u0447\u043d\u043e\u0439 \u0442\u0440\u0443\u0431\u043a\u0438<\/a> for the full lookup and limit conventions.<\/p>\n<h3>Free recovery is different from installed fit<\/h3>\n<p>A sleeve installed over a cable stops contracting against the surface inside it. In the hypothetical 4:1 example, a 4.5 mm jacket prevents the bore reaching its empty 3.75 mm endpoint. The endpoint therefore does not specify installed ID, outside diameter or wall thickness.<\/p>\n<figure class=\"wp-block-image\">\n<img decoding=\"async\" src=\"https:\/\/yocl.com\/wp-content\/uploads\/2026\/10\/2-1-vs-3-1-vs-4-1-heat-shrink-tubing-installed-fit.webp\" alt=\"Conceptual comparison of an empty 3.75 mm freely recovered bore and the same nominal 4:1 sleeve constrained by a 4.5 mm cable jacket\"><figcaption>Hypothetical 4:1 example: an internal jacket restricts recovery. Schematic wall thickness is illustrative; the free-recovery bore does not determine installed outside diameter.<\/figcaption><\/figure>\n<p>For a sleeve spanning several surfaces, check the smallest required landing as well as the largest feature it crosses. Irregular connectors, flat busbars, bundles and branches need their actual envelope and contact geometry reviewed; one round OD cannot describe every gap or valley.<\/p>\n<h2>A real YOCL 3:1 vs 4:1 comparison<\/h2>\n<p>\u041a\u043e\u044d\u0444\u0444\u0438\u0446\u0438\u0435\u043d\u0442 <a href=\"https:\/\/yocl.com\/ru\/product\/3-1-zero-halogen-single-wall-heat-shrink-tubing\/\">3:1 Zero-Halogen single-wall product<\/a> \u0438 <a href=\"https:\/\/yocl.com\/ru\/product\/4-1-zero-halogen-single-wall-heat-shrink-tubing\/\">4:1 Zero-Halogen single-wall product<\/a> offer a useful same-construction comparison. Both declare no internal adhesive. Their 20 mm supplied-bore entries have different recovered limits:<\/p>\n<table>\n<thead>\n<tr>\n<th>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u043d\u043e\u0435 \u043f\u043e\u043b\u0435<\/th>\n<th>3:1 single wall<\/th>\n<th>4:1 single wall<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Size entry<\/td>\n<td>20.0\/6.7 mm<\/td>\n<td>20.0\/5.0 mm<\/td>\n<\/tr>\n<tr>\n<td>Minimum supplied ID<\/td>\n<td>20.0 mm<\/td>\n<td>\u226520.0 mm<\/td>\n<\/tr>\n<tr>\n<td>Maximum ID after recovery<\/td>\n<td>6.7 mm<\/td>\n<td>\u22645.0 mm<\/td>\n<\/tr>\n<tr>\n<td>\u0412\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0438\u0439 \u043a\u043b\u0435\u0439<\/td>\n<td>\u041d\u0435\u0442<\/td>\n<td>\u041d\u0435\u0442<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>These are manufacturer declarations from the respective dimension tables, checked 9 October 2026. The 3:1 page establishes minimum and maximum through its column headings; the 4:1 page also prints the inequalities in each row.<\/p>\n<p>For hypothetical <strong>18 mm pass-over and 6 mm landing<\/strong> dimensions, both supplied minima clear the large feature. The 3:1 row&#8217;s 6.7 mm recovered maximum does not establish contraction below 6 mm; the 4:1 row&#8217;s 5.0 mm maximum does. That makes the latter a dimensional candidate, still subject to allowance and application review. It does not prove a sealed joint.<\/p>\n<p>Keep the published 6.7 mm limit. Replacing it with 20 \u00f7 3 would substitute nominal arithmetic for the actual declaration.<\/p>\n<h2>Check construction and duty alongside the ratio<\/h2>\n<p>The unlined 4:1 example shows why ratio cannot identify adhesive. Where a bonded interface is required, select an appropriate lined product and assess compatibility, contact geometry and sealing evidence. Use the <a href=\"https:\/\/yocl.com\/ru\/single-wall-vs-dual-wall-heat-shrink-tubing\/\">\u0441\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u0435 \u043e\u0434\u043d\u043e\u0441\u043b\u043e\u0439\u043d\u043e\u0439 \u0438 \u0434\u0432\u0443\u0445\u0441\u043b\u043e\u0439\u043d\u043e\u0439 \u043a\u043e\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u0438<\/a> for that decision.<\/p>\n<p>Compare actual wall fields and their measurement states rather than assuming 4:1 is thicker or stronger. Also check coverage and declared longitudinal change, permitted recovery conditions, service temperature, electrical duty and required environmental evidence for the exact grade. Diameter ratio supplies none of those values.<\/p>\n<p>A tight exterior or visible adhesive at an end cannot by itself verify the complete sealing interface. If an installed sleeve is already loose, damaged or has an unverified seal, the <a href=\"https:\/\/yocl.com\/ru\/why-heat-shrink-tubing-splits-or-fails-to-seal\/\">heat-shrink failure guide<\/a> addresses that separate investigation.<\/p>\n<h2>Make the final choice from the products that pass<\/h2>\n<p>Keep 2:1 in consideration when its exact size meets both fit checks and the required function. Move to 3:1 or 4:1 when their documented recovery range solves a transition the lower-ratio candidate cannot cover. If several products pass, compare their construction, installed space, process and duty. If none passes, revise the exact size or connection arrangement instead of assuming extra heat will deliver extra recovery.<\/p>\n<p>For a YOCL size review, provide the largest pass-over dimension, smallest landing dimension, required coverage, jacket material and intended duty through the <a href=\"https:\/\/yocl.com\/ru\/heat-shrink-tubing-manufacturer\/#range\">\u0430\u0441\u0441\u043e\u0440\u0442\u0438\u043c\u0435\u043d\u0442 \u0442\u0435\u0440\u043c\u043e\u0443\u0441\u0430\u0434\u043e\u0447\u043d\u044b\u0445 \u0442\u0440\u0443\u0431\u043e\u043a<\/a>. Request the matching size limits, permitted application range and installation information so the final selection identifies a product and size, not just \u201c4:1 heat shrink.\u201d<\/p>\n<h2>\u0421\u0441\u044b\u043b\u043a\u0438<\/h2>\n<ul>\n<li>\u041a\u043e\u0441\u043c\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0446\u0435\u043d\u0442\u0440 \u0438\u043c\u0435\u043d\u0438 \u041a\u0435\u043d\u043d\u0435\u0434\u0438 \u041d\u0410\u0421\u0410 \u2014 <a href=\"https:\/\/standards.nasa.gov\/sites\/default\/files\/standards\/KSC\/F\/KSC-E-165-REV-F.pdf\" target=\"_blank\" rel=\"noopener\">KSC-E-165 Revision F, 20 December 2021<\/a>, <em>Electrical Ground Support Equipment Fabrication, Specification for<\/em>. \u00a73.8.1.1.1(a), printed page 59; scoped expanded\/recovered size principle.<\/li>\n<li>YOCL \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u0435 \u2014 <a href=\"https:\/\/yocl.com\/ru\/product\/3-1-zero-halogen-single-wall-heat-shrink-tubing\/\">3:1 \u0422\u0435\u0440\u043c\u043e\u0443\u0441\u0430\u0434\u043e\u0447\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u043a\u0430 \u0441 \u043e\u0434\u043d\u043e\u0439 \u0441\u0442\u0435\u043d\u043a\u043e\u0439, \u0431\u0435\u0437 \u0433\u0430\u043b\u043e\u0433\u0435\u043d\u043e\u0432<\/a>. 20.0\/6.7 mm row, dimension headings and absence of adhesive; checked 9 October 2026.<\/li>\n<li>YOCL \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u0435 \u2014 <a href=\"https:\/\/yocl.com\/ru\/product\/4-1-zero-halogen-single-wall-heat-shrink-tubing\/\">4:1 \u0422\u0435\u0440\u043c\u043e\u0443\u0441\u0430\u0434\u043e\u0447\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u043a\u0430 \u0441 \u043e\u0434\u043d\u043e\u0439 \u0441\u0442\u0435\u043d\u043a\u043e\u0439, \u0431\u0435\u0437 \u0433\u0430\u043b\u043e\u0433\u0435\u043d\u043e\u0432<\/a>. 20.0\/5.0 mm row, supplied\/recovered bounds and absence of adhesive; checked 9 October 2026.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Choose the shrink ratio from the diameter transition the tubing must bridge. Its supplied bore must clear the largest feature, and its freely recovered bore must be smaller than the narrowest surface it needs to grip. A suitable 2:1 size can already complete that job. Consider 3:1 or 4:1 when the actual dimensions require a [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":3075,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[165],"tags":[],"class_list":["post-3076","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-heat-shrink-insulation"],"_links":{"self":[{"href":"https:\/\/yocl.com\/ru\/wp-json\/wp\/v2\/posts\/3076","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yocl.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yocl.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yocl.com\/ru\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/yocl.com\/ru\/wp-json\/wp\/v2\/comments?post=3076"}],"version-history":[{"count":1,"href":"https:\/\/yocl.com\/ru\/wp-json\/wp\/v2\/posts\/3076\/revisions"}],"predecessor-version":[{"id":3077,"href":"https:\/\/yocl.com\/ru\/wp-json\/wp\/v2\/posts\/3076\/revisions\/3077"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yocl.com\/ru\/wp-json\/wp\/v2\/media\/3075"}],"wp:attachment":[{"href":"https:\/\/yocl.com\/ru\/wp-json\/wp\/v2\/media?parent=3076"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yocl.com\/ru\/wp-json\/wp\/v2\/categories?post=3076"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yocl.com\/ru\/wp-json\/wp\/v2\/tags?post=3076"}],"curies":[{"name":"\u0441\u0430\u043b\u044c\u043d\u0438\u043a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}