Heat shrink tubing: Difference between revisions

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Line 1: [[File:Schrumpfschlauch animated modified.gif\|thumb\|Animation of heat shrink tube before and after heating~~. The 4 core screened wire's screen has been separated and sleeved~~.]]'''Heat ~~Shrink~~shrink ~~Tubing~~tubing''' is useful for electrical insulation, color coding, cable bundling and mechanical protection. For electronics ~~1mm~~1 mm (1/16") fits component leads and will shrink to a skin tight fit. Otherwise the 1/8" and 1/4" diameter sizes are often useful.<ref name="jr">[http://www.justradios.com/heatshrinktubing.html '''Heat Shrink Tubing'''], JustRadios.com</ref> It is also available with adhesive inside. == Uses == To ~~thermally~~form ~~insulate~~a anthermally ~~[[exponential pair]], using a~~insulating sleeve over the transistor pair and [[tempco]] in an [[exponential converter]]. Strain relief on exposed connections, e.g. leads soldered on [[potentiometer]] tags. To terminate the insulation, e.g. after the screen has been separated ~~(and sleeved)~~ from the core wires and sleeved. Especially to sheath and insulate all exposed mains connections, e.g. the solder connections toon a front panel mains on/off switch. == Method == Normally a heat gun is used to shrink the sleeving, taking care not to damage nearby areas and to not overheat the sleeving. The heat from a soldering iron can be used, without touching the sleeving. Do not use a direct flame. A hair dryer won't be hot enough. == Shrink ratio == The shrink ratio is the approximate maximum amount the heat shrink tubing will fully shrink compared to its unshrunk diameter. For example, a 3/4" piece with a 3:1 shrink ratio will shrink down to a maximum diameter of approximately 1/4”. Tubing with a larger shrink ratio is more forgiving in fitting, and has a bit thicker wall thickness and slightly less flexibility when shrunk than a lower ratio product.<ref>[http://www.techflex.com/howtos/heatshrink.pdf How to work with heatshrink tubing...], Techflex How-Guide</ref> ==~~References~~ Useful sizes == To provide a degree of mechanical support for connections, e.g. to switches and jacks, a 1 cm length of 2.4mm heat-shrink will be fine for the the majority of wiring connections. For larger cables like power leads, use 6.4mm. Otherwise a small kit with short lengths of different diameter should cover. == References == {{reflist}} == External links == * [http://www.doityourself.com/stry/7-different-sizes-of-heat-shrink-tubing 7 Different Sizes of Heat Shrink Tubing] * Wikipedia: [https://en.wikipedia.org/wiki/Heat-shrink_tubing Heat-shrink tubing] [[Category:Wiring]]