Heat Shrink for USB A and USB C - Sizes?

maplenexus on 17/09/2020 - 11:32

hello,

just wondering if anyone who has done heat shrink on USB cables, namely on USB A (the usb port for laptops/computers) and USB C.

im not sure what sizes on ebay i should purchase, ive asked various sellers but they pretty much give out those generic one liner responses (hello, thanks for your mail, plz check description, thanks).

i measured my USB C end and the circumference is about 30mm? and the USB A end circumference is under 40mm. online calculator says a 30mm circumference is about 0.37 inches (is this about 3/8 inches?) or under 10mm (9.5mm).

does phi mean diameter?

32pcs x φ3.0 x 40mm is 3cm in diameter?

pic of frayed USB C end https://imgur.com/a/qQxUCUs.

can anyone suggest a size to get? otherwise i might fork out to get those 300+ pieces 500+ pieces of heat shrink on ebay.

Electrical & Electronics

Comments

  • Krankite on 17/09/2020 - 12:05

    Have you considered either self fusing tape or Sugru? both make a good option for cable repair.

    • maplenexus on 17/09/2020 - 13:11

      i've just watched a video abou sugru, never heard of it before will compare if its cheaper / easier than heat shrink

  • AndyC1 on 17/09/2020 - 13:23

    I suggest you get some electrical tape to re-enforce the area then use heat shrink.
    There are two common types of heat shrink, one that halves in diameter and one the shrinks to 1/3 it's diameter. The cheap heat shrink is the one that shrinks to 1/2.
    Saying that the diameter you buy is before it shrinks.

    I would go to a jaycar store and buy both the tape and heat shrink before you snap some of the wires and while you are there buy a replacement USB cable as it WILL break.

    • maplenexus on 17/09/2020 - 13:40

      alright thanks, will check out jaycar. i have an abundance of usb cables just wanted to protect them all before they start to fray like this one.

      i think i tried normal tape / electrical tape before but it didnt wrap up too cleanly so it ended up looking quite ugly…

  • abb on 17/09/2020 - 13:54

    does phi mean diameter?
    32pcs x φ3.0 x 40mm is 3cm in diameter?

    Diameter is normally signified by Ø, but phi looks pretty much the same.

    I would expect the units to be the same if unspecified, so I think your example is a 3mm (un-shrunk) diameter.

    • maplenexus on 17/09/2020 - 14:38

      yeah thought ph might be diameter, just wanted to double check.

      if φ3.0 is diameter of 3mm (unshrunk) then its mighty tiny, i dont think it would even fit through a usb c cable head. ive asked for clarification with some sellers so i'll see what they say. thanks for your input

      • abb on 17/09/2020 - 15:10

        its mighty tiny

        eh, 1.5mm is a common size when joining single wires

        i dont think it would even fit through a usb c cable head

        agreed

  • dcuksuop on 17/09/2020 - 13:55

    try a hot glue gun

  • roastchook on 17/09/2020 - 15:15

    Try Jaycar. You can see what size you need.

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