Shrink ratio 6:1

The shrink ratio indicates how much a heat shrink tube reduces in diameter when heated. A 6:1 shrink ratio means that, after heating and full shrinkage, the diameter is six times smaller than the original diameter.

In the product specifications of heat shrink tubing, you will find both the ‘inner diameter as supplied’ and the ‘inner diameter after shrinkage.’ The shrink ratio defines the relationship between these measurements.

We offer heat shrink tubing in the following shrink ratios:

• 1.5:1
• 2:1
• 2.5:1
• 3:1
• 4:1
• 6:1

Follow these steps for the correct application of heat shrink tubing with a 6:1 shrink ratio:

• Measure the diameter of the cable where you will apply the heat shrink tubing. Also, determine the required length of the tubing.
• Choose the right type of heat shrink tubing based on your application. Does it need to be self-extinguishing? Flexible? Or is protection the primary concern?
• Select the correct diameter. The inner diameter after shrinkage should be slightly smaller than the diameter of the cable. For example, if the cable has a diameter of 3.5 mm, choose heat shrink tubing with an inner diameter after shrinkage of 3.2 mm. With a 6:1 shrink ratio, this means the original inner diameter as supplied would be 19 mm.
• Cut the heat shrink tubing to the correct length, place it over the cable, and heat it using a heat gun or soldering iron.

After heating, the heat shrink tubing will fit tightly around the cable, providing a secure and safe finish.

Are you unsure about the right type of heat shrink tubing for your application, or do you have questions about its use? Our specialists are happy to help. Contact us for personalized advice!