When selecting the correct heat shrink tubing it is important to consider the following parameters:
Wall thickness of heat shrink tubing:
The material thickness will be indicated in mm after complete shrinkage. "Nominal" defines dimensions without any tolerances.
Generally you can distinghuish between thin wall, medium wall and thick wall heat shrink tubing.
Heat shrink tubings are also available with adhesive liner. They are also called dual tubing.
Diameter of heat shrink tubing:
For thin wall tubing with a shrink ratio of 2:1 (standard tubing) the diameter is usually in inch sizes 25.4 mm equals 1 inch.
Depending on the used compound material and wall thickness heat shrink tubing can be extruded to a different degree.
The shrink ratio indicates the rate, the product shrinks (supplied diameter in relation to recovered diameter). The shrink ratio varies from 2:1 to 6:1. The higher the shrink ratio, the more varying diameters of the object can be covered. Thus, fewer sizes of heat shrink tubings are needed.
This helps to reduce stock and so requires less space.
Longitudinal change after shrinkage:
Heat shrink tubings do not shrink only in diameter, but generally also in length. This change in length after shrinking is indicated in a percentage
Minimum shrinkage temperature:
Heat shrink tubings do not all shrink at the same temperature. It strongly depends on the type of compound they are made of and their wall thickness.
The operating temperature varies per tubing type. This is dependent of the compound used for the tubing type
When selecting the correct heat shrink tubing size, it is recommended to follow the 80:20 rule.
Heat shrink tubing should shrink by at least 20% and not more than 80% of the supplied diameter to achieve the optimal result.
In our application overview for heat shrink tubings you will find the recommended heat shrink tubing size for every cable diameter.
The 80:20 rule has of course been taken into account.
Heat shrink tubings are used for cable harness assembly in general. The application of heat shrink tubings covers insulation, cable identification and, besides esthetical reasons, mechanical protection as well.
Find the right heat shrink tubing even quicker: The practical heat shrink tubing selection guide.
With the comprehensive range of heat shrink products it can sometimes be difficult to choose the product that best fits your needs.
Therefore HellermannTyton has designed a very practical selection disc for our heat shrink tubing which takes you straight to the product you are looking for. Order your heat shrink tubing selection guide today and convince yourself!
The selection disc shows the important properties of our tubing at a glance and quickly finds the right solution for your specific requirements.
The heat shrink tubing selection disc gives you the overview you need and helps you navigate through our wide variety of products.
The symbols indicate which heat shrink tubing has the properties you are seeking.
The colour coding helps you focus on the relevant properties.
The reverse side of the heat shrink tubing selection disc gives you an overview of the different heat shrink tubing sizes and guides
you in selecting the correct heat shrink tubing size.
Useful tools for selecting the right heat shrink tubing
shows the appropriate size of heat shrink tubing for your special application.
Simply enter your data and the calculator presents the fitting sizes according to the 80:20 rule.
Hint: The heat shrink calculator also checks, whether the chosen heat shrink tubing really fits your application. Among others heat
shrink tubing can be selected by using the product search on our website www.hellermanntyton.co.uk/site/calculators/heatshrinkcalculator
If a heat shrink tubing is being shrunk the diameter as well as the wall-thickness will change. This calculator indicates the theoretical wall thickness for a given diameter.
Your expert regarding heat shrink tubings/heat shrink moulded shapes:
Insulation Product Manager
Tel.: +44 (0) 1752761245
Heat Shrink Tubing Selection Disc
Where To Buy
Find your specialist wholesaler for HellermannTyton Products.