Construction

The size of the core is dependent on several factors. A smaller core will obviously allow more material to be stored in a given space. However, there is a limit to how tightly the stored material can be wound without damaging it and this limits how small the core can be.

Other issues affecting the core size include:

* Mechanical strength of the core (especially with big reels).
* Acceptable turning speed (for a given rate of material moving on or off the reel a smaller core will mean that an almost

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