Deterioration due to non-use?
I'm not sure this applies to these bellows and the rubber they are made from. I have seen with bicycle tires that not using them brings them to an early demise. The rubber rapidly deteriorates while the same tires that are used even infrequently last and last.
The explanation I have heard is that the rubber has some natural oxidation protectants added into the recipe that only come to the surface when the rubber is flexed. Even occasional use will replenish the protective layer on the surface.
I suppose that if the parts are being stored somewhere cool and dark with minimal exposure to the atmosphere, then this isn't an issue.
I'm not sure this applies to these bellows and the rubber they are made from. I have seen with bicycle tires that not using them brings them to an early demise. The rubber rapidly deteriorates while the same tires that are used even infrequently last and last.
The explanation I have heard is that the rubber has some natural oxidation protectants added into the recipe that only come to the surface when the rubber is flexed. Even occasional use will replenish the protective layer on the surface.
I suppose that if the parts are being stored somewhere cool and dark with minimal exposure to the atmosphere, then this isn't an issue.