This is a reply to all your posts about the struts.
My plan is to obtain samples from all the manufacturers and do a side-by-side comparison. I will post pictures and all test info once I get all those samples.
At this time I have received samples from one of the manufacturers.
The problem with the Stabilus is that their sample units are very expensive and I want to make sure there is interest in their struts before I order samples. You know, it makes no sense to order samples, pay for them as if they are made of solid gold and then not order any more...
For now I told them that their price is too high and we are continuing negotiations. I hope they’ll back down a little.
I don’t know if their struts are twice as good as the others. There’s no way for me to know. As I’ve stated before, the warranty is pretty much the same at 2 years and 30.000 cycles for all manufacturers. Every manufacturer says that anything over two years is just “extra” and you should expect replacing the struts after about 3 years. This includes Stabilus struts. The fact is that our struts were designed to offer some margin for aging. When the struts are new they hold the door up firmly. Then, as the strut ages and looses it’s pressure it will still hold the door fully open but the force holding it up will be less. All manufacturers allow up to 10% force loss during the warranty period. According to my calculations a pressure drop of about 20% would still allow the door to stay fully up. So, taking worst case scenario into calculation and assuming the force will drop by 10% in two years, the door would stay fully open for more than 4 years. That is the WORST CASE SCENARIO. If the strut looses about 5% per two years then we’re looking at about 9 years before replacement is needed. **
** – this is just a theoretical calculation! You can’t hold me to it if your strut needs replacement after the two year warranty period. During the first two years the strut will be replaced free of charge if it fails.
Greetings from Poland!
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Tom, thank you for staying on this project. My suggestion would be that you evaluate a sample strut from each manufacturer and choose the one that you evaluate to be the best without considering price---unless there is little quality and performance difference between the two top choices. If there is not much difference and the number two choice is $20 to $35 each cheaper I would prefer the cheaper set.
My bottom line is I need a set of struts and will not buy them until you have them or notify us that you have given up on the effort.
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Posted by: "Tom" <dmctom@xxxxxxxxx>
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