I'm not an expert. Said me never. Anyway, I need help cutting through all the fluff, as the padlock industry seems to be full of companies claiming to have the most secure lock. As we all know, not everybody can be making the most secure lock.
The padlock will be used to secure a chain back onto itself. I'm leaning toward 5/8" grade 80 but might spring for 3/4" grade 80. If a guy comes in with bolt cutters I want him to cry. Then I want the handle of his bolt cutters from harbor freight to shatter and leave fragments in his groin.
I'm not sure of the economics - I could almost double up 5/8" chain for the same money (not including additional locks) as a single 3/4" chain. Using a hacksaw or a grinder or similar, a single 3/4" chain only provides 72% of the steel in cross section as doubled 5/8" chain. In other words to cut through two 5/8" chains is 39% more work. Sadly, it's also twice as much work to unlock
with the key. I do wonder however if a single 3/4" chain would provide superior resistance to bolt cutters, as there will be far fewer sets of cutters out in the wild that can handle that chain. So in a situation where a thief can cut 5/8" but not 3/4", he will be defeated by a 3/4" chain even though there is less material to cut. Same guy using a saw, however, might prefer to cut the single, larger chain.
Maybe it's academic because I'd rather have a single chain and a single lock for simplicity. The weight of the chain does not matter as this is a stationary installation.
I have considered security chain but they don't seem to sell it in a diameter that gets me out of the bicycle security arena and I'm not securing bicycles.
Circling back, I also need a padlock that is a match for the strength of whatever chain I choose.
Fire away.
This is the chain I'm looking at BTW. Grade 80 Chain
The padlock will be used to secure a chain back onto itself. I'm leaning toward 5/8" grade 80 but might spring for 3/4" grade 80. If a guy comes in with bolt cutters I want him to cry. Then I want the handle of his bolt cutters from harbor freight to shatter and leave fragments in his groin.
I'm not sure of the economics - I could almost double up 5/8" chain for the same money (not including additional locks) as a single 3/4" chain. Using a hacksaw or a grinder or similar, a single 3/4" chain only provides 72% of the steel in cross section as doubled 5/8" chain. In other words to cut through two 5/8" chains is 39% more work. Sadly, it's also twice as much work to unlock
Maybe it's academic because I'd rather have a single chain and a single lock for simplicity. The weight of the chain does not matter as this is a stationary installation.
I have considered security chain but they don't seem to sell it in a diameter that gets me out of the bicycle security arena and I'm not securing bicycles.
Circling back, I also need a padlock that is a match for the strength of whatever chain I choose.
Fire away.
This is the chain I'm looking at BTW. Grade 80 Chain