I'd say the difference between an "8" cut resistance and a "9" cut resistance is about half a minute. This web page from Master Lock explains cut resistance:
'Master Lock - Choose the Best Padlock - Master Lock'
formatting link
The thicker and harder the material the padlock shackle is made of, the higher it's cut resistance. Less expensive padlocks will have thinner shackles made of ordinary chrome plated steel. Better padlocks will have thicker shackles made of much harder steels so they're more resistant to being cut.
But, the bottom line is that if someone has an 24 Volt cordless angle grinder fitted with a metal cutting abrasive disk, they're going to cut through any shackle on any padlock within a few minutes at the most.
So, if all you have is a lawn mower in the shed, I'd say you should buy a weather and corrosion resistant padlock to minimize the chances of it rusting inside, and tho he11 with it's cut resistance because an angle grinder will cut through any padlock shackle.
Before looking at a higher cut resistance lock, look at what it is locking. It may be easier to cut the hasp than the lock.
One day at work I needed to get into a room that was locked with a padlock. Could not cut the lock with some 3 feet long bolt cutters it was so hardened. Moved to the side of the lock and cut the hasp very easy.
It really gets down to how much noise they can make. A battery operated side grinder will make short work of any padlock. I also understand if you freeze one of those super hard locks, they will shatter when you hit it with a hammer.
And how often do burglars try to shoot the lock off, not counting television?
They make inexpensive "cover"s that go over the top part of a disk lock, you know, one that looks like a frisbee. I've never seen them for sale but maybe on the web. My friend who ran a ministorage gave me one. The lock can still be cut off with a angle grinder but it's harder I think, and even harder to get bolt cutters in there.
Her ministorage had no security. Anyone could drive in anytime, day or night, but burglaries were almost always by friends of the renters, or cohorts in some illegal business like drugs. Total strangers didn't come there to break into storage lockers. Maybe they know thaty most contain mostly junk that people can't part with.
How thick, compared to the locks we'd normqaly buy, was the shackle of the lock you cut open? Was it marked "hardened"? Was it a name brand (meaning if they said hardened, it really was.)?
48" gives twice the pressure that 24 does. Maybe a lot more if it opens so much wider that you get to use different muscles to close it. But its jaws have to be as hard as the shackle. I don't think those cheap Chinese bolt cutters, also about 24", I bought from JCWhitney
20 years ago were high quality. I bought them because they were so cheap.
BTW, can one un-harden a shackle by heating it with a propane or MAPP gas torch?
HomeOwnersHub website is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.