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Old 12-02-08, 10:45 PM   #1
wesbos
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Got a free frame, Kryptonite Lock locked on

Hey everyone, a local shop owner gave me a frame that was attached to his fence for quite some time (has been striped of pretty much everything). When he took down the fence he just cut the fence, leaving the lock on the frame.

I've looked around at suggestions for doing this, but I want to get some first hand experience. Its a Kryptonite Keeper lock (all black). Its not the type that can take a bic pen. I was thinking that I would need to take this to a welder or something to get it cut off. Whats the cheapest way of doing this?
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Old 12-02-08, 10:49 PM   #2
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A good cut off wheel will do it... make sure you wear adequate protection as the sparks will be flying and the wheel throws off crap at very high speed.

Jeans, work boots, and safety glasses are a minimum.
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Old 12-02-08, 11:53 PM   #3
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You can try a hacksaw blade. It may just be slow. You can buy abrasive hacksaw blades that are supposed to be able to cut glass.

A muffler shop will have a torch, or any friend that does welding.
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Old 12-03-08, 12:10 AM   #4
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Is it a standard or long shackle design? A stubby bottle jack will pop it open like magic.
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Old 12-03-08, 12:42 AM   #5
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A hacksaw with a good, fine tooth blade is all you need. I know from experience.
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Old 12-03-08, 08:31 AM   #6
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angle grinder with a cutoff wheel. Regular grinder wheel will work, just take a lot longer.
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Old 12-03-08, 08:45 AM   #7
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Plastic explosive is probably not the way to go.
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Old 12-03-08, 09:50 AM   #8
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Plastic explosive is probably not the way to go.
Yeah.. That could be a bit "messy"
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Old 12-03-08, 09:54 AM   #9
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Actually det cord would do very nicely with minimal shielding.

I second the cut-off wheel idea. You'll need several. The fibrous jobs throw a considerable amount of debris and I strongly--based on experience--recommend a full face shield and goggles.
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Old 12-03-08, 09:58 AM   #10
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I took one off with a cutting torch. wrapped the frame with wet towels. Full sized torch now, 3 ft oxy and acetylene bottles, not one of the little home torches.
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Old 12-03-08, 12:12 PM   #11
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Linear shaped charge. Used it several times at my day job. Cuts just about anything, with minimal damage to the surrounds, if you design it right.
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Old 12-03-08, 12:49 PM   #12
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Just as a note, if you decide to go with anything that throws sparks, cover the frame. If you have some old jeans that would probably work.
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Old 12-03-08, 06:36 PM   #13
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Since the frame was so valuable that it was left outside for a considerable length of time, you might consider cutting away the frame to save the Kryptonite.

Last edited by gldrgidr; 12-03-08 at 06:44 PM.
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Old 12-03-08, 10:09 PM   #14
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Since the frame was so valuable that it was left outside for a considerable length of time, you might consider cutting away the frame to save the Kryptonite.
...and shouldn't there be a serial number stamped on the lock somewhere from which you could just order keys?
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Old 12-04-08, 04:22 PM   #15
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Just ask any meth addict. He'll have the lock off in seconds.
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Old 12-04-08, 07:29 PM   #16
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Jeans, work boots, and safety glasses are a minimum.
yeah, a shirt would just be overkill.
and i second the det cord, except well...not.

angle grinder is your best bet. Personally, I would just grab the plasma cutter from work and have it off in 30 seconds, but not many people have access to one.
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Old 12-04-08, 07:39 PM   #17
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I like how whenever this question pops up, everyone suggests using the big guns.

If someone needs to ask this question, they likely do not have immediate access to grinders, recip saws, plasma torches, etc. Buying one of these tools is probably not cost affective for this singular purpose.

A hacksaw with a good blade and some time in the garage is all this is necessary. Anything else is a convenience and a luxury.

Last edited by jjvw; 12-04-08 at 09:03 PM.
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Old 12-04-08, 09:02 PM   #18
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Can't the guys at the bike shop figure out how to get the lock off?
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Old 12-04-08, 09:45 PM   #19
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I like how whenever this question pops up, everyone suggests using the big guns.

If someone needs to ask this question, they likely do not have immediate access to grinders, recip saws, plasma torches, etc. Buying one of these tools is probably not cost affective for this singular purpose.

A hacksaw with a good blade and some time in the garage is all this is necessary. Anything else is a convenience and a luxury.
There are tool rental companies all around the country. Auto parts stores loan tools now. There's no shortage of access to the right tool for any job.
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Old 12-04-08, 09:50 PM   #20
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Wanna know the bestest, cheapest way to get one of those off?

Dig in the trunk of your car. Find your jack. If it's a scissor style jack, you're in luck. Put the jack in the "U". Crank away with the jack handle. U-Lock parts like warm cheese.

(Learned from a bike thief)
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Old 12-05-08, 07:06 AM   #21
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I do have to agree that if you can get a key, it is more than a little bit possible that the lock is the most valuable piece you have. =)
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Old 12-05-08, 08:04 AM   #22
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+1 on the scissor jack

I recall in the late 1970s/early '80s a gang of MIT nerds decided to "Take the Kryptonite Challenge" and had frightening success once they acquired a tank of liquid nitrogen.
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Old 12-05-08, 12:09 PM   #23
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I don't know about the jack method, the liquid nitrogen method, etc. I know those methods HAVE been used, but whether they work on a specific lock is a different matter. Lock makers can tweak geometry and materials somewhat to counteract one threat or another, once they know about it.
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Old 12-05-08, 01:14 PM   #24
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Take it to your local fire dept. They'll cut it for you in two seconds. They have tools designed to quickly get into anything.
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Old 12-05-08, 07:45 PM   #25
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...and shouldn't there be a serial number stamped on the lock somewhere from which you could just order keys?
This is a scary thought. All a thief needs to do is get the serial number and he can order keys? At the local train station bikestands, I see the same bikes every day. Within a week or two, a thief could have the key to steal the bike of his choice.
The lock companies should at least demand a sales receipt, before they send out replacement keys.
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