Can an Angle Grinder Cut Through a Bike Lock?
When securing your bicycle, choosing the right lock is crucial. While a good quality U-lock is extremely difficult to cut, some bike locks are not as invincible as they seem. In this article, we explore whether an angle grinder can cut through a bike lock, and delve into the various factors that influence lock security.
The Challenge of U-locks
A high-quality U-lock is designed to be robust, with a larger diameter and solid steel construction, making it challenging to cut through. However, even these locks can be defeated with the right tools and techniques.
Cable Locks vs. U-locks
Cable locks are more vulnerable to quick and easy hacks. If a thief has the right tool and only a few minutes, he can bypass the lock without much trouble. In contrast, a U-lock can withstand attempts to break it open, even with two pry bars.
Common Lock Pick-Offs
People often bring their bikes to our shop because they have lost the key to an old cable lock or forgotten the combination. Using my Felco brand cable cutters, I can cut through a cable lock in less than 15 seconds. These Swiss-made cutters, costing only $75, remain sharp and effective for many years, unlike the cheaper alternatives that my co-workers prefer.
The Cost and Efficiency of Cutter Tools
The cost of lock-cutting tools is a deciding factor. While more expensive, high-quality cutters like the Felco are built to last and continue to perform well. Cheap cutters, on the other hand, need frequent sharpening and often break, leading to more significant expenses in the long run.
Does More Expensive Mean Better?
Yes, the idea is to make life difficult for a thief. If they have to work to steal a bike, they might give up and find an easier target. However, determined thieves will still find ways to break through any lock, no matter how sturdy.
Angle Grinders and Expensive Locks
Despite their robust design, high-end U-locks can still be cut with the right power tool. For example, the 18mm Faeuhtaboutit Kryptonite lock, priced around $135, would take a typical cord-powered angle grinder about 2 hours and 30 blades to cut through. Therefore, even with multiple expensive locks, the cutting process still takes a considerable amount of time and resources.
Additional Measures to Secure Locks
For an extra layer of protection, some owners impregnate the shackles with diamond-impregnated grip tape. This makes the lock even harder to cut while still being cumbersome for normal use. Another method is welding diamond-impregnated grinder blades to the outside of the lock, which makes cutting more difficult but also scratches the bicycle.
Responsible Security Practices
While some locked bikes still risk theft, there are measures to mitigate the risk. For instance, many insurance policies and bike regulations require locks that can withstand a constant one-hour attack. However, even with these protections, bike thieves are often determined enough to find ways around them.
Ultimately, the goal is to make the task of stealing a bike as difficult as possible. This may convince would-be thieves to choose an easier target, but it is crucial for cyclists to remain vigilant and secure their bikes appropriately.