Bumping: a locksmith explains

Bumping is a manipulation technique that can affect certain cylinders. Understand its limitations and which protections to check in your lock.

What to consider when choosing security against bumping

With security against bumping, four elements should be separated: lock case, cylinder, escutcheon and key control. A door can have a good lock and remain vulnerable if the cylinder is exposed or copies are uncontrolled.

The choice for security against bumping depends on the attacks it should resist, door compatibility and daily use. A brand or label is not a substitute for checking the installed system.

Technical checks for security against bumping

• Dimensions, profile, cam and lock operation relevant to security against bumping.
• Manipulation, extraction and drilling protection appropriate for security against bumping.
• Escutcheon, fixings, door alignment and key-copy control around security against bumping.

A common situation before deciding

Someone notices that the key turns badly and asks about security against bumping. Before selling a cylinder, we establish whether friction comes from the cylinder, lock case or a misaligned door; replacing the wrong part does not remove the symptom.

The mistake worth avoiding

With security against bumping, replacing only the visible component can move the weakness elsewhere. Forcing it, using unsuitable lubricant or continuing with a bent key can also worsen the fault.

How we work before, during and after

For security against bumping we measure, test with the door open and closed, and review key control before recommending hardware.

Work on security against bumping ends with checks of key movement, locking, fixings and the handover of keys or a security card where applicable.

Frequently asked questions about security against bumping

What affects the price?

The price of security against bumping depends on compatible hardware, protection level and any door or lock adjustment. We identify these before replacement.

What information helps before a visit?

For security against bumping, send a front photo, one of the door edge while open and a description of key movement. Do not photograph security-card codes.

See the professional service related to security against bumping