What does it mean when a key has been getting stiff for weeks?
A key that has been getting stiffer over weeks is a warning that something in the system is wearing out: the key, the cylinder inside the lock, or the way the door lines up with its frame. It is worth dealing with now, because a stiff key is the one most likely to snap off in the lock.
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The nuance is where the stiffness lives. If the key is hard to turn only when the door is shut, the door alignment is the likely cause. If it is stiff even with the door open, the key or the cylinder is the likely cause.
Why a key gets stiff over time
Keys and cylinders wear together. Every turn rubs a little metal off the key and the parts inside the lock. Over months and years the cuts on the key round off and the keyway collects wear and dirt. The key then has to be forced past parts it used to slide by.
A worn copy is a common cause. A key cut from another copy can carry small errors, so it fits less cleanly than the original. A bent key, or one with a hairline crack, behaves the same way.
The door itself matters too. If the door has dropped slightly on its hinges or the frame has shifted with the seasons, the bolt rubs against the strike plate and the key feels stiff even though the lock is fine. Keys also snap more easily in cold weather and in worn cylinders, so a key that has been stiffening for weeks was warning of exactly this.
What you can check yourself
- Try your spare keyIf a spare turns smoothly, the problem is your everyday key and a fresh copy cut from the spare may solve it. If the spare is stiff too, the lock is the likelier cause.
- Look at the keyCheck for bends, cracks, or cuts that look rounded and shiny compared with a newer key. A key in that state is due for replacement before it breaks.
- Test with the door openTurn the key while the door is open. If it is easy then but stiff when the door is closed, the alignment of the door and bolt is the likely cause, not the cylinder.
- Do not force itTurn with normal pressure only. Extra force on a stiff key is how keys snap. Leave glue and household oils out of the lock altogether.
When to call a locksmith
Call when the stiffness has lasted weeks, when it is getting worse, or when the spare key is stiff too. Also call straight away if the key has already snapped, and leave the broken piece alone. Pushing it further in with another key or a pin usually turns a simple extraction into a cylinder replacement. To arrange a visit, call (866) 690-5848. One Call Locksmiths is a referral and scheduling service, and an independent locksmith does the work.
The locksmith looks at the lock first and gives you the price. Work starts only when you agree it, and the estimate is free. If a door has to be opened as part of the visit, the locksmith asks for identification and proof that you are entitled to enter the home, premises or vehicle before opening anything. A driver's licence showing the address, a lease, a utility bill, or vehicle registration or insurance will do. If you are locked out because a key snapped, have one of these ready.
What the locksmith will do
- Find the causeThe locksmith works out whether the key, the cylinder or the door alignment is behind the stiffness, and tells you which.
- Remove a broken piece if there is oneIf the key has snapped, the broken piece is extracted and the cylinder checked for damage.
- Replace the cylinder when neededIf the keyway is chewed or worn, the cylinder is replaced rather than left to fail again.
- Cut a new keyA new key is cut from the surviving half, or from the lock itself, so you are not relying on a worn copy.
- Lubricate and check the doorThe lock is lubricated and the door alignment checked so the problem does not come back.
Related questions
- Can I just put oil in a stiff lock?
- It is best not to. Household oils can gather dirt and make the lock worse over time. A locksmith can lubricate the lock properly while checking whether the cylinder needs replacing.
- Should I get a new key cut if mine is stiff?
- A fresh copy from a good original often helps if the old key is worn. If the lock itself is worn, a new key will still feel rough, so the cylinder needs a look as well.
- Does a stiff key mean I need a new lock?
- Not always. The cause can be a worn key or a door that has shifted out of line. A locksmith can tell you which it is, and you agree the price before any work begins.
- What if the key snaps before I get it fixed?
- Leave the broken piece where it is and do not push it further in. Call a locksmith to have it extracted. The locksmith will check identification and proof that you are entitled to enter before opening anything.
- How is licensing handled for locksmiths?
- It varies by state. Some states license or register locksmiths, others leave it to cities or counties, and some do not regulate the trade. Check with your own state or city. One Call Locksmiths holds no licence and claims none.
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