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Writer's pictureDavid O'Callaghan

Key Repair - How long should my key last?

How long should your key last? - Well, its complicated...

Keys on a table in penrith

The life expectancy of your keys and your door locks is an important consideration when upgrading or managing your home security. While we often think of locks as sturdy, long-lasting fixtures, the truth is that their longevity can vary widely depending on factors like quality, usage, and maintenance. In this article, we’ll explore how long you can expect your locks to last, what impacts their lifespan, and what we can do to extend the life of your keys and locks.

Average Lifespan of a Door Lock


Rusty door lock

On average, a well-made door lock can last anywhere from 5 to 20 years before showing signs of wear and tear. That’s a broad range, and the lifespan of your lock depends heavily on the quality of the lock itself and how it's used. High-quality locks from trusted brands are designed to withstand tens of thousands of key turns, but even the best locks are subject to wear over time.

Factors That Impact the Lifespan of Your Lock

Several factors can influence how long your locks last. Here's a breakdown of the most important ones:

  1. Lock Quality The material and design of the lock are major determinants of how long it will last. High-end locks made from durable materials, often featuring advanced security features, tend to have a longer lifespan. Cheaper, lower-quality locks, on the other hand, can sometimes fail within a few months. especially under heavy use.

  2. Frequency of Use Locks that are used frequently, such as those on front doors, are more prone to wear and tear. A family of five using the same front door lock multiple times a day will wear it out much faster than a lock on a seldom-used side door. Over time, the internal mechanisms of the lock will degrade, causing the key to stick or the lock to jam.

  3. Environmental Conditions Where you live also plays a big role in the lifespan of your lock. Locks exposed to harsh

    conditions, such as salt air near the coast, extreme temperatures, or high humidity, can degrade more quickly. Moisture can cause rust, especially in locks that aren’t regularly maintained, and dust or dirt in dry environments can cause mechanisms to stick.

  4. Maintenance

    Regular maintenance is key to extending the life of your lock. Proper care includes periodic cleaning and lubricating the lock with a silicone-based lubricant. This reduces friction and helps prevent internal components from wearing out too quickly. Neglecting basic maintenance can cause locks to fail much sooner than expected. And please NO GRAPHITE!!!.... While graphite is a lubricant commonly recommended for certain locks, it's generally not ideal for the average household lock. The problem with graphite is that once it enters the lock cylinder, it doesn't have anywhere to go. Over time, as more graphite accumulates inside the lock, it can actually clog up the internal components instead of keeping them running smoothly. This buildup eventually causes more harm than good, leading to jams and other issues that reduce the effectiveness of your lock. Opt for a silicone or graphite-free lubricant to keep your locks working efficiently without the risk of clogging.


  5. Wear and Tear Over time, even the best locks experience wear and tear. The often brass pins inside a lock cylinder can wear down, causing the key to turn less smoothly. Keys themselves can also wear out, especially if they’re made from softer metals. A worn key can damage the internal components of the lock, shortening its lifespan.

Old keys hanging on a hook

Signs Your Lock Is Nearing the End of Its Life

While some locks can last for decades, others may show signs of wear much sooner. Here are a few signs it might be time to repair or replace your lock:

  • Difficulty Turning the Key: If your key has become harder to insert or turn, this could be a sign that the lock’s internal components are wearing out. Sometimes, this can be solved by lubricating the lock, but if the problem persists, a replacement may be necessary.

  • Rust or Corrosion: Visible rust or corrosion on the exterior of the lock is a clear indicator that the lock is degrading, especially if it’s been exposed to moisture. Rust can affect the internal mechanisms and cause the lock to fail.

  • Loose or Stiff Deadbolt: If you need to use excessive force to turn the deadbolt, or if it feels loose when you lock or unlock the door, these are signs the lock is worn and may soon fail.

  • Misaligned Door Latch: Sometimes, the lock may feel difficult to engage due to a misaligned door latch. This can happen when the door warps from temperature changes or moisture, putting extra stress on the lock.

How Can You Extend the Life of Your Locks?



Old padlock on a lockbox

With proper care, you can maximize the life of your locks and delay the need for replacement. Here are a few tips to help you get the most out of your door locks:

  1. Lubricate Regularly: Apply a silicone-based lubricant to the lock at least once or twice a year. This helps keep the internal components working smoothly and prevents rust.

  2. Clean the Lock: If your lock is exposed to dust, dirt, or salt air, clean it periodically to prevent buildup. Avoid using oil-based lubricants, which can attract dust and grime.

  3. Check for Wear: Inspect your keys and locks regularly for signs of wear. If you notice any rough edges on your key or difficulty turning it, consider having a new key cut or consulting a locksmith about a replacement lock.

  4. Protect from the Elements: For locks that are exposed to extreme weather, consider installing weatherproof covers or applying a corrosion-resistant treatment to protect the lock from moisture and rust.

  5. Realign the Door: If you notice that your door latch is misaligned, adjust the strike plate or the door frame to relieve pressure on the lock. This can prevent unnecessary wear and tear on the locking mechanism.

When Should You Replace Your Lock? If your lock or key is showing significant signs of wear or if maintenance doesn’t seem to improve its performance, it may be time to replace the lock altogether. In some cases, locks can be rekeyed, but if the lock is old or damaged beyond repair, a full replacement may be the safest option.

Additionally, upgrading your locks to higher-security models can be a wise investment, especially if your current locks don’t meet modern standards for home security. Consult a locksmith to explore options for more durable, secure, and weather-resistant locks.


So, while a lock can last anywhere from 5 to 20 years, its true lifespan depends on factors like quality, usage, and maintenance. By taking the time to care for your locks with regular cleaning and lubrication, you can extend their lifespan and ensure your home stays secure. If you notice signs of wear or difficulty using the key, don’t hesitate to contact a locksmith to evaluate your locks and make recommendations for repair or replacement.

At Keys O'Callaghan Locksmiths, we specialise in lock installation, key repairs, and lock repairs to ensure your property stays secure. If you're unsure whether your lock needs replacing or just a professional service, feel free to reach out for expert advice, we’re here to help!

Keys O'Callaghan Locksmiths is your trusted, affordable choice for key repairs and lock repairs across Penrith, the Blue Mountains, and surrounding suburbs. Whether you need quick lock repairs or professional key services, we deliver reliable solutions tailored to your needs and budget. - The team at Keys O'Callaghan Locksmiths

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