Combination locks are everywhere - on lockers, suitcases, safes, bike locks. But do you really know what happens inside when you turn the dials to line up the numbers?

Combination locks might seem confusing, but how they work is pretty simple. Learning about the internal mechanism can help you fix any problems that come up.

The magic of combination locks is their basic design paired with exponentially more possible number combinations. More discs equals way more potential combos - a 3-disc lock has 1,000 combinations, while one with 4 discs has 10,000!

So let’s unlock the secrets behind combination locks!

How Do Combination Locks Work?

Inside a combination lock are metal discs stacked up. The edges of the discs have notches cut into them. Each disc is marked with the numbers 0 to 9. When you turn the dial, the discs spin around to line up the notches.

When you dial in the correct combination number sequence, the notches on all the discs align with the drive cam, allowing the lock to open. If the notches don’t line up properly, the drive cam can’t move, so the shackle or cable remains locked.

The genius of the combination lock is its simplicity paired with exponentially increased possible combinations. Adding more discs increases the possible number sequences astronomically.

Common Combination Lock Issues and How to Troubleshoot Them

After using a combination lock a lot, problems can start happening. Here are some common issues and tips to fix them:

The Safe Remains Locked Even After Entering the Combination

This is often caused by wear and tear on the discs and notches. Try slowly turning the dial back and forth while applying gentle pressure. This may realign the discs. Spraying a dry lubricant like graphite powder can also help.

The Dial Gets Stuck and Won't Turn Past Specific Numbers

Dirt, rust or bent/worn parts could be jamming the mechanism. Try a dry lubricant first. If that doesn’t work, you may need to replace the discs or dial mechanism.

You Can't Remember the Combination

If it’s your own lock, try birthdays, anniversaries or other memorable numbers. For a lock you don’t know the combination to, call a professional locksmith to open it for you. They have tools to decode and crack the sequence.

Looking for a Professional Locksmith?

Combination locks are clever gadgets, but they can have issues after heavy use. Learning how they work inside and some problem-solving tips can help you fix many problems on your own.

But if you've tried everything and your combo lock still isn't working right, it's time to call the pros.

Our skilled experts at Clockwork Locksmiths can help with any combo lock problem. Our many years of experience means we have the knowledge and tools to tackle any combination lock challenge.

We're mobile locksmiths serving Sydney and surrounding suburbs. Our professional and friendly technicians can open jammed safes, decode forgotten combinations, make replacement keys and service and repair all lock types.

Don’t spend hours in frustration - give us a call at 1800 256 259 for quick, reliable service 24/7. Or check out our website for more about the locksmith services we offer. We look forward to helping you ‘crack’ any combination lock troubles!