*This post may contain affiliate links. As an Amazon Associate we earn from qualifying purchases.
If you own the cabinet and lost the key, the safest way in is usually not force — it is checking for a spare key, identifying the lock code, or replacing the lock instead of damaging the door. On many arcade cabinets, the lock is just a simple cam lock, which means there may be an easier, cleaner path than prying the coin door or drilling straight through it.
The big thing to know is that not every arcade machine is held shut the same way. Some use generic keyed-alike cam locks, some use tubular or barrel-style locks, and some doors are being held by screws, the cam itself, or another piece of hardware rather than the lock cylinder. If the cabinet is collectible or you want to keep the original hardware, that changes the best option right away.
What to check before you force anything
Before you try to pry, drill, or turn the lock with a tool, inspect the cabinet carefully. On real-world machines, the lock is not always the part that is actually holding the door shut.
- Check the coin door, back door, and any service panel. Some cabinets hide a spare key inside, taped to the inside of the door or left in the lower cabinet by a previous owner or operator.
- Look at the cam and retaining hardware. If the cam is missing, loose, bent, or installed incorrectly, the door may be stuck for reasons that have nothing to do with the key.
- Look for obvious screws or fasteners. A door can sometimes be held by added hardware, not the lock itself.
- Find the lock code if one is stamped on the cylinder. A replacement key-by-code may be possible on some common cabinet locks.
- Identify the lock type. Flat-key cam locks, keyed-alike cabinet locks, and tubular locks are not all equally easy to deal with.
If the cabinet is rare, original, or in good collectible condition, stop here before you damage the lock. In that case, preserving the original cylinder is often worth more than saving ten minutes.
How to identify the lock type
This matters because the best fix depends on the hardware.
| Lock type | What it usually means | Best next move |
|---|---|---|
| Generic cam lock with a flat key | Common on many arcade cabinets and coin doors | Check for a spare key, search for a key code, or replace the lock if originality does not matter |
| Keyed-alike replacement lock | Several cabinets may share the same key pattern | Try any spare key from the same machine family or previous owner, then match by code if possible |
| Tubular / barrel-style lock | More annoying to deal with and less likely to have an easy universal key answer | Call a locksmith or replace the lock; do not assume a generic key will work |
| Door that is not actually locked by the cylinder | The cam, screws, or another fastener is the real problem | Fix the hardware first before doing anything destructive |
Community experience from arcade collectors is pretty consistent here: many cabinets were built with convenience in mind, not high security. That is why old spare keys, keyed-alike cylinders, and replacement cam locks are so common. At the same time, front and back locks are often not the same key, even on the same cabinet family.
The safest step-by-step order
- Search for a spare key first. Check the inside of the cabinet, the back panel, the coin door area, and any documentation or parts bag you received with the machine.
- Inspect the lock face for a code. If the cylinder has a readable code, a locksmith or key service may be able to cut a replacement key without destroying anything.
- Test the door gently after confirming the cam is the real latch. If the cam is loose, missing, or misaligned, the lock may turn but the door still will not open.
- Call a locksmith if you want to preserve the original hardware. This is the best move for collectible machines, uncommon locks, or cabinets with a tubular lock.
- Replace the lock if originality does not matter. For many arcade cabinets, a replacement cam lock is cheaper and cleaner than spending time trying to save an old cylinder.
- Drill only if you accept damage and plan to replace the lock. This is the last resort, not the default.
If you are trying to keep the cabinet original, the locksmith route usually makes the most sense. If you only need the cabinet open quickly and you are fine replacing the hardware afterward, swapping the lock is often simpler than trying to rescue a worn-out cylinder.
When drilling is the last resort
Drilling the lock will usually destroy the cylinder, so do this only when you are comfortable replacing it afterward. It is the common fallback when speed matters more than saving the original lock.
The main advantage is that you are targeting the lock itself instead of prying up the door frame. Done carefully, that can mean less damage to the cabinet body than brute force. The downside is obvious: once the cylinder is ruined, you should expect to install a new lock assembly.
For a vintage or valuable machine, drilling should be the last option. If the cabinet matters to you, a locksmith is usually the cleaner way to get back in.
Common mistakes that make the job worse
- Assuming every cabinet uses the same key. Some do share keys, but many front and back locks differ.
- Skipping the inside inspection. If a screw or missing cam is the real problem, you can waste time damaging a lock that was never the real issue.
- Forcing a lock that should be replaced. A worn-out cylinder may just crumble or jam harder.
- Using brute force on a good cabinet. Prying a coin door can bend the frame and make the repair more expensive than a replacement lock.
- Keeping no spare after you finally get in. This is how the same problem happens again a month later.
What to do after you get the cabinet open
Once the door is open, take a minute to make the cabinet easier to service next time.
- Write down the lock code if there is one.
- Make a spare key or replace the cylinder with a known lock number.
- Check whether the cam, retaining nut, or door hardware is worn out.
- Test the door before closing it again so you know the latch works correctly.
- If the cabinet is collectible, keep the original parts in a labeled bag in case you want to reverse the change later.
If you are restoring multiple machines, this is also a good time to standardize the locks across your cabinet collection so you do not end up with a different key for every door.
A quick decision guide
- Cabinet is collectible or original hardware matters: try the code, spare key, or locksmith first.
- Cabinet is common and you only need access: replace the lock if you cannot find a key.
- Door will not move even when the lock seems open: check the cam, screws, and latch hardware.
- Lock is tubular/barrel style: treat it as a locksmith-or-replace job, not a universal-key problem.
- You need it open right now and do not care about the cylinder: drilling is the last resort.
That same no-nonsense serviceability is part of what made old arcade cabinets so practical in the first place, and it is why so many operators kept the hardware simple across different machines. If you enjoy the history behind these cabinets as much as the repair work, Galaga vs Galaxian is a good reminder of how often classic arcade hardware was built for easy service, not modern security.
Frequently asked questions
Can one key open multiple arcade machines?
Sometimes, yes. Many cabinets and replacement cam locks were keyed alike or used common patterns. That said, front and back doors are not always the same, and you should not assume a random old key will work on every cabinet.
What if the lock turns but the door still will not open?
That usually means the cam, latch, or another fastener is still holding the door shut. Check the inside hardware before you keep forcing the cylinder.
Is drilling the fastest way to open an arcade cabinet?
Usually, yes — but it is destructive. If the cabinet matters to you, a locksmith or replacement key-by-code is the better first choice.
Are tubular arcade locks harder to deal with?
In practice, yes. Collector discussions consistently point to tubular locks as more of a locksmith-or-replace situation than a quick universal-key fix.
Should I keep the old lock after replacing it?
If the machine is original or collectible, yes. Even a damaged cylinder can be useful later for matching codes, parts, or restoration references.
If you are just trying to get back into a cabinet you own, the shortest path is usually: inspect first, identify the lock type, try a spare or code, and replace the lock before you start damaging the door. That approach saves the cabinet far more often than brute force does.