How to Remove a Metal Filing Cabinet Lock

Removing a metal filing cabinet lock is a task that many office workers and homeowners face at some point. While filing cabinets often come with keys, over time these can become lost, broken or damaged. Thankfully, with some simple tools and techniques, these locks can usually be removed fairly easily. In this article, we’ll walk through the step-by-step process to remove a metal filing cabinet lock without damaging the cabinet itself.

Assessing the Lock

Before doing anything, you’ll want to examine the lock itself. Note what type it is (typically tubular or flat) and try the keys if you have them. If the keys work, great! If not, it’s time to look into other removal options. Some things to check:

• Is there a reset button? Some locks have a small hole on the bottom or back where a paperclip can be inserted to reset the lock. Try this before doing anything more drastic.
• Is it really stuck or just stiff? Try spraying lubricant into the keyhole and working the key back and forth. This can loosen stuck locks.
• Can you see the mechanism? Peering inside with a flashlight will let you view the inner workings to assess what kind of tools you’ll need.

Gathering Necessary Tools

To remove a stubborn metal filing cabinet lock, you’ll need:

• Lubricant such as WD-40
• Needle nose pliers to grasp and turn the cylinder
• Screwdriver to remove lock housing if needed
• Hammer and chisel to break lock if other methods don’t work
• Scrap cloth to protect cabinet finish from scratches

You likely won’t need every tool, but having them on hand can save time and frustration. Avoid improvising with makeshift tools which could further damage the lock or cabinet.

Removing Tubular Locks

Tubular locks are the most common. To remove:

1. Spray lubricant into the keyhole and around the cylinder.
2. Insert needle nose pliers into the keyhole and grasp the cylinder firmly.
3. Turn the pliers clockwise while pulling outward to extract the cylinder.
4. Check for any remaining pieces still stuck inside the lock housing. Remove with pliers if needed.
5. Clean out any lubricant, metal shards or grime before installing a new lock.

Removing Flat Locks

Flat locks contain a simple flat metal or plastic tab rather than a cylinder. To remove:

1. Pry off the lock housing by slipping a screwdriver under the edges and gently twisting.
2. Push the tab in with the screwdriver to disengage the lock.
3. Remove any remaining pieces of the tab from the cabinet.
4. Clean and lubricate the area before installing the replacement.

Drilling Out the Lock

If you can’t remove the cylinder or tab, a last resort is drilling out the lock:

1. Clamp the cabinet drawer tightly shut for safety.
2. Center the drill bit on the keyhole and drill slowly through the cylinder.
3. Insert a lock pick tool to disengage the remaining portion of the cylinder.
4. File down any remaining burrs thoroughly.
5. Clean away all metal shavings before installing a new lock.

Take care not to drill too large a hole or you may need to patch it later if the new lock doesn’t cover the damaged area.

Troubleshooting Tips

• Having a second person hold the drawer closed while working can help.
• If pliers slip, try taping or rubber-banding cloth around the jaws for better grip.
• Place painter’s tape over the area to prevent scratches.
• Apply lubricant generously and reapply frequently for sticky locks.
• Use progressively larger drill bits if needed to slowly drill out the cylinder.

Preventing Future Lockouts

To avoid finding yourself locked out of a metal filing cabinet again:

• Clearly label all keys and keep duplicates in a secure location.
• Consider installing locks with reset buttons rather than standard locking cylinders.
• Maintain cabinets with occasional lubrication and by testing keys periodically to ensure they work.
• Upgrade old locking systems to more secure and user-friendly options.
• Keep the cabinet in an accessible area so a key can be retrieved quickly if accidentally locked inside.

With some common tools and the proper technique, removing a stuck metal filing cabinet lock is usually a straightforward process. Pay close attention not to over-force the lock or damage the cabinet exterior. And take steps after removal to improve the locking system and prevent any repeats of this hassle. Your files will once again be securely at your fingertips in no time.

Frequently Asked Questions About Removing Metal Filing Cabinet Locks

1. How can I remove the lock cylinder if it’s recessed deep in the hole?
   • Use needle nose pliers with long, narrow jaws to reach into the recessed hole and grip the cylinder. Soak penetrating oil into the lock for a few minutes first to help loosen it.
2. I lost the key and broke the cylinder trying to remove it. How do I get the cabinet open now?
   • With the cylinder removed, the locking mechanism is disengaged even if parts remain inside. You should be able to simply open the drawer now. If not, the lock may be jammed and require further force or drilling to free it.
3. Do I need a professional locksmith to pick or extract the lock?

• While locksmiths have specialized tools, most standard metal cabinet locks can be removed successfully with common DIY tools and patience. Only utilize a locksmith for high-security or stubborn locks.

1. The replacement lock I bought doesn’t fit the existing hole. What should I do?
   • Filling the oversized hole with epoxy or wood filler then drilling to the size of the new lock is the best solution. Alternatively, purchase a lock guard plate to cover the hole.
2. I drilled out the lock but now the cabinet drawer is stuck. How can I open it?

• With the lock gone, the sliding mechanism may be jammed. Try lubricating the tracks, and gently but firmly pulling or prying the drawer open. If it absolutely won’t budge call a cabinet repair person.

1. Are lock picking tools an option for removing this type of lock?
   • While specialized lock picking tools do exist, most standard cabinet locks have simple mechanisms that don’t require advanced picking skills. Basic DIY tools are typically sufficient.

Conclusion

Removing old or damaged locks from metal filing cabinets is often necessary to restore access to your important documents and files. Thankfully with some common tools, patience and care, the average DIYer can tackle this project successfully. Focus on gently freeing the cylinder or tab from the housing without inflicting too much collateral damage. And take measures afterwards to avoid a repeat lockout down the road. Don’t let a sticky filing cabinet lock come between you and your essential records. With this guide, you’ll learn the ins and outs of quickly and affordably restoring access for good.