How to Put a Lock on a Metal File Cabinet

Putting a lock on a metal file cabinet is a great way to secure important documents and valuables. Here is a step-by-step guide on how to install a lock on a metal file cabinet.

Choose the Right Lock

There are a few types of locks that can be used on file cabinets:

Cam Lock

• A cam lock is a cylindrical lock that inserts into a hole in the drawer.
• It has a tailpiece that rotates 90 degrees when locked, preventing the drawer from opening.
• Cam locks are easy to install and provide adequate security for most home/office use.

Disc Tumbler Lock

• More secure than a cam lock.
• Uses a cylinder with pin tumblers that must align to open the lock.
• Installation is more complex but it can’t be easily picked open.

Padlock

• Simple and affordable option.
• Loop a padlock through an eyelet or hasp mounted to the cabinet.
• Provides basic security but the padlock is exposed and can be cut.

For a file cabinet, a cam or disc tumbler lock is recommended over a padlock for better security.

Installation Steps

Follow these steps to install a cam or disc tumbler lock on a metal file cabinet:

Step 1: Mark the Location

• Open the drawer where you want to install the lock.
• Mark the center point on the inside of the drawer. This is where the lock hole will be drilled.

Step 2: Drill the Lock Hole

• Use a drill with the appropriate sized bit for the lock. For a cam lock, a 7/16″ hole is standard.
• Drill straight through the inner panel of the drawer at your marked location.

Step 3: Install the Lock Cylinder

• Insert the lock cylinder into the hole and secure in place with a retaining screw.
• The cylinder should fit snugly without excess play.

Step 4: Attach the Tailpiece/Cam

• The tailpiece inserts into the lock cylinder.
• Position it horizontally with the cam pointed toward the drawer slide.

Step 5: Test the Lock

• Insert the key and turn it 90 degrees clockwise to lock.
• The tailpiece/cam should also rotate 90 degrees.
• Try pulling out the locked drawer to ensure it is secure.

Step 6: Install Lock on Other Drawers

• For multiple drawers, repeat steps 1-5 to install additional locks.
• Using the same key on all locks allows you to unlock them simultaneously.

And that’s it! With a few simple tools and following these steps, you can add reliable locks to your file cabinet. Protect important documents and possessions by always keeping the cabinet locked when not in use.

Tips for Using Your Locked File Cabinet

Follow these tips to get the most security and convenience from a locked file cabinet:

• Keep the key on your person or hidden safely nearby – never leave it in the lock.
• Consider using different keys for different drawers if storing very sensitive items.
• Lubricate the lock periodically with powdered graphite to keep it operating smoothly.
• Avoid forcing the key if the lock is stuck – this can break the key or lock.
• Install drawer locks starting from the top drawer down for better security.

FAQs About Locking File Cabinets

How do I remove an existing file cabinet lock?

• To remove a cam lock, unscrew the retaining screw and pull out the cylinder. For a disc tumbler lock, remove the exterior clip holding it in place.

What tools do I need to install a file cabinet lock?

• You’ll need a drill, drill bits, tape measure, pencil, screwdriver, and retaining clip if installing a disc tumbler lock. Always use sharp drill bits.

Where can I get a replacement file cabinet lock key?

• Take the original key to a locksmith to have a duplicate made. Know the manufacturer and model of the lock. The locksmith can match and cut a new working key.

How do I pick a locked file cabinet lock?

• Picking locks requires specialized tools and skills. It’s not recommended. Call a locksmith to have them professionally opened if keys are lost. Forcible entry will damage the cabinet.

Can I install a combination lock instead?

Yes, combination locks are available that replace the lock cylinder with a programmable push-button lock. This avoids having to manage keys. However, a lost combination can’t easily be replaced like keys.

Conclusion

Installing a high-quality cam or disc tumbler lock is a simple DIY project that immediately boosts the security of your file cabinet contents. Protect valuable documents, media, and possessions in your home or office by keeping file cabinets locked at all times. Follow the installation best practices outlined to enjoy years of trouble-free use. For extremely sensitive materials, considering upgrading to a fireproof/waterproof cabinet with advanced combination or biometric locks.