How to Add a Lock to a Metal File Cabinet

Adding a lock to a metal file cabinet is a great way to secure sensitive documents and valuables. A locked cabinet prevents unauthorized access and gives you peace of mind. Fortunately, installing a lock is a straightforward process than can be done in just a few steps.

Choosing the Right Lock

When selecting a lock for a metal file cabinet, you have a few options:

Key Lock

This is the classic file cabinet lock. A key lock requires a physical key to open. Keys can be duplicated, so only give copies to trusted individuals. Key locks are simple and reliable.

Combination Lock

A combination lock uses a numeric code to unlock. This avoids the need to track physical keys. However, the code could still be shared or observed surreptitiously. Change the combination occasionally for better security.

Electronic Lock

For advanced protection, choose an electronic lock. These locks use keycards, fingerprints, or Bluetooth to unlock. They offer the highest level of security but also tend to be the most expensive option.

Lock Strength

Check the lock’s security level before purchasing. Look for labels like “UL 437” for locks tested to withstand physical attacks. Higher security locks will have more complex internal mechanisms.

Preparing the Cabinet

Before installing a new lock, make sure the cabinet is ready:

• Empty the drawer contents to provide clear access to the locking bar.
• Locate the pre-drilled holes on the drawer where the lock will be attached. If there are no holes, you may need to drill them yourself.
• Clean dust, grease or debris from the locking bar and pre-drilled holes. This allows the lock to fit tightly.
• Measure the distance between the pre-drilled holes to buy the correctly sized lock.
• Obtain the necessary tools – typically a screwdriver, lock, and keys or combination.

Installing the Lock

With the right parts in hand, you’re ready to add the lock:

Step 1 – Insert Lock Cylinder

The main lock cylinder fits into the pre-drilled hole toward the front lip of the drawer. Push the cylinder into place but don’t tighten it all the way.

Step 2 – Position Lock Bar

The locking bar slides over the arm at the rear of the lock cylinder. Place the bar so the holes align with the cabinet’s pre-drilled holes.

Step 3 – Attach Bolts

Slide bolts through the holes on the locking bar and cabinet. Tighten the bolts with a screwdriver to hold the bar firmly in alignment with the lock cylinder.

Step 4 – Tighten Lock Cylinder

Finally, tighten the main lock cylinder with the included keys or combination dial. Check that the lock engages correctly by turning the key or dial.

Step 5 – Test Operation

Open and close the drawer several times to confirm smooth operation. The locking bar should slide easily when unlocked. If needed, loosen bolts and adjust the alignment.

Using and Maintaining the Lock

Once installed properly, a file cabinet lock requires minimal ongoing care:

• Lubricate the locking bar occasionally with a dry lubricant spray to prevent sticking.
• Protect keys or the combination code to avoid unauthorized access.
• Consider changing combinations or replacing lost keys over time.
• Ensure tightened bolts remain tight – loose bolts can reduce security.
• Call a locksmith if the lock fails and needs replacement or repair.

With simple installation, a file cabinet lock boosts security and protection for your documents. Be sure to choose a sturdy lock and install it correctly for long-lasting performance. Keep the keys or combination limited to trustworthy individuals only. A locked metal cabinet deters opportunistic snooping and gives you satisfaction when storing sensitive materials.

Frequently Asked Questions About Adding Locks to Metal File Cabinets

Can I install a lock on any metal file cabinet?

Most standard vertical filing cabinets can accommodate a lock, provided they have pre-drilled holes. Check for these holes near the slide bar inside the drawer. If holes are not present, you may be able to drill them yourself.

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

Basic tools like a screwdriver, drill (optional), and lubricant spray are normally sufficient. The lock kit will include the cylinder, keys or combination dial, locking bar, and bolts. Cabinet locks usually come in standard sizes.

How do I know which lock size to get for my cabinet?

Measure the distance between the pre-drilled holes inside the drawer to determine the correct lock size. Locks are commonly available in 2-3/4″, 3″ and 5″ sizes. Match this measurement for a proper fit.

How can I get a key made for an existing file cabinet lock?

Take the original key to a locksmith or hardware store. They can use the key to decode the lock and cut a duplicate key for you. You’ll need to prove you own the cabinet.

What should I do if my file cabinet lock stops working?

Try lubricating the slide bar and ensuring the lock cylinder is tightened properly. If that fails, you may need to replace the old lock. A locksmith can remove the non-working lock and install a new one for you.

Can I match a new lock to use my existing keys?

Yes, you can buy a lock that is keyed alike to match your existing keys. Bring one of the original keys to the locksmith or hardware store to find a matching lock. This avoids having to replace all keys.

How often should I change the combination on a combination lock?

It’s wise to periodically change the combination by resetting it to new numbers, such as once a year. This prevents former employees or others from accessing a cabinet long after gaining your combination.

How do I safeguard the keys or combination to my file cabinet lock?

Avoid labeling keys or writing down combinations. Instead, commit them to memory or secure them in a location only you access. Don’t share keys or combinations widely to reduce the chance of compromise.

Can I put a lock on a wooden file cabinet?

Yes, you can add a lock to a wooden vertical file cabinet using the same installation process. Ensure the wooden cabinet has pre-drilled holes for attaching the slide bar. If not, carefully drill pilot holes yourself.

Conclusion

Installing a lock on a metal filing cabinet is a wise precaution to prevent identity theft or the loss of important documents. With basic DIY skills, you can add a lock yourself in just a few easy steps. Choosing the right lock and properly positioning the slide bar will result in years of reliable security. Be diligent about restricting access to keys or combinations. A locked file cabinet is one of the most effective ways to safeguard sensitive materials in your home or office. With minimal maintenance, the lock will operate smoothly when you need to securely store critical files.