How to Properly Lubricate a Lock

Doesn't sound like much, but proper lubrication will extend the life of the lock and the keys, and will help prevent freezing in cold weather.

Difficulty: Easy

Instructions

Things You'll Need:

• lubricant (see Tips)
• rag
• key that fits lock

1. 
    
   Deadbolt

   Hold rag loosely around lock while spraying lubricant into the lock. Wipe away any overspray. See Tips (below) for suggestions on the type of lubricants to use. If using an aerosol or similar spray-type lubricant, be sure to use a tube (straw) to direct the spray into the keyway.

2. 
    
   Commercial Grade Locks

   Fully insert key into lock, then withdraw without turning key. Wipe the key off on the rag. This method helps pull dirt and debris out of the lock. Repeat until the key comes out clean.

3. Use the rag again to clean any excess lubricant or debris from the face of the lock. Only after the key comes out of the lock free of any dirt or debris should any attempt be made to turn the key in the lock.
   
   Any time a lock is removed from the door, it is not a bad idea to lubricate the moving parts of the lock and latch. Latches can fail due to lack of lubrication. The same lubricants as are used in the lock keyway may be used to lubricate the latch. Gears or metal-to-metal contact points may also be lubricated with a spray lithium grease, which is also great for door hinges.

Tips & Warnings

• Graphite is a time-tested lock lubricant, however it can be quite messy. When a lock, lubricated with graphite, is disassembled, you may end up with a small pile of dirty graphite on the floor. Very difficult to clean.
• Many aerosol lubricants are available that do a fine job of cleaning and lubricating locks. Avoid petroleum-based lubricants. PTFE or teflon-based lubricants usually do a very good job. Your local locksmith may carry specialty lubricants better suited to locks than anything you might find at a hardware store.
• Lubricate all locks. On your vehicles, that may include door locks, ignition locks, glove compartment locks, fuel door locks, and/or trunk locks. At home, be sure to lubricate padlocks as well as all door locks.
• Lubricants that are designated "water-displacing" are especially well-suited for locks that are exposed to harsh environments and freezing weather.
• Some locks act as electrical switches. Be sure that any lubricants used in these situations are designated as suitable for electrical connections.

Resources

• Altic Lock Service