1. Door Locks Unlocking the Mystery: A Practical Guide for Homeowners and DIYers

Ever wondered how the humble door lock really works? Whether you’re trying to boost your home’s security, tackle a DIY repair, or simply satisfy your curiosity, understanding how your locks function is a great first step. SAVERSTREET are offering in this guide, a break down of the key parts of a lock, explain the differences between common types, and offer essential maintenance tips straight from the pros.

Let’s get into it and if you want to look into standards please visit Master Locksmiths

What Are the Main Parts of a Door Lock Called?

First things first—there are two main categories of locks: mechanical and electronic.

– Mechanical locks use a traditional key and are simpler to operate (and sometimes fix).
– Electronic and smart locks add convenience through keypads, card readers, or smartphone apps, but require professional servicing if things go wrong.

In this guide, we’re focusing on mechanical locks—since they’re more common in homes and easier to understand. Here are the essential components you’ll come across:
– Cylinder
– Bolt/Latch
– Spring Bolt
– Deadbolt
– Box
– Spindle
– Strike Plate
– Door Handle

️ Common Door Lock Types and Their Parts

Let’s explore the specific lock styles you’re likely to encounter—and what makes each one tick.

1. Mortice Locks

Popular for both interior and exterior doors, mortice locks come in two choices: sashlocks (with a latch and deadbolt) and deadlocks (deadbolt only).

Components:
– Lock case
– Latch
– Deadbolt
– Deadbolt knob
– Spindle/latch follower
– Springs
– Cylinder hole
– Forend
– Strike plate

2. Deadbolt Locks

Favoured for front doors, deadbolts are sturdy and often meet British Standard BS3621 for security.

Types:
– 5-lever mortice deadlock
– 3-lever deadlock

Parts include:
– Bolt
– Latch
– Lock cylinder
– Keyway & key pins
– Thumbturn (optional)
– Strike plate
– Faceplate
– Optional backplate

3. Rim Locks

Typically used on wooden doors or as secondary locks. They sit on the surface of the door rather than inside.

Components:
– Lock body
– Latch bolt
– Keyhole & key cylinder
– Optional thumbturn
– Strike plate
– Faceplate
– Backplate
– Knob

4. Euro Cylinder Locks

Common on uPVC and composite doors, especially with multipoint locking systems.

Types include:
– Double
– Thumbturn
– Single
– Half thumbturn

Key components:
– Cylinder body
– Keyway
– Key and driver pins
– Springs
– Cam
– Anti-snap protection (optional)
– Thumbturn

5. Knob Locks

Found on many interior doors, knob locks are simple and easy to install.

Parts include:
– Knob
– Spindle
– Latch
– Lock cylinder
– Keyway

6. Lever Handle Locks

These locks are ergonomic and a favourite for commercial spaces and accessible environments.

Components:
– Lever handle
– Spindle
– Latch
– Lock cylinder
– Keyway

Best Practices for Door Lock Maintenance

Want your locks to last and perform well? Follow these expert tips:
– Lubricate – Use graphite or silicone-based lubricant.
– Tighten – Periodically check and tighten screws.
– Align deadbolts – Ensure bolts slide cleanly into the strike plate.
– Upgrade when needed – Replace worn-out locks for better security.

Final Thoughts

Understanding how your door locks work isn’t just for locksmiths. It empowers you—whether you’re a homeowner, renter, or DIYer—to make smarter decisions about your security.
Whether you stick with a tried-and-true Euro cylinder or go high-tech with a smart lock, the most important thing is choosing a setup that gives you confidence and peace of mind.

For more technical information please visit BSI