What a mechanical keyboard switch actually is

A mechanical keyboard switch is a small component under each key that registers when you press it. Unlike the rubber domes under most laptop and office keyboards, a mechanical switch uses a spring and a stem that move up and down inside a plastic or metal housing. When you press the key, the stem pushes down, the spring compresses, and at a certain point in that motion the switch sends an electrical signal to your computer. When you release the key, the spring pushes the stem back up.

The reason this matters is that mechanical switches feel and sound different from rubber domes, and they wear differently over time. A rubber dome keyboard might feel mushy and require you to press all the way down to register a keystroke. A mechanical switch registers the keystroke partway through the press, and the tactile feedback tells you exactly when that moment happens. This is why people who type a lot, or who play games that require fast repeated keypresses, often prefer mechanical keyboards.

Key Takeaways

  • Mechanical switches use a spring and stem that move inside a housing, while rubber domes use a collapsing rubber bubble under the key.
  • Different switch types — linear, tactile, and clicky — feel and sound different because of how the stem moves and what interrupts that motion.
  • The actuation point is the moment partway through the press when the switch registers; knowing this helps you understand why some switches feel faster or more responsive.
  • Mechanical switches last longer than rubber domes because the spring and stem are more durable, though the lifespan varies by switch type and quality.

Linear switches: smooth all the way down

A linear switch has a stem that moves straight down without any interruption or resistance change. You press it, it slides down smoothly, and at a certain depth (usually around 2 millimeters down from the top) it registers the keystroke. You keep pressing until the stem bottoms out, then you release and the spring pushes it back up. The entire motion feels uniform — no bumps, no clicks, no sudden changes in how hard you have to push.

Linear switches are popular for gaming because the smooth motion means you can press and release quickly without having to think about where the actuation point is. They are also quieter than other mechanical switches because there is nothing interrupting the stem's motion to create noise. Common linear switches include Cherry MX Red, Gateron Red, and Akko switches. The trade-off is that without tactile feedback, you have to rely on sound or muscle memory to know when the keystroke registered.

Tactile switches: a bump in the middle

A tactile switch has a small bump or ridge on the stem that creates resistance partway through the press. When you push down, the stem slides smoothly until it hits that bump, and you feel a sudden change in how hard you have to push — a small jolt or notch. That bump is usually where the switch registers the keystroke. After you feel the bump, the stem continues down to the bottom with less resistance.

The bump gives you physical feedback that the keystroke registered without requiring you to bottom out the switch. This is useful for typing because you can press and release as soon as you feel the bump, which reduces fatigue and can improve accuracy. Tactile switches are louder than linear switches because the bump creates a small sound as the stem passes over it, but quieter than clicky switches. Popular tactile switches include Cherry MX Brown, Gateron Brown, and Holy Panda switches.

Clicky switches: a bump and a click

A clicky switch combines the bump of a tactile switch with a separate mechanism that creates an audible click sound. Inside the switch housing is a small metal leaf or bar that the stem strikes as it passes through the actuation point. That collision produces a sharp clicking noise — the same sound you hear in old typewriters. The click happens at the same moment as the tactile bump, giving you both physical and audio feedback that the keystroke registered.

Clicky switches are the loudest mechanical switches and are popular with people who like the sound and feel of typing, or who want very clear feedback that each keystroke registered. They are less common in gaming keyboards because the noise can be distracting in competitive play, and the click mechanism adds a tiny amount of delay compared to linear switches. Cherry MX Blue and Gateron Blue are the most common clicky switches. If you share a workspace or live with others who sleep while you work, clicky switches are usually not the right choice.

Actuation point and travel distance

The actuation point is the depth at which the switch registers your keystroke, measured in millimeters from the top of the key. Most mechanical switches actuate between 1.5 and 2.2 millimeters down. The travel distance is how far the stem travels from the top to the bottom, usually between 3.5 and 4 millimeters. This means the switch registers your keystroke before you reach the bottom, and you have extra distance to press if you want to.

Some switches are designed with a shorter actuation point or shorter total travel distance. A switch that actuates at 1.5 millimeters instead of 2 millimeters will feel slightly faster and more responsive because the keystroke registers sooner. A switch with 3.5 millimeters of travel instead of 4 millimeters will bottom out sooner, which some people find tiring and others find more efficient. The difference is small but noticeable if you type or game for hours at a time.

How switch durability compares to rubber domes

Mechanical switches are rated by the number of times the stem can move up and down before the switch fails. Most mechanical switches are rated for 50 million to 100 million keypresses, depending on the type and manufacturer. A rubber dome keyboard is typically rated for 5 million to 20 million keypresses. This means a mechanical keyboard can last two to ten times longer than a rubber dome keyboard under normal use.

The reason is that mechanical switches use a metal spring and plastic or metal stem that are designed to move repeatedly without wearing out. Rubber domes use a rubber bubble that gradually loses its elasticity and becomes less responsive over time. After a few years of heavy use, a rubber dome keyboard often feels mushy or requires you to press harder to register keystrokes. A mechanical keyboard will feel the same after five years as it did when new, though individual switches can fail if they are damaged or if dust gets inside the housing.

Switches, stabilizers, and the rest of the keyboard

The switch itself is only one part of how a mechanical keyboard works. Larger keys like the spacebar, shift, and enter key use additional components called stabilizers that keep the key level as you press different parts of it. A stabilizer is a rail or wire that runs under the key and connects to the switch housing, preventing the key from tilting or wobbling. A poorly designed or installed stabilizer can make a keyboard feel uneven or sound hollow.

The switches are mounted on a circuit board called the PCB, which detects when each switch actuates and sends that information to your computer. The PCB is mounted inside a case, which is usually plastic or aluminum and provides the structure and sound characteristics of the keyboard. The keycaps — the plastic pieces you actually touch — sit on top of the switches. All of these parts work together, so a keyboard with excellent switches but poor stabilizers or a thin case will not feel as good as one where all the parts are well-designed.

Frequently Asked Questions

Can I replace the switches in my keyboard?

Only if your keyboard is designed for hot-swappable switches. Most mechanical keyboards sold for gaming or typing have hot-swappable switches, which means you can pull out a switch and insert a new one without soldering. Some keyboards require you to solder the switches to the circuit board, which means you need tools and skill to replace them. Check your keyboard's manual or manufacturer website to find out which type you have.

Why do mechanical keyboards cost more than regular keyboards?

Mechanical switches are more expensive to manufacture than rubber domes, and they last longer, so the total cost per year of use is often lower. A mechanical keyboard might cost $80 to $150, while a rubber dome keyboard costs $20 to $50. But the mechanical keyboard will still feel and work the same after five years, while the rubber dome keyboard will feel mushy after two or three years. If you type or game for several hours a day, the mechanical keyboard is usually the better value.

Do I have to bottom out a mechanical switch for it to register?

No. Most mechanical switches register partway through the press, so you can release the key as soon as you feel the bump or hear the click. Bottoming out — pressing all the way down — is not necessary and can cause fatigue if you do it repeatedly. However, some people bottom out out of habit, and some switches are designed to feel good when bottomed out. It is a personal preference.

What is the difference between Cherry MX switches and other brands?

Cherry MX switches are made by a German company and are the most common and widely copied mechanical switch design. Other brands like Gateron, Akko, and Outemu make switches that are similar in design but may feel slightly different or cost less. All of these brands make linear, tactile, and clicky switches. The differences between brands are usually small — a Gateron Red feels very similar to a Cherry MX Red — so trying a few different brands is the best way to find what you prefer.