Mechanical Keyboard Switch Types Explained: Linear vs Tactile vs Clicky
Every mechanical switch looks similar from the outside, but the internal stem shape and contact mechanism decide whether a keypress feels smooth, bumpy, or clicky. Understanding those internals — not marketing labels — is what lets you predict how a switch will actually feel before you press it.
What's Physically Inside a Switch
A mechanical switch is built from a top housing, a bottom housing, a stem, a coil spring, and a pair of metal leaves or contact points that close an electrical circuit. Pressing the keycap pushes the stem down against the spring; when the stem travels far enough for the internal contacts to meet, the switch registers as "actuated" and the keyboard's controller reports the keypress to the PC. Total physical travel on most full-size switches is about 4mm, and actuation typically occurs around the 2mm mark, well before the key bottoms out.
The shape of the stem is what separates the three switch families. A straight, uninterrupted stem produces a linear switch. A stem with a small step or ridge partway down produces a tactile bump as it passes the contact leaf. Adding a secondary plastic piece (a click jacket) or a metal click bar that snaps against the housing produces the audible click on top of that tactile bump. The spring weight, measured in grams-force (gf), determines how much pressure is needed to compress it, and manufacturers publish this as the "actuation force" spec.
Linear Switches: Consistent Force, No Feedback
Linear switches use a smooth, unbroken stem, so the resistance you feel increases steadily and predictably from the moment you press until the key bottoms out, with no bump or click anywhere in the stroke. Actuation force on common linear switches ranges from roughly 35gf on very light variants up to 60gf on heavier ones, with 45g being a widely used middle ground. Because there's no physical or audible signal at the actuation point, the only way to know a keypress registered is by bottoming out or watching the on-screen result.
This lack of interruption is why linear switches are frequently chosen for fast, repeated key taps: there's less mechanical resistance changing mid-stroke to slow down finger movement, and the consistent force curve makes rapid double-taps more predictable. The tradeoff is that typing on a linear switch relies more on muscle memory and full keypresses, since there's no mid-travel feedback confirming a lighter, partial press was enough.
Tactile Switches: The Bump, Explained Mechanically
A tactile switch adds a small ridge or step to the stem that the contact leaf has to push past. As the leaf rides up and over this step, the resistance briefly spikes — often 10-15gf above the switch's baseline force — before dropping back down once the bump is cleared, and that spike-then-drop is what your finger perceives as a "bump." On most tactile designs, actuation is engineered to happen right at or just after that bump, so the physical feedback and the electrical registration roughly coincide.
Actuation force on tactile switches typically runs 45-55gf at rest, with the bump itself briefly requiring more force to push through. Because the bump gives a physical confirmation that the key has actuated, tactile switches let a typist release pressure as soon as they feel it rather than needing to bottom out, which can reduce finger fatigue during long typing sessions.
Clicky Switches: Adding an Audible Signal
Clicky switches start from a tactile design and add a second component purely for sound. One common mechanism is a click jacket: a small plastic sleeve around the stem that gets caught and released by a leg inside the housing, producing a click on both the down-stroke and the up-stroke. A second mechanism uses a separate click bar that gets flicked against the housing wall as the stem passes a certain point, producing a sharper, single click on the down-stroke only.
Because clicky switches still rely on a stepped stem to create tactility, they share similar actuation-force ranges to tactile switches, generally 50-60gf. The audible click is a byproduct of the mechanism, not a separate force curve, so a clicky switch doesn't inherently require more finger force than a tactile one — it simply adds a sound cue at the same point the tactile bump occurs.
