A mechanical keyboard uses an individual mechanical switch mechanism at each key position. The switch registers the press; the keycap is the removable surface you touch. The plate, PCB, case, stabilisers, firmware and desk complete the system. Mechanical keyboards can be loud, quiet, linear, tactile or clicky—“mechanical” describes the mechanism, not one mandatory personality.
That is the useful beginner definition. You do not need to become a switch engineer before choosing a keyboard or replacing keycaps, but knowing which component does what prevents expensive confusion. A new keycap cannot repair a dead switch. A silent switch does not make every case silent. And “75% keyboard” describes a broad arrangement, not 75% of a full keyboard delivered in the box.
Article method and source note
Author: Thekapco Editorial Team
Technical reviewer: Timo, Senior Executive at Thekapco
Publication date: 12 January 2023
Last reviewed: 21 September 2026
Switch anatomy and actuation were checked against CHERRY's published MX technical explanation. Keyboard matrix and layer behaviour were checked against QMK documentation. Thekapco's observations about keycaps, fit, sound and upgrades come from its controlled expert source and completed technical guides. Exact construction varies between keyboard models.
In this guide
- What makes a keyboard mechanical
- Mechanical, membrane and scissor keyboards
- The layers of a mechanical keyboard
- Switches versus keycaps
- Linear, tactile and clicky switches
- Keyboard sizes and layouts
- What changes feel and sound
- What a beginner should upgrade first
- A safe first-upgrade sequence
- Common misconceptions
- Frequently asked questions
What makes a keyboard mechanical
At each key position, a mechanical keyboard uses a switch containing moving mechanical parts. In a conventional contact switch such as CHERRY MX, pressing the keycap moves the switch stem and compresses a spring. At the actuation point, the switch closes an electrical circuit; releasing the key lets the spring return the stem.
The keyboard controller scans the switch matrix, interprets the position through its firmware or keymap, and sends the input to the computer. The key may register before it reaches the bottom of its travel.
Mechanical does not mean clicky
Many mechanical switches are linear and produce no deliberate click from the switch mechanism. Tactile switches add a noticeable bump. Clicky switches add intentional audible feedback. Case, keycap, stabiliser and typing noise still exist around all three.
Mechanical does not describe every modern switch technology
Optical, Hall-effect magnetic, electrocapacitive and hybrid keyboards may offer replaceable caps or familiar layouts while detecting presses differently. Read the exact product specification instead of forcing every keyboard into a two-box argument.
Mechanical, membrane and scissor keyboards
“Normal keyboard” is not a technical category. Membrane and scissor keyboards are normal for many offices, laptops and homes; mechanical keyboards are normal in many gaming, professional and enthusiast setups.
| Keyboard type | Broad mechanism | Common strengths | Common limits |
|---|---|---|---|
| Mechanical contact switch | Individual moving switch mechanism closes contacts at each position | Wide switch variety, serviceable designs on some models, many aftermarket keycaps | Cost, height, sound and repairability vary widely |
| Rubber-dome membrane | Dome pressure brings conductive layers or contacts together | Affordable, simple, often quiet and widely available | Key feel and replaceable-cap options are often limited |
| Scissor | Scissor linkage stabilises a low-travel key over a membrane/dome system | Thin, stable keys suited to laptops and compact boards | Caps and mechanisms can be model-specific and delicate |
| Optical or magnetic | Light or magnetic sensing detects switch position | Can support fast or adjustable behaviours depending on design | Switch/cap compatibility and firmware are ecosystem-specific |
No type wins every use case
A membrane keyboard may be the right tool when budget, low profile, portability or simple replacement matters most. A mechanical board may be attractive when switch choice, replaceable components or customisation matters. Product quality varies inside every category.
Repairability is model-specific
Some mechanical boards are hot-swappable; others require soldering. Some use standardised caps; others use proprietary or low-profile parts. Do not assume that “mechanical” means every component can be changed safely at home.
The layers of a mechanical keyboard
Thinking in layers makes troubleshooting much easier.
Keycaps
The removable surfaces carrying legends or artwork. They shape the finger contact, visual design and part of the sound. They do not register the electrical input.
Switches
The mechanisms under the caps. They determine actuation characteristics and much of the press feel. Their stems also provide the keycap mount.
Stabilisers
Supports used on wide keys such as Spacebar, Enter, Shift and Backspace. They help both ends travel together. Rattle, ticking or binding on a wide key may involve the stabiliser rather than the cap or switch alone.
Plate
A structural layer that locates or supports switches in many keyboards. Plate material and design can influence stiffness and sound, but the result depends on the complete build.
PCB and switch matrix
The printed circuit board carries the electrical system, sockets or solder points, controller and connections. Switches are commonly arranged in a row-and-column matrix so the controller can scan key positions efficiently.
Mounting system and case
The PCB/plate assembly attaches to the case through a mounting design. Case material, internal space, mounting points, dampening and feet all contribute to the result.
Firmware and keymap
Firmware tells the controller what to send when a physical position is pressed. Smaller keyboards often use layers so one key position can produce different commands. A missing dedicated key may still exist on a function layer.
Switches versus keycaps
This is the distinction every beginner should keep.
| Question | Mainly a switch issue | Mainly a keycap issue | Other parts involved |
|---|---|---|---|
| When does the press register? | Yes | No | Firmware/settings on some boards |
| Is there a tactile bump or deliberate click? | Yes | No | Case changes the heard result |
| What surface does the finger touch? | No | Yes | — |
| Are the letters readable or shine-through? | No | Yes | LED and switch orientation |
| Does a key produce electrical input? | Yes | Usually no | PCB, socket and firmware |
| Does the Spacebar rattle? | Partly | Partly | Stabiliser, case and installation |
| Does the board look different? | Sometimes | Usually the largest visible change | Case and lighting |
A new keycap cannot change actuation
Changing caps will not turn a linear switch into a tactile switch or repair a contact that does not register. It can change surface shape, height, mass, fit and acoustics.
A new switch does not guarantee keycap compatibility
The switch stem must match the cap, but the full set must also cover the physical layout, key sizes and stabilisers. “MX-style” is a starting check, not a complete fit certificate.
Linear, tactile and clicky switches
Switch categories describe the feedback built into the switch mechanism.
Linear
A linear switch travels without an intentional tactile bump from the mechanism. Spring weight, travel and lubrication still create different experiences between models.
Tactile
A tactile switch provides a noticeable change in resistance during the press. The strength, position and shape of the bump vary.
Clicky
A clicky switch adds an intentional sound mechanism, often with tactile feedback. It may be enjoyable in a private room and socially ambitious in a quiet shared office.
Silent and dampened options
Some switches use internal dampening to reduce top-out and bottom-out noise. They are quieter, not literally silent. Stabilised keys, case resonance and typing force still contribute.
Try switches in the environment where you will use them. A twelve-second sound video through phone speakers cannot reproduce your desk, room or colleague's opinion from two seats away.
Keyboard sizes and layouts
Size describes which key groups are present; physical layout describes their arrangement and shape; logical layout describes what they type.
Common size families
- Full-size: main block, function row, navigation cluster and number pad.
- TKL: usually full-size without the number pad.
- 75%: keeps a function row and arrows in a compressed arrangement.
- 65%: usually keeps arrows but removes the function row and more navigation keys.
- 60%: focuses on the main typing block; other functions often live on layers.
These are conventions, not engineering standards. Two 75% boards can use different key sizes.
ANSI, ISO and JIS
These physical layout families affect Enter, Shift, language-area and bottom-row keys. Thekapco's current keycap standard focuses on ANSI, with no current ISO support as of 14 September 2026.
Read the Keyboard Sizes and Layouts Guide before choosing a board solely from a percentage label.
What changes feel and sound
The complete keyboard creates the experience. Changing one part changes its contribution, not the laws of the rest of the build.
Switch and spring
The switch provides actuation behaviour, travel and the main linear/tactile/clicky character. Spring force affects how much effort the press and return require.
Stabiliser tuning
Stabilisers strongly affect large keys. Rattle, ticking, uneven travel and lubrication state can dominate the Spacebar experience.
Case, plate and mount
These structures shape stiffness, resonance and how vibration moves through the board. In Thekapco's experience, overall keyboard construction has the strongest influence on whether a build produces the polished sound commonly heard in ASMR videos.
Keycaps
Material, thickness, cavity and profile can provide an audible finishing influence. Keycaps also create the largest visible change. Their contribution is real, but it should not be isolated from the keyboard.
Desk and room
Deskmat, desk surface, microphone, room and typing force change recorded and perceived sound. A comparison is meaningful only when the method keeps the other variables reasonably controlled.
For the detailed explanation, see Why Keycaps Change Keyboard Sound.
What a beginner should upgrade first
Upgrade the part connected to the problem you actually want to solve.
| Goal | Sensible first check | Why |
|---|---|---|
| Change the visual design | Keycaps | Largest visible change and reversible when fit is verified |
| Change tactile/linear/clicky feel | Switches, if the board supports safe replacement | The switch creates that mechanism |
| Reduce wide-key rattle | Stabiliser diagnosis | A keycap swap may not address the cause |
| Add missing keys | Keyboard size/keymap/layer choice | Keycaps cannot add switch positions |
| Improve low-light legend visibility | Shine-through keycaps and lighting path | Decorative RGB does not guarantee lit characters |
| Fix a key that does not register | Switch/socket/PCB/firmware diagnosis | The cap is usually not electrical |
| Learn what you prefer | Use the current board and change one variable | Multiple simultaneous changes hide the cause |
Keycaps are a practical first visual upgrade
When the board uses a supported mount and the set covers every required size, changing keycaps is reversible and approachable. Turn off the keyboard, use a proper puller and work carefully around stabilised keys.
Switches require a board-specific check
Confirm whether the keyboard is hot-swappable and which switch types the sockets support. Do not pull soldered switches, cut switch parts or force an incompatible switch because a short video made the operation look therapeutic.
A safe first-upgrade sequence
- Record the exact keyboard model and current problem or goal.
- Take a clear top-down photograph.
- Identify the physical layout and key sizes.
- Check the switch mount and whether the board is hot-swappable.
- Choose one variable to change.
- Read the keyboard and component maker's instructions.
- Keep original parts organised so the change is reversible.
- Test every key after installation.
- Stop if a switch, socket, stabiliser or cap requires unusual force.
For a keycap change, follow How to Change Keycaps Safely.
Common misconceptions
“Mechanical keyboards are always loud”
False. Switch type, dampening, stabilisers, keycaps, case, mounting and typing style all affect noise. Clicky switches intentionally add sound; silent mechanical switches aim to reduce it.
“Mechanical keyboards are always faster”
False as a universal statement. Actuation characteristics can support specific gaming or typing preferences, but skill, settings, firmware, latency and task matter. Many people perform perfectly well on membrane or scissor keyboards.
“Any mechanical keycap will fit”
False. Mount, layout, sizes, stabilisers and kit coverage must align.
“The keycap controls the switch colour”
False. A red switch does not require a red cap, and changing the cap does not change the switch's actuation category.
“Smaller keyboards have fewer functions”
They have fewer dedicated physical keys, but firmware layers can preserve many functions. Whether that workflow feels efficient is personal.
“Customisation means rebuilding everything”
It does not. A compatible keycap set, deskmat or software remap can be enough. The best first upgrade may also be no upgrade until you understand what you want changed.
Frequently asked questions
Is a mechanical keyboard better than a membrane keyboard?
Not universally. Mechanical keyboards offer wide switch and customisation options; membrane boards can be affordable, quiet, simple and low-profile. Compare the exact products and your use.
Can mechanical keyboards be quiet enough for an office?
Yes, some can. Consider silent or dampened switches, stabilisers, case construction, desk surface and typing force. Office tolerance is part of the specification, even if it is not printed on the box.
Can I change only the keycaps?
Yes, when the mount, physical layout, key sizes, stabilisers and kit coverage match. Keycap replacement does not require changing switches on a compatible board.
How do I know whether my keyboard is hot-swappable?
Check the exact model specification and manual. Do not infer it because the keycaps come off; removable keycaps are common on boards with soldered switches.
Do keycaps change typing feel?
They can change surface texture, height, top shape, mass and row contour. The switch continues to provide actuation and its main feedback category.
Where should a complete beginner go next?
Start with the Complete Guide to Keycaps, then use the fit guide before buying. Learn only the terms required for the next decision. The keyboard hobby will happily provide the remaining vocabulary later, usually when you thought you were going to bed.