Custom mechanical keyboards let you choose the case, mount, switches, and keycaps to get a typing feel and sound you like. The options can be overwhelming. This guide explains the main parts, what each one changes, and how to avoid common problems like rattling stabilizers and spring ping.

Mechanical keyboard on a desk

Case materials

  • Aluminum cases feel solid and heavy and are common in enthusiast boards. They can sound bright without internal dampening.
  • Plastic (ABS or polycarbonate) cases are lighter and often sound deeper or softer.
  • Wood cases are less common and give a warm look.

Weight helps the board stay put on the desk, but heavy boards are less portable.

Mounting styles

The mount describes how the plate and PCB sit inside the case:

  • Tray mount: the PCB screws into standoffs on the case floor. Simple and common, but feel can vary across the board.
  • Top mount: the plate attaches to the top case, giving a consistent feel.
  • Gasket mount: the plate is held by soft gaskets, which adds flex and softens the sound.

Gasket mounts are popular for a softer feel, but implementation varies. Read user impressions for the specific board.

Switches

Switches decide the core typing feel.

  • Linear: smooth press with no bump. Popular for gaming and fast typing.
  • Tactile: a bump you can feel at actuation.
  • Clicky: a bump plus an audible click.

Other factors include spring weight, travel distance, and stem material. Many boards are hot-swappable, so you can change switches without soldering. Buying a switch tester is a cheap way to compare.

Lubrication and spring ping

Lubricating switches can make them smoother and quieter, and it reduces "spring ping", a metallic ringing some springs make. Many switches now come factory-lubed. Hand-lubing takes time and care; too much lube can make switches feel sluggish.

Stabilizers

Long keys such as the spacebar, Shift, and Enter use stabilizers. Poorly tuned stabilizers rattle. To reduce rattle:

  • Choose screw-in stabilizers for stability.
  • Lubricate the wire ends lightly.
  • Make sure the wires sit properly in the housings.

Dampening

Foam between the PCB and case, or under the plate, can reduce hollow sounds. Some kits include foam; others leave it optional. Too much dampening can make the sound dull, so adjust to taste.

Keycaps

  • ABS keycaps are smooth and often have sharp legends but can develop shine with use.
  • PBT keycaps feel textured and resist shine.

Profiles (such as Cherry, OEM, SA) change the shape and height of keys. Check layout compatibility, especially for nonstandard bottom rows.

Layout and ergonomics

  • Full-size, TKL, 75%, 65%, 60%: smaller layouts save desk space but remove keys.
  • Consider a wrist rest for taller keyboards.
  • Some people prefer split or ergonomic layouts for comfort.

Firmware and connectivity

Look for programmable firmware (such as QMK or VIA) if you want to remap keys. Wireless boards add convenience; check battery life and connection type.

Quick checklist

  • Choose layout and size first.
  • Pick case material and mount based on feel and budget.
  • Test switch types with a switch tester.
  • Check whether the board is hot-swappable.
  • Look for screw-in stabilizers.
  • Decide on keycap material and profile.
  • Confirm firmware and connectivity options.

FAQ

Are custom keyboards worth it? If you type a lot and care about feel, they can be. Many prebuilt enthusiast boards now offer similar quality at lower cost.

How can I make my keyboard quieter? Use linear or silent switches, add dampening foam, and tune the stabilizers. A desk mat also helps.

Do I need to lube switches? Not always. Many modern switches are factory-lubed and sound good out of the box.