Why Are Mechanical Switches Wobbly?

Mechanical keyboard switches can show varying degrees of wobble, a minor lateral movement noticeable when keys are pressed off-center. This wobbly mechanical switch, influenced by several factors, differs across switch designs.

1. Stem and Housing Tolerance

• Manufacturing Tolerances: Stem-to-housing manufacturing tolerances largely dictate wobble, with imprecise fits allowing lateral movement.
• Production Precision: The precision of stem and housing fits varies, influenced by manufacturing quality and material choices.

2. Keycap Fit

• Stem Fitting: The fit of the keycap on the switch stem also impacts wobble, with looser fits exacerbating it.
• Material and Quality: Lower-quality keycaps may worsen wobble due to less precise manufacturing.

3. Switch Type

• Design Variability: Different switch types and brands exhibit unique wobble levels, with some known for their stability.
• Component Materials: The choice of materials and design specifics, like stem shape, affects wobble intensity.

4. Keyboard Plate and PCB

• Mounting Impact: Switch mounting methods (plate vs. PCB mount) can influence stability, with plate-mounted switches typically showing less wobble.
• Plate Material: The switch plate’s material can also affect switch stability.

5. Usage and Wear

• Long-Term Effects: Over time, wear can slightly increase stem and housing wobble.

Addressing Switch Wobble

• Switch Films: Utilizing switch films between housings can tighten fits and reduce wobble.
• Quality Switches: Higher-quality switches generally feature tighter tolerances and less wobble.
• Keycap Selection: Opting for better-quality keycaps can diminish wobble perception.

Switch wobble in mechanical keyboards stems from manufacturing tolerances, keycap fit, switch design, mounting techniques, and wear. While a minimal wobble is typical and rarely impacts typing, significant wobble can be mitigated with high-quality switches, precise keycaps, and modifications like switch films, enhancing the typing experience for enthusiasts.