haimu Heartbeat Silent Linear Switches

This silent linear switch suits users who want a quiet typing experience without the typical softness of rubber-damped switches. It fits well for office workers or typists seeking smooth keypresses with clear feedback and reduced noise. Gamers preferring linear action with moderate force may also find it suitable.

Feel & Sound

The switch offers a smooth, consistent keystroke with no tactile bump. Its silence comes from flexible stem legs that dampen sound organically, avoiding the mushy feel common in rubber-damped silent switches. This results in a clean, muted sound profile without sacrificing key definition. Bottoming out feels firm but not harsh.

Actuation Characteristics

With a bottom-out force around 65 grams and total travel near 3.8 mm, it requires moderate effort to press fully. The force curve is linear, providing steady resistance from top to bottom. This makes it less fatiguing for extended typing but may feel heavier compared to lighter linear switches.

Build Quality

The switch uses Nylon PA66 housings top and bottom, contributing to durability and a stable housing structure. The POM stem is a classic choice for smoothness and wear resistance. Factory lubrication is applied to reduce friction and noise, improving out-of-the-box performance.

Trade-offs

While pre-lubed for smoothness, additional lubrication may still benefit enthusiasts seeking an even quieter or smoother feel. The switch is not designed for users who prefer tactile or clicky feedback. Unknown factors include long-term spring fatigue and stem wobble levels.