H
SILENT · 55g
silent muted Haimu

Haimu Heartbeat 55g

The Haimu Heartbeat 55g is a silent linear switch with a 55g actuation, POM stem and nylon housings — smooth, muted and well-judged for quiet builds.

55g
Actuation
force
3.8mm
Travel
total key travel
4.0/5
Smoothness
our feel rating
4.0/5
Wobble
lower is better
2/5
Noise level
muted

How it feels

Smoothness silky → scratchy 8.0
Wobble stability rock-solid → loose 2.0

How it sounds

muted
Profile muted
Noise level 2/5
Spring ping None

Frequently asked

Is the Haimu Heartbeat 55g fully silent?

It's a true silent linear, so the bottom-out and upstroke are dampened rather than padded into total silence. You'll still get a soft, muted thock, but it's dramatically quieter than a standard linear and well suited to shared rooms or late-night typing.

Does the Heartbeat 55g need lubing out of the box?

No. The POM-on-nylon combination runs smooth stock and the silencing dampeners make hand-lubing fiddly. Most builders leave these alone; a light factory tune is plenty.

How heavy does the Heartbeat 55g feel?

The 55g actuation lands in the medium range — heavier than a 45g daily driver but far from fatiguing. It's a comfortable middle weight that resists accidental presses without slowing down fast typists.

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