Haimu SW-X MP 45g

Quick Summary

The Haimu SW-X MP is a light, factory-lubed linear built around a full POM housing and a UPE stem capped with a metal tip. With a ~45g actuation, a 62g bottom-out, and a shorter-than-standard 3.2mm travel, it aims at typists and gamers who want an easy, fast keypress with a deep, rounded sound signature out of the box. It’s a strong value pick for anyone who wants a refined linear without breaking out the lube station.

Specs and Feel

This is a clean linear with no hint of tactility: pressure ramps smoothly from top to a firm 62g floor. The lighter 45g actuation keeps it nimble, and the 3.2mm total travel is a touch shorter than the MX-standard 4.0mm, so bottom-out arrives a hair sooner and the switch feels a little snappier than a typical full-travel linear. The all-POM top and bottom housing pair with a UPE stem to deliver a soft, fuller acoustic profile and respectable stock smoothness; the metal stem tip adds a stable, consistent bottom-out rather than a hollow thud. Stem wobble is well controlled for the price, and scratch is minimal thanks to the factory lube. You’ll notice texture only if you’re hunting for it.

Tuning

There’s little forced on you here: the factory lube already takes the edge off, so most users can drop these in stock and be happy. If you want to push it, a light spring lube tightens up any faint ping, and a single-switch films pass can firm up wobble, but neither is essential. Leave the housing lube alone unless you’re confident, since POM is already self-lubricating.

Verdict

Buy it if you want a light, deep-sounding linear that performs well straight from the bag and doesn’t demand a tuning afternoon. The shorter travel, POM acoustics, and frosted light window make it a distinctive, budget-friendly option for RGB builds and long typing days. Skip it only if you specifically want full 4.0mm travel or a brighter, clackier top-out. This switch is tuned for a smooth, mellow sound rather than a crisp, loud one.