MMD Princess Linear Mechanical Keyboard Switch with 20.4mm Extended Spring and Customisable Actuation Force

The MMD Princess switch is a linear mechanical keyboard component designed for builders and modders seeking to tailor their keyboard's typing experience. Unlike pre-built keyboards with fixed switches, this product offers a choice. It provides a spectrum of actuation forces, from a light 28 grams-force (gf) to a more substantial 60gf, allowing you to match the switch's resistance to your typing style, whether for rapid gaming or extended coding sessions. The defining feature is its 20.4mm extended, double-stage spring, which contributes to a specific force curve during the keypress. Supplied as a single switch body, it is a core part for constructing a custom keyboard or modifying an existing one, putting the control over feel and sound directly in your hands.

Features and Construction

The MMD Princess switch is defined by its technical specifications and the options available to the user. It is not a complete switch assembly with keycap, but the essential internal component that dictates how a keypress will feel. The following details break down its build and how its measurements translate into a typing experience.

Material and Build

The switch consists of a plastic housing, stem, and a metal spring. The exact type of plastic used for the housing and stem is not specified, which is common for aftermarket switch components where the focus is on the mechanical performance. The spring is a critical element, made of metal with a wire diameter of 0.23mm. Its extended length of 20.4mm classifies it as a double-stage or long spring, which is designed to offer a more progressive resistance compared to standard-length springs, potentially providing a smoother bottom-out feel. The switch is offered in two main variants: 'Factory Run' and 'Artificial Run.' These terms typically refer to the level and method of factory-applied lubrication, which affects the smoothness and sound of the switch's travel.

Size and Practical Fit

The key physical measurements governing the switch's operation are its travel distance and spring specifications. The total travel—the distance the keycap moves from rest to fully pressed—is 3.6mm. The actuation point, where the keypress is registered by the computer, occurs at 2.0mm of this travel. This is a standard actuation point for many linear switches. The spring itself is 20.4mm long when fully extended. This switch is compatible with standard MX-style keyboard PCBs and plates. As it is supplied as a single switch body, you will need one per key position on your keyboard layout.

Uses and Placement

This product serves a specific niche within the mechanical keyboard hobby. It is not a plug-and-play peripheral but a component for a larger project. Its use cases are centred around customisation and personalisation, appealing to users who want more than an off-the-shelf typing experience.

Event or Professional Use

For professional streamers, esports athletes, or programmers who spend extensive hours at the keyboard, the ability to fine-tune actuation force can be valuable. A lighter switch (like the 28gf or 38gf options) may reduce finger fatigue during marathon typing or gaming sessions, while a heavier option (53gf or 60gf) can provide more deliberate feedback and reduce accidental key presses. The consistent linear motion can also be beneficial for rapid, repetitive key presses often required in gaming or data entry scenarios.

Everyday Home Use

For the home enthusiast or hobbyist, this switch is a building block for a personalised typing instrument. Building a keyboard with a uniform set of these switches allows for a consistent feel across all keys. The choice between 'Artificial Run' and 'Factory Run' lets users decide on their preferred level of factory lubrication, which is a key modding consideration. Using these switches is a practical step towards creating a keyboard that sounds and feels precisely to your liking, transforming a daily tool into a customised piece of equipment.

Benefits and Buying Value

The value of the MMD Princess switch lies in its specificity and the control it offers. In a market with many pre-lubricated or fixed-specification switches, this product provides raw components and clear choices, placing the outcome in the builder's hands.

Reuse and Low Maintenance

As a fundamental mechanical component, a keyboard switch is designed for long-term use. Should you wish to change the feel of your keyboard in the future, these switches can be desoldered (if soldered) or removed from hot-swap sockets and replaced. The spring itself can also be swapped with other aftermarket springs if you wish to experiment further, making the switch body a reusable platform for experimentation. Maintenance primarily involves keeping dust and debris out of the housing, which is standard for any mechanical switch.

Why Choose This Product

Choose the MMD Princess switch if you require a specific linear feel and value having exact specifications. The provided data—actuation force, travel distance, and spring length—gives you concrete parameters to work with, unlike more vague marketing descriptions. The range of six force options (28g, 38g, 45g, 48g, 53g, 60g) across two lubrication types means you can select the exact starting point for your build. It is a product for those who appreciate measurable details and want to make an informed choice based on engineering data rather than subjective claims.