HMX EVA Linear Switches

The HMX EVA is a linear mechanical switch designed for users who prefer smooth keypresses with moderate resistance. It suits typists and gamers looking for a consistent, light-to-medium actuation force without tactile bumps or clicks. Its factory lubrication aims to reduce scratchiness, making it a good option for those valuing a quieter, smoother typing experience.

Feel & Sound

• Linear action provides a smooth, uninterrupted keystroke without tactile feedback or audible click.
• Factory lubrication helps minimize scratchiness, contributing to a quieter sound profile.
• Bottom-out force is slightly higher than actuation force, offering a noticeable but not harsh bottoming sensation.

Actuation Characteristics

• Light actuation force of 42g supports quick keypresses with moderate resistance, suitable for extended typing or gaming sessions.
• Short pre-travel distance (1.8mm) allows for responsive input, while total travel (3.6mm) provides enough depth to avoid accidental presses.
• Force variance of 5 cN indicates relatively consistent feel across keys.

Build Quality

• Housing made from durable nylon materials (top: Nylon P4, bottom: Nylon PA12) offers stability and reduces stem wobble, which affects key consistency.
• T2 nylon stem is designed for smooth movement and durability.
• Single-stage 22mm spring balances actuation force and return speed.
• Factory lubrication reduces initial scratchiness, shortening break-in time.

Compatibility

• PCB mount with 5 pins ensures secure installation on compatible PCBs but is less suited for hot-swap boards without plate support.
• Supports single LED lighting, compatible with most standard keyboard backlighting setups.

Trade-offs

• Linear feel may be less suitable for users who prefer tactile or clicky feedback.
• Unknown long-term durability and sound characteristics beyond factory lubrication.
• Not designed for plate mount, limiting compatibility with some keyboard builds.