HMX
Hmx X 80 Retros Kd400







The HMX KD400 is the successor to the KD200, made by HMX with its newest molds and materials. It is the first HMX switch to use the M1 strengthened POM stem and N3 bottom housing, which together give a unique clacky sound in the vein of the classic HMX clack but with more to it. The L3 mold leaves a slightly larger stem-to-top-housing gap for very smooth travel. Factory lubed: stem legs and sliders get a thin coat of 205g0, and the spring and leaf are lubed with dry film。
Last Updated: September 10, 2026
Specifications
Physical Specifications
- Actuation Force
- 40g
- Bottom Out Force
- 46g
- Pre-travel
- 1.2mm
- Total Travel
- 3.5±0.2mm
Build & Materials
- Stem Material
- Strengthened POM (M1)
- Factory Lubed
- Yes
- Spring
- KOS single-stage extended
- Designer
- 80 Retros
- Mold
- New (L3)
Profile Information
- Profile
- Standard Profile
- Type
- Linear
- Silent
- No
- Pin Count
- 5
