HMX
Hmx Bad Sweetheart







The Bad Sweetheart, designed by Rena Lab, is one of the deepest-sounding HMX switches so far. Its T5 UPE-blend stem, spherical stem tip, and new P4 bottom housing molding give it an atypical HMX sound. The P4 bottom housing uses minimal fiberglass to eliminate a clacky tone, making this a good option for fans of deep, thocky, unmuted switches. It is factory lubed with mixed GPL105 and GPL205 on the leaf spring, stem feet, and bottom housing rails.
Last Updated: September 12, 2026
Specifications
Physical Specifications
- Actuation Force
- 45g
- Bottom Out Force
- 50g
- Pre-travel
- 2.0mm
- Total Travel
- 3.8mm
Build & Materials
- Stem Material
- T5
- Factory Lubed
- Yes
- Spring
- 22mm KOS single-stage extended
- Designer
- RENA LAB
- Mold
- New
Profile Information
- Profile
- Standard Profile
- Type
- Linear
- Silent
- No
- Pin Count
- 5
