A strong fit if you want
- Smooth medium-weight linear builds
- Users who prefer deeper, rounded switch acoustics
- 5-pin MX-compatible hot-swap or solder PCBs
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02 / THE ESSENTIALS
JKDK × HMX Blossoms Linear Switch at a Glance
42 gf
Operating force
3.7 mm
Total travel
5-pin
Mount
Compatibility & build notes
5-pin MX-style footprint. Use with PCBs or hot-swap sockets that support five-pin switches; check boards designed around 3-pin mounting before purchase.
Factory lubricated. UniKeys specifies a thin 205g0 coating on stem legs and sliders, with dry-film lubrication on the spring and leaf.
Uses a 5-pin MX-style PCB mount. It can work with hot-swap keyboards whose PCB and sockets support 5-pin MX switches; some boards are designed around 3-pin mounting, so check the PCB layout before installation.
Construction
Operating force42 gf
Total travel3.7 mm
Mount5-pin
Compare with similar switches
Use verified force, travel, mount and lubrication fields to see how this switch differs from nearby alternatives.
Scroll to compare
JKDK × HMX Blossoms Linear SwitchCurrent
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OUTEMU Silent Peach V3 Linear SwitchView product |
|---|---|---|---|
| Type Linear | Type Linear | Type Linear | Type Linear |
| Operating force 42 gf | Operating force 37 gf | Operating force 45 gf | Operating force 40 |
| Bottom-out force — | Bottom-out force 42 gf | Bottom-out force 50 gf | Bottom-out force 50 |
| Pre-travel — | Pre-travel 2 mm | Pre-travel 2 mm | Pre-travel 2 |
| Total travel 3.7 mm | Total travel 3.6 mm | Total travel 3.5 mm | Total travel 3.3 |
| Mount 5-pin | Mount 5-pin | Mount 5-pin | Mount 5-pin |
| Factory lube Yes | Factory lube Yes | Factory lube Yes | Factory lube Yes |
Detailed specifications
Brand
HMX
Switch Type
Linear
Operating Force
42 gf
Total Travel
3.7 mm
Stem Material
UPE
Top Housing
PA12
Bottom Housing
P4 (PA66 + 25% fiberglass)
Spring
single-stage extended KOS
Factory Lubed
Yes
Mount
5-pin
Sound Profile
Deep, creamy, thocky; medium-pitch tendency
Typing Feel
Smooth medium-weight linear with firm bottom-out
Good to Know
Trade-offs and compatibility checks
- 3.7mm travel is shorter than the classic 4.0mm travel found on many MX-style switches
- Sound varies significantly with the keyboard case, plate, keycaps and mounting system
- Check PCB support before using a 5-pin switch in a board designed around 3-pin mounting
MEDIUM LINEAR
A collaboration linear with measured resistance
JKDK × HMX Blossoms uses 42±2gf actuation and 48±2gf bottom-out to sit between ultralight and heavy linear options.
Its medium weighting and 3.7±0.2 mm travel suit buyers who want a controlled press without moving to a long, full-travel feel.
- 42±2gf actuation keeps the press moderate rather than heavy
- 48±2gf bottom-out adds a firmer end to the stroke
- Sound descriptors are build-dependent, not fixed acoustic measurements
Bottom line: A medium-weight linear with its own collaboration-led direction.
WHY THE DETAILS MATTER
What the construction tells you
Blossoms combines an H3 stem, PA12 top housing, reinforced P4 bottom housing, and factory lubrication. For buyers, the useful takeaway is that it is built around controlled medium-weight travel rather than an ultralight or silent design.
Its deeper, rounded sound direction is a useful positioning cue rather than a guaranteed acoustic result; the surrounding keyboard build remains decisive.
- PA12 top housing is paired with reinforced P4 bottom housing
- H3 UPE stem uses a waffle-shaped tip
- 22mm KOS single-stage extended spring is factory lubricated
What it means: Weighting and 3.7mm travel are the clearer buying signals.
FIVE-PIN FIT
Plan around the locating legs
Blossoms uses a five-pin MX-style footprint. Confirm that the PCB and socket accept its two locating legs before choosing a 10- or 70-switch pack.
Pack choice should follow the actual key count of the build and any spares you want.
- Five-pin MX-style footprint.
- 10-switch pack is useful for testing or replacements.
- 70 switches provide a larger build quantity after fit and key count are confirmed.
Build note: Verify the footprint before selecting quantity.
THE RIGHT BUYER
When Blossoms is the better linear
Choose Blossoms for a medium-weight linear with a slightly shortened stroke and a cautiously deeper, rounded sound direction.
Choose a different linear if you prefer a lighter press, silent damping, or a longer-travel feel.
- Medium-weight force profile rather than ultra-light actuation
- 3.7mm travel is a meaningful difference from 4.0mm alternatives
- It is not a silent switch and does not include acoustic damping
Decision note: Medium weight and 3.7 mm travel are the decision points.
Questions about JKDK × HMX Blossoms Linear Switch
What type of switch is HMX Blossoms?
HMX Blossoms is a linear MX-style mechanical keyboard switch designed by JKDK and manufactured by HMX. It uses a 5-pin PCB mount and is factory lubricated. The switch has no tactile bump or click mechanism, so the keypress is intended to remain smooth through the stroke.
What is the actuation force of HMX Blossoms?
The published operating force is 42±2gf, with a bottom-out force of 48±2gf. That places Blossoms in a medium-weight range: lighter than many heavy linears but not as light as switches aimed at extremely low-effort gaming use.
How much travel does the Blossoms switch have?
Blossoms is specified with 2.0mm pre-travel and 3.7±0.2mm total travel. The total stroke is therefore slightly shorter than the 4.0mm travel commonly associated with traditional MX-style switches, which can make the end of the press arrive a little sooner.
Is HMX Blossoms factory lubed?
Yes. UniKeys states that the stem legs and stem sliders receive a thin coat of 205g0, while the spring and leaf use dry-film lubrication. The remaining areas are kept dry, including the bottom housing around the stem pole.
Will HMX Blossoms fit a hot-swap keyboard?
It can work with hot-swap keyboards that use MX-style sockets and provide clearance for a 5-pin switch. Because some boards are designed around 3-pin mounting, check the PCB layout before ordering instead of assuming every hot-swap keyboard accepts the extra locating pins.
What does HMX Blossoms sound like?
UniKeys and Milktooth describe Blossoms as deep, creamy, rounded and thocky. These are subjective sound descriptors, not fixed measurements. The final result can change substantially with the keyboard case, plate, mounting system, foam, keycaps and typing surface.
What materials are used in HMX Blossoms?
The switch uses an H3 UPE stem with a waffle-shaped tip, a PA12 top housing and an HMX P4 bottom housing made from PA66 blended with 25% fiberglass. It also uses a 22mm KOS single-stage extended spring.
How many HMX Blossoms switches should I buy?
KeebPilot offers 10-switch and 70-switch packs. Ten switches are useful for testing, spares or small projects. Seventy switches can cover many compact and 65% keyboards, but layouts vary, so count the required switch positions and allow for a few spares before ordering.