HMX Xinhai 37G — HiFi Linear Switch with PA12 Housing | Factory Lubed · 50M Cycles
$0.36
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HMX Flagship Custom Linear Switch
HMX Xinhai Linear Switch
The ultimate symphony of 37gf feather-light touch and crisp, premium acoustics. Tired of muted, scratchy generic linears or heavy springs that fatigue your fingers? HMX, the pinnacle of custom switch manufacturing, brings you the "Xinhai" (Starry Sea) Linear Switch. Engineered for effortless typing and pristine sound, it features a rare PA12 top housing and a POM stem. This acoustic combo delivers a uniquely soft yet high-pitched, clean "Clack". With a 37gf actuation, an aggressive 22mm extended spring, and a punchy 3.4mm early bottom-out, every keystroke feels as light, snappy, and dazzling as a starry sea.
🛡️ 30-Day Risk-Free Trial
🚚 Lightning Shipping
✅ 5-Pin Hot-Swap Compatible
PA12
Top Housing
37gf
Feather Light
22mm
Extended Spring
3.4mm
Early Bottom-Out
Why HMX Xinhai Ends the "Heavy & Muted" Curse?
Muted & Scratchy Acoustics
Many linears sound either too muffled or annoyingly loud. Poor material combinations create scattered, hollow echoes, completely robbing you of that premium, satisfying custom keyboard sound.
Finger Fatigue & Strain
Switches that are too light often feel sticky and slow to return. Conversely, heavy springs (50gf+) cause severe finger joint fatigue and stiffness after hours of coding or gaming.
Sluggish & Mushy Bottom-Out
Standard 4.0mm travel feels unnecessarily long and sluggish during high-speed typing. Furthermore, generic factory lubing often leaves a gritty, friction-heavy feeling behind.
✨ The Endgame Solution: Custom PA12 + POM acoustics, a 37g feather-light touch, and HMX's god-tier factory lube.
Say Goodbye to Muted Thuds
PA12 + POM Crisp Resonance
Feature
Utilizes a rare and meticulously tuned acoustic blend: a PA12 Nylon top housing that softens harsh noises, paired with a POM stem designed to trigger high-frequency resonance.
Advantage
This exact material collision completely purifies the sound profile, eliminating muddy low-end echoes common in full-POM or full-Nylon switches.
Benefit
Every keystroke becomes a refined ASMR experience. The switch delivers an unmistakable, clean, and highly recognizable "Crisp Clack". It's not obnoxiously loud, but incredibly elegant and premium.
Evidence
Highly praised by custom keyboard enthusiasts and sound-test reviewers for producing a "glass-marble-like" pristine acoustic signature.
Say Goodbye to Finger Fatigue
37gf Feather-light & 22mm Spring
Feature
Perfectly dialed into a 37gf actuation force (45gf bottom-out), powered by a highly resilient 22mm single-stage extended spring.
Advantage
The extended spring provides substantial initial resistance to prevent accidental resting misclicks, while the ultra-low 37g force ensures the actual press requires zero effort.
Benefit
It's like walking on clouds. Release the tension in your fingers—you can type or game for 12 hours straight with absolutely zero fatigue. The 22mm spring forces an incredibly snappy, aggressive rebound that keeps your typing rhythm fast and fluid.
Evidence
Favored by professional programmers and hardcore gamers as the ultimate ergonomic solution for high-APM (Actions Per Minute) tasks.
Say Goodbye to Sluggishness
3.4mm Early Bottom-Out & HMX Lube
Feature
Compresses the total travel distance to a punchy 3.4mm (with a 2.0mm actuation). Combined with HMX's legendary, fully automated high-precision factory lubrication.
Advantage
The shortened travel distance means you hit the solid bottom faster. The god-tier factory lube entirely removes spring ping and plastic scratching.
Benefit
Skip the tedious hours of hand-lubing. Out of the box, the Xinhai switch is flawlessly smooth, like cutting through warm butter. The 3.4mm early bottom-out provides a highly satisfying, solid confirmation with every press, dramatically boosting your typing speed.
Evidence
HMX is widely regarded as the "ceiling" of factory-lubed switches in the custom mechanical keyboard community, guaranteeing an out-of-the-box endgame experience.
The Acoustic Evolution
| Spec Comparison | Generic Linear Switch (e.g. Standard Red) | ✨ HMX Xinhai Linear Switch |
|---|---|---|
| Housing Material | Standard PC/Nylon blend (Scattered sound) | Tuned PA12 Top + Nylon Base — Refined acoustics |
| Sound Profile | Prone to spring ping or hollow echoes | Crisp, High-pitched, Premium Clack |
| Actuation Force | 45 – 55gf (Heavy, causes fatigue) | 37 gf — Feather-light, zero fatigue |
| Spring Config | 15mm standard short spring | 22mm Extended Spring — Snappy, bouncy return |
| Total Travel | 4.0 mm (Long and sluggish) | 3.4 mm — Early bottom-out, punchy feedback |
| Lubrication | Often dry, requires tedious hand-lubing | HMX God-tier Factory Lube — Buttery smooth out-of-box |
Technical Specifications
Product NameHMX Xinhai Linear Switch
Switch TypeHIFI Linear Mechanical Switch
ManufacturerHMX
Top HousingPA12 Nylon (Softens overall acoustic profile)
Bottom HousingNylon
Stem MaterialStandard POM (Triggers crisp, high-frequency clack)
Operating Force37 gf (Ultra-light)
Bottom-out Force45 gf
Pre-travel2.0 mm
Total Travel3.40 mm (Early bottom-out)
Spring Specs22 mm Single-Stage Extended Spring
Pin Configuration5-Pin (Clip 2 plastic pins to fit 3-Pin PCBs)
LubricationHMX Precision Factory Lubed
Sound SignatureCrisp, higher-pitched premium resonance (Clack)
Customer Reviews
★★★★★
"This crisp sound is incredibly therapeutic!"
"HMX's sound tuning on the Xinhai is unbelievable. It's not muffled like standard full-POM switches. The PA12 top housing gives the bottom-out a very refined, clean, high-pitched clack. It literally sounds like glass marbles colliding when I type. Absolutely beautiful."
— @AcousticKeeb, Sound Enthusiast
★★★★★
"37g + 22mm spring is the ultimate combo for work."
"I write tens of thousands of lines of code daily. The 37g actuation is a lifesaver; my fingers no longer ache. The best part is the 22mm extended spring—it makes the rebound so fast and snappy, it doesn't feel weak or mushy at all. Highly recommended for typists!"
— @CodeSurfer, Senior Developer
★★★★★
"You can always trust HMX factory lube."
"Just plugged them straight into my hot-swap board. The smoothness is maxed out, absolutely zero scratchiness or spring ping. The 3.4mm early bottom-out makes the typing feel incredibly solid. Definitely one of the most surprising light-linears of the year."
— @LinearAddict, Custom Keeb Veteran
Common Questions
PA12 is a high-end polymer nylon material. In the Xinhai switch, it acts as an excellent "acoustic filter," softening harsh, muddy background noises. When the smooth POM stem bottoms out and rebounds, the PA12 housing shapes the sound into an incredibly crisp, high-pitched, and clean "Clack," completely avoiding the hollow echoes of cheap plastics.
This is a common but unnecessary worry. While 37gf is very light, the Xinhai switch maintains a classic 2.0mm pre-travel and features a 22mm extended spring. The long spring provides excellent initial resistance, preventing misclicks when your fingers simply rest on the keys. It massively relieves typing fatigue, making it perfect for all-day use.
3.4mm is known as an "early bottom-out" design. By shortening the total travel, your keystrokes hit the bottom faster, providing a highly solid and "punchy" feedback. It eliminates the sluggish, draggy feeling of the latter half of a traditional 4.0mm stroke, effectively boosting your high-speed typing rhythm.
Absolutely not! HMX is widely recognized as the "ceiling" for factory lubrication in the custom keeb community. The Xinhai switches undergo incredibly precise automated lubing on the rails, leaves, and springs. They arrive in peak, buttery-smooth condition with zero noise—just plug and play.
Yes, you can! The two extra plastic pins on the bottom of a 5-pin switch are just for extra stability on plateless builds. If your PCB only has 3 holes per switch, simply use a nail clipper or flush cutters to snip off the two small side plastic pins. They will fit perfectly and it will not affect the switch's performance or lifespan whatsoever.
Premium Quality, Worry-Free Support
Fast Logistics
Dispatched in 24h via global lightning logistics. Real-time tracking.Compatibility Pro
Fits 5-Pin & 3-Pin MX PCBs. Free returns on incompatibility.Certified Quality
Manufactured with HMX's god-tier quality control and precision.Free Shipping $80+
30-Day Easy Returns
24h Quick Dispatch
1-Year Warranty
HMX Xinhai 37G — HiFi Linear Switch with PA12 Housing | Factory Lubed · 50M Cycles
$0.36
HMX Flagship Custom Linear Switch
HMX Xinhai Linear Switch
The ultimate symphony of 37gf feather-light touch and crisp, premium acoustics. Tired of muted, scratchy generic linears or heavy springs that fatigue your fingers? HMX, the pinnacle of custom switch manufacturing, brings you the "Xinhai" (Starry Sea) Linear Switch. Engineered for effortless typing and pristine sound, it features a rare PA12 top housing and a POM stem. This acoustic combo delivers a uniquely soft yet high-pitched, clean "Clack". With a 37gf actuation, an aggressive 22mm extended spring, and a punchy 3.4mm early bottom-out, every keystroke feels as light, snappy, and dazzling as a starry sea.
🛡️ 30-Day Risk-Free Trial
🚚 Lightning Shipping
✅ 5-Pin Hot-Swap Compatible
PA12
Top Housing
37gf
Feather Light
22mm
Extended Spring
3.4mm
Early Bottom-Out
Why HMX Xinhai Ends the "Heavy & Muted" Curse?
Muted & Scratchy Acoustics
Many linears sound either too muffled or annoyingly loud. Poor material combinations create scattered, hollow echoes, completely robbing you of that premium, satisfying custom keyboard sound.
Finger Fatigue & Strain
Switches that are too light often feel sticky and slow to return. Conversely, heavy springs (50gf+) cause severe finger joint fatigue and stiffness after hours of coding or gaming.
Sluggish & Mushy Bottom-Out
Standard 4.0mm travel feels unnecessarily long and sluggish during high-speed typing. Furthermore, generic factory lubing often leaves a gritty, friction-heavy feeling behind.
✨ The Endgame Solution: Custom PA12 + POM acoustics, a 37g feather-light touch, and HMX's god-tier factory lube.
Say Goodbye to Muted Thuds
PA12 + POM Crisp Resonance
Feature
Utilizes a rare and meticulously tuned acoustic blend: a PA12 Nylon top housing that softens harsh noises, paired with a POM stem designed to trigger high-frequency resonance.
Advantage
This exact material collision completely purifies the sound profile, eliminating muddy low-end echoes common in full-POM or full-Nylon switches.
Benefit
Every keystroke becomes a refined ASMR experience. The switch delivers an unmistakable, clean, and highly recognizable "Crisp Clack". It's not obnoxiously loud, but incredibly elegant and premium.
Evidence
Highly praised by custom keyboard enthusiasts and sound-test reviewers for producing a "glass-marble-like" pristine acoustic signature.
Say Goodbye to Finger Fatigue
37gf Feather-light & 22mm Spring
Feature
Perfectly dialed into a 37gf actuation force (45gf bottom-out), powered by a highly resilient 22mm single-stage extended spring.
Advantage
The extended spring provides substantial initial resistance to prevent accidental resting misclicks, while the ultra-low 37g force ensures the actual press requires zero effort.
Benefit
It's like walking on clouds. Release the tension in your fingers—you can type or game for 12 hours straight with absolutely zero fatigue. The 22mm spring forces an incredibly snappy, aggressive rebound that keeps your typing rhythm fast and fluid.
Evidence
Favored by professional programmers and hardcore gamers as the ultimate ergonomic solution for high-APM (Actions Per Minute) tasks.
Say Goodbye to Sluggishness
3.4mm Early Bottom-Out & HMX Lube
Feature
Compresses the total travel distance to a punchy 3.4mm (with a 2.0mm actuation). Combined with HMX's legendary, fully automated high-precision factory lubrication.
Advantage
The shortened travel distance means you hit the solid bottom faster. The god-tier factory lube entirely removes spring ping and plastic scratching.
Benefit
Skip the tedious hours of hand-lubing. Out of the box, the Xinhai switch is flawlessly smooth, like cutting through warm butter. The 3.4mm early bottom-out provides a highly satisfying, solid confirmation with every press, dramatically boosting your typing speed.
Evidence
HMX is widely regarded as the "ceiling" of factory-lubed switches in the custom mechanical keyboard community, guaranteeing an out-of-the-box endgame experience.
The Acoustic Evolution
| Spec Comparison | Generic Linear Switch (e.g. Standard Red) | ✨ HMX Xinhai Linear Switch |
|---|---|---|
| Housing Material | Standard PC/Nylon blend (Scattered sound) | Tuned PA12 Top + Nylon Base — Refined acoustics |
| Sound Profile | Prone to spring ping or hollow echoes | Crisp, High-pitched, Premium Clack |
| Actuation Force | 45 – 55gf (Heavy, causes fatigue) | 37 gf — Feather-light, zero fatigue |
| Spring Config | 15mm standard short spring | 22mm Extended Spring — Snappy, bouncy return |
| Total Travel | 4.0 mm (Long and sluggish) | 3.4 mm — Early bottom-out, punchy feedback |
| Lubrication | Often dry, requires tedious hand-lubing | HMX God-tier Factory Lube — Buttery smooth out-of-box |
Technical Specifications
Product NameHMX Xinhai Linear Switch
Switch TypeHIFI Linear Mechanical Switch
ManufacturerHMX
Top HousingPA12 Nylon (Softens overall acoustic profile)
Bottom HousingNylon
Stem MaterialStandard POM (Triggers crisp, high-frequency clack)
Operating Force37 gf (Ultra-light)
Bottom-out Force45 gf
Pre-travel2.0 mm
Total Travel3.40 mm (Early bottom-out)
Spring Specs22 mm Single-Stage Extended Spring
Pin Configuration5-Pin (Clip 2 plastic pins to fit 3-Pin PCBs)
LubricationHMX Precision Factory Lubed
Sound SignatureCrisp, higher-pitched premium resonance (Clack)
Customer Reviews
★★★★★
"This crisp sound is incredibly therapeutic!"
"HMX's sound tuning on the Xinhai is unbelievable. It's not muffled like standard full-POM switches. The PA12 top housing gives the bottom-out a very refined, clean, high-pitched clack. It literally sounds like glass marbles colliding when I type. Absolutely beautiful."
— @AcousticKeeb, Sound Enthusiast
★★★★★
"37g + 22mm spring is the ultimate combo for work."
"I write tens of thousands of lines of code daily. The 37g actuation is a lifesaver; my fingers no longer ache. The best part is the 22mm extended spring—it makes the rebound so fast and snappy, it doesn't feel weak or mushy at all. Highly recommended for typists!"
— @CodeSurfer, Senior Developer
★★★★★
"You can always trust HMX factory lube."
"Just plugged them straight into my hot-swap board. The smoothness is maxed out, absolutely zero scratchiness or spring ping. The 3.4mm early bottom-out makes the typing feel incredibly solid. Definitely one of the most surprising light-linears of the year."
— @LinearAddict, Custom Keeb Veteran
Common Questions
PA12 is a high-end polymer nylon material. In the Xinhai switch, it acts as an excellent "acoustic filter," softening harsh, muddy background noises. When the smooth POM stem bottoms out and rebounds, the PA12 housing shapes the sound into an incredibly crisp, high-pitched, and clean "Clack," completely avoiding the hollow echoes of cheap plastics.
This is a common but unnecessary worry. While 37gf is very light, the Xinhai switch maintains a classic 2.0mm pre-travel and features a 22mm extended spring. The long spring provides excellent initial resistance, preventing misclicks when your fingers simply rest on the keys. It massively relieves typing fatigue, making it perfect for all-day use.
3.4mm is known as an "early bottom-out" design. By shortening the total travel, your keystrokes hit the bottom faster, providing a highly solid and "punchy" feedback. It eliminates the sluggish, draggy feeling of the latter half of a traditional 4.0mm stroke, effectively boosting your high-speed typing rhythm.
Absolutely not! HMX is widely recognized as the "ceiling" for factory lubrication in the custom keeb community. The Xinhai switches undergo incredibly precise automated lubing on the rails, leaves, and springs. They arrive in peak, buttery-smooth condition with zero noise—just plug and play.
Yes, you can! The two extra plastic pins on the bottom of a 5-pin switch are just for extra stability on plateless builds. If your PCB only has 3 holes per switch, simply use a nail clipper or flush cutters to snip off the two small side plastic pins. They will fit perfectly and it will not affect the switch's performance or lifespan whatsoever.
Premium Quality, Worry-Free Support
Fast Logistics
Dispatched in 24h via global lightning logistics. Real-time tracking.Compatibility Pro
Fits 5-Pin & 3-Pin MX PCBs. Free returns on incompatibility.Certified Quality
Manufactured with HMX's god-tier quality control and precision.