WJBY Lab × HMX Longjing Tea S Tactile Switch
02 / THE ESSENTIALS

WJBY Lab × HMX Longjing Tea S Tactile Switch at a Glance

45 gf
Operating force
50 gf
Bottom-out force
2 mm
Pre-travel
3.7 ± 0.3 mm
Total travel
5-pin
Mount

Compatibility & build notes

Longjing S uses a five-pin MX-style mechanical footprint. It is intended for conventional mechanical keyboard PCBs and compatible hot-swap sockets, not Hall Effect or magnetic systems. Check that the PCB accepts five-pin switches because boards designed only around a three-pin footprint may not provide clearance for the two locating pins.

Both force options are factory lubricated.

Longjing S is a conventional 5-pin MX-style mechanical switch, not a Hall Effect switch. A hot-swap keyboard must specifically accept standard five-pin MX-style switches, so check the PCB and socket before ordering. The 10-switch pack suits testing or replacements; the 70-switch pack can cover many compact layouts, but some 75%, TKL and full-size boards need more, so count the actual switch positions first.

Construction

Operating force45 gf
Bottom-out force50 gf
Pre-travel2 mm
Total travel3.7 ± 0.3 mm
Mount5-pin

Compare with similar switches

Use verified force, travel, mount and lubrication fields to see how this switch differs from nearby alternatives.

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Compare with similar switches
WJBY Lab × HMX Longjing Tea S Tactile Switch

WJBY Lab × HMX Longjing Tea S Tactile Switch

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Type Tactile Type Tactile
Operating force 45 gf Operating force 55 gf
Bottom-out force 50 gf Bottom-out force 62 gf
Pre-travel 2 mm Pre-travel 2.2 mm
Total travel 3.7 ± 0.3 mm Total travel 3.2 mm
Mount 5-pin Mount 5-pin
Factory lube Yes Factory lube Yes

Detailed specifications

Brand
HMX
Switch Type
Tactile
Operating Force
45 gf
Bottom-out Force
50 gf
Pre-travel
2 mm
Total Travel
3.7 ± 0.3 mm
Stem Material
POM
Top Housing
PA66
Bottom Housing
PA66
Factory Lubed
Yes
Mount
5-pin
Sound Profile
Light tactile; clean/clacky-leaning tendency
Typing Feel
Subtle light tactile bump with selectable 37gf or 45gf resistance

Good to Know

A strong fit if you want

  • Typists who want tactile feedback without the fatigue of a heavy or sharply defined bump
  • HMX users moving from linear switches toward a lighter tactile response with familiar smoothness
  • Five-pin MX-style mechanical keyboard builds that can use factory-lubed switches without extra prep

Trade-offs and compatibility checks

  • The tactile event is intentionally subtle and may feel too gentle for fans of strong tactile bumps
  • The 37gf option is the lighter choice.
  • Total travel is listed per the product specification.
A restrained tactile direction

CORE EXPERIENCE

A restrained tactile direction

Longjing Tea S is a light tactile switch built around a subtle bump and a longer-travel feel.

It is for buyers who want tactile guidance without a large, abrupt event.

  • 37gf provides the lower-force option for users who prioritize easy repeated presses and lower finger effort
  • 45gf adds resistance while remaining a light tactile option.
  • Both versions use the same verified five-pin PA66/POM product family and factory-lubed construction

Bottom line: A subtle tactile choice with a longer-travel direction.

A choice between easier and firmer tactility

WHAT MATTERS

A choice between easier and firmer tactility

The 37gf and 45gf options let buyers choose an easier or slightly firmer press while keeping the product’s restrained tactile character.

Construction facts matter as part of the switch format; they do not predict one fixed sound.

  • POM is the stem material for both force options.
  • PA66 is used for both the top and bottom housings.
  • The 22mm single-stage extended KOS spring applies to the 45gf option.

What it means: Choose resistance without changing the subtle-bump intent.

Confirm the footprint before choosing quantity

FIVE-PIN FIT

Confirm the footprint before choosing quantity

Longjing Tea S uses a five-pin MX-style footprint. Confirm that the PCB and hot-swap socket accept the two locating pins before ordering a tester or full-build pack.

Once fit is confirmed, choose quantity from the board’s actual switch count and any desired spares.

  • Pre-travel is listed at 2.0mm with a ±0.3mm tolerance.
  • Total travel is 3.7 ± 0.3 mm.

Spec transparency: Verify five-pin fit before planning quantity.

For a subtle tactile preference

WHO IT SUITS

For a subtle tactile preference

Choose Longjing Tea S when you want light resistance and a restrained tactile event.

Choose a large-bump tactile for stronger feedback or a linear when uninterrupted travel is the priority.

  • 37gf is the easier-press option and is best considered when lower resistance is the main priority
  • 45gf is slightly firmer and is the more consistently specified option.
  • Both options use the same five-pin mount, PA66 housings, POM stem and factory-lubed construction.

Build note: A light tactile option for restrained feedback.

Questions about WJBY Lab × HMX Longjing Tea S Tactile Switch

Is HMX Longjing S linear or tactile?

Longjing S is a tactile MX-style mechanical switch. Its bump is intentionally light and restrained rather than sharply pronounced. Two operating-force options are offered — 37gf and 45gf — so you can choose a lighter or slightly firmer version within the same five-pin PA66/POM product family.

What is the difference between the 37gf and 45gf versions?

The difference is force. The 37gf version uses 37±5gf operating, 45±5gf tactile and 43gf bottom-out. The 45gf version uses 45±5gf operating, 52±5gf tactile and 50gf bottom-out.

Which HMX Longjing S version should I choose?

Choose 37gf if your priority is lower resistance and easier repeated presses. Choose 45gf if you prefer a little more firmness. Both are still light-tactile choices, so neither should be expected to feel like a heavy or aggressively tactile switch.

Are HMX Longjing S switches factory lubed?

Yes. Both the 37gf and 45gf Longjing S switches are factory lubricated. They are not hand lubed, and a specific lubricant formula is not published.

Are HMX Longjing S switches 5-pin?

Yes. The Longjing S is a five-pin MX-style switch. Check the PCB before ordering because a five-pin switch requires clearance for the two additional plastic locating pins.

Will Longjing S work in a hot-swap keyboard?

It can work in a hot-swap keyboard when the PCB and sockets support standard five-pin MX-style mechanical switches. Hot-swap compatibility belongs to the keyboard system rather than the switch alone, so do not assume every hot-swap board accepts five-pin mounting. This conventional switch is not intended for Hall Effect or magnetic-switch PCBs.

What is the total travel of HMX Longjing S?

Total travel is 3.7 ± 0.3 mm, and conducting (pre) travel is 2.0 ± 0.3 mm.

How many Longjing S switches should I buy?

Count the switch positions on your exact keyboard layout and add a few spares. The 10-switch pack is useful for testing, macro pads or replacements, while the 70-switch pack can cover many compact builds. Some 65%, 75%, TKL and full-size keyboards need more than 70 switches, so confirm your layout before ordering.