The lighter and firmer variants provide two levels of initial keypress resistance while retaining the same linear mechanism.
Description
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HMX Egg Yolk Linear Switch ...
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Hybrid Mold Construction
HMX’s Hybrid Molding System in a Linear Switch
The HMX Egg Yolk is a linear switch designed by KK Lab and manufactured by HMX. It is the first HMX switch on the current product page to use the company’s Hybrid Molding System, allowing the bottom housing and its center mast to use different materials.
The bottom housing is PA66 reinforced with 10% fiberglass, while the center mast uses HMX’s S1 material. This construction is paired with an M2 strengthened PP stem and a PC top housing, giving the Egg Yolk a material layout that differs from conventional single-material bottom housings.
Specification Guide
Choose Between the 45g and 53g Bottom-Out Variants
The Egg Yolk is currently offered in two spring-weight variants. Both use the same confirmed 2.0mm pre-travel, 3.6±0.2mm total travel and 22mm KOS single-stage extended spring design.
Choose the 45g option for the lighter bottom-out or the 53g option for a firmer end of travel.
The listed pre-travel is the distance before actuation; keyboard firmware and the complete build also affect the overall response experience.
The Egg Yolk uses a slightly shortened total travel compared with a traditional 4mm-class switch.
Materials & Factory Lube
Four Confirmed Material Roles in One Switch
The Egg Yolk combines several different materials instead of relying on one housing blend. HMX’s hybrid mold separates the bottom housing body from the center mast so each can use a different material.
- Stem: M2 strengthened PP.
- Top housing: PC.
- Bottom housing: PA66 with 10% fiberglass.
- Bottom-housing center mast: HMX S1.
Factory lubrication is also applied selectively: the stem legs and sliders receive a very thin coat of 205g0, while the spring and leaf use dry-film lubrication. The bottom housing and the area near the stem pole are kept dry.
Weight & Build Fit
Who Is the HMX Egg Yolk Most Likely to Suit?
The Egg Yolk is a linear switch with two spring-weight choices and a distinctive hybrid-mold material configuration. It is best considered by users who want a smooth, uninterrupted linear keypress and who value the option to choose a lighter or firmer bottom-out.
May Suit
- Users who prefer a linear switch without a tactile bump or click mechanism.
- Enthusiasts interested in HMX’s hybrid-mold bottom-housing construction.
- Buyers who want a choice between 45g and 53g bottom-out variants.
- Typing or gaming builds where a factory-lubed linear switch is preferred.
May Not Suit
- Users specifically looking for tactile feedback.
- Buyers who want a clicky switch mechanism.
- Users who require a confirmed silent or low-noise switch.
- Anyone who prefers a traditional 4mm-class total travel.
Before You Order
Pack Size, Variant Selection and Compatibility
One quantity contains 10 switches. Select the preferred spring variant first—45g bottom-out or 53g bottom-out—then calculate the number of 10-switch packs required for the full keyboard layout.
The current product specifications do not state universal compatibility with every keyboard. Before ordering, compare the switch format shown in the product photos with the PCB, plate and mounting requirements of the intended keyboard.
Ordering note: Each cart quantity equals 10 switches. For a full board, count all switch positions and add spare switches if desired.
Product Questions
HMX Egg Yolk Linear Switch FAQ
Is the HMX Egg Yolk a linear switch?
Yes. The Egg Yolk is specified as a linear mechanical keyboard switch, so the keypress is designed without a tactile bump or click mechanism.
What is HMX’s Hybrid Molding System?
On this product, the Hybrid Molding System allows the bottom-housing body and the center mast to use different materials. The confirmed specifications list PA66 with 10% fiberglass for the bottom housing and HMX S1 for the center mast.
What materials are used in the Egg Yolk switch?
The confirmed specifications list an M2 strengthened PP stem, PC top housing, PA66 bottom housing with 10% fiberglass, and an S1 bottom-housing center mast.
What spring-weight variants are available?
The current page offers 45g and 53g bottom-out variants. Their corresponding operating-force specifications are 37±2g and 43±2g.
How much travel does the HMX Egg Yolk have?
The product specifications list 2.0mm pre-travel and 3.6±0.2mm total travel.
Is the HMX Egg Yolk factory lubed?
Yes. A very thin coat of 205g0 is applied to the stem legs and sliders, while the spring and leaf use dry-film lubrication. The bottom housing and the area near the stem pole are kept dry.
What spring does the Egg Yolk use?
The confirmed specification is a 22mm KOS single-stage extended spring.
How many switches are included per quantity?
Each quantity contains 10 switches. Select the preferred spring-weight variant and order enough 10-switch sets for the intended layout.