Gateron CM vs. HMX FJ400
An in-depth look at the Gateron CM and the HMX FJ400 switches—which one is the best fit for you?
Overview
When it comes to selecting the perfect mechanical keyboard switch, the Gateron CM and HMX FJ400 both present compelling options, despite their shared linear characteristics. The Gateron CM sets itself apart with a robust nylon housing that not only enhances its auditory appeal—delivering a richer, deeper sound profile—but also offers an impeccably smooth typing experience thanks to its high-quality factory lubrication. The unique dual-staged spring adds a delightful bounce, making each keystroke feel fluid and enjoyable. On the other hand, the HMX FJ400 finds its strength in its balanced sound profile, striking a chord that appeals to those seeking versatility in their typing experience. While the CM emphasizes a luxurious, thocky feedback with each press, the FJ400 offers a more subdued tone that caters to a broader range of preferences. As both switches possess their own unique advantages, ultimately your choice will depend on your specific needs and style. However, let's dive in a bit deeper beyond generalities so you can best decide on the best switch for you.
By the numbers
Technical specifications
Actuation force
55g
Actuation force
50g
Bottom-out force
63.5g
Bottom-out force
58g
Pre-travel
2.00 mm
Pre-travel
2.00 mm
Total travel
3.60 mm
Total travel
3.80 mm
Factory lubed
Yes
Factory lubed
Yes
Stem construction
Standard
Stem construction
Standard
Stem material
POM
Stem material
T2
Top housing material
Nylon
Top housing material
POM
Bottom housing material
Nylon
Bottom housing material
Nylon
Mount type
PCB (5-pin)
Mount type
PCB (5-pin)
Spring
Dual-staged 20mm lengthened gold-plated spring
Spring
22mm single-stage spring
Housing materials
When comparing the housing materials of the Gateron CM and the HMX FJ400, we find a distinct difference in the materials used for the top housings. The Gateron CM features a nylon top housing, which is characterized by its ability to absorb sound, resulting in a deeper and fuller sound profile. This softer plastic helps create a duller and rounder tone, allowing for a more muted typing experience. In contrast, the HMX FJ400's top housing is made from POM (Polyoxymethylene), which also offers a deeper sound profile, but does so in a different manner. While POM has its own unique acoustic qualities, it tends to have a reasonable degree of sound absorption, resulting in a similarly muted characteristic when typing, albeit with a more distinct timbre compared to the softer nylon.
Both switches, however, share nylon as the material for their bottom housings. The Gateron CM and FJ400's nylon bottoms provide a complementary effect to their overall sound experience. Since nylon is a classic switch housing material, it contributes to producing a rounder and fuller sound profile for both switches, particularly during key press bottoming out. This shared use of nylon in the bottom housings means that both switches will elicit a similar tactile and auditory response when the key is fully pressed down, preserving that deep sound that typists often favor.
As a result, while the Gateron CM and HMX FJ400 differ in their top housing materials, the consistent use of nylon in the bottom housing means that users can expect a comparable overall typing experience in terms of sound profile when bottoming out. The POM top of the FJ400 offers its unique sonic attributes upon key release, potentially bringing a richer auditory experience to users compared to the CM's nylon top. Nevertheless, the overall sound signature will still maintain a degree of similarity due to the shared characteristic of the nylon bottom housing, blending the different qualities of the top materials and creating a harmonious typing experience.
Weight
The Gateron CM linear switch and the HMX FJ400 linear switch exhibit notable differences in their actuation and bottom-out forces, influencing the overall typing experience. The Gateron CM requires a heavier actuation force of 55 grams and has a bottom-out force of 63.5 grams, categorizing it as medium-heavy. In contrast, the HMX FJ400 is lighter with an actuation force of 50 grams and a bottom-out force of 58 grams, placing it in the medium range. This means that for those who prefer a lighter switch for prolonged typing or gaming sessions, the FJ400 would be a better choice, as it requires less force to actuate and bottom out. On the other hand, individuals favoring a more substantial typing experience may gravitate towards the Gateron CM, given its heavier push feel, which can enhance tactile feedback. Overall, the CM is heavier than the FJ400, leading to varying preferences based on individual typing styles and needs.
Travel distance
When comparing the travel distance of the Gateron CM linear switch and the HMX FJ400 linear switch, we find that the Gateron CM has a travel distance of 3.6 mm, while the HMX FJ400 extends slightly further at 3.8 mm. This means that the Gateron CM is the shorter of the two switches, offering a more responsive feel that could be favorable for gamers seeking quicker actuation. In contrast, the HMX FJ400, with its longer travel distance, may provide a deeper, more substantial keystroke that some users might find more satisfying, although it could also feel less immediate in terms of responsiveness. Ultimately, users must decide based on their preference for either the swifter action of the Gateron CM or the richer feedback of the HMX FJ400.
Price comparison
Which switch is more bang for your buck?
The Gateron CM has an MSRP of $4.80 per 10 switches. At Milktooth, we are able to pass on savings to our customers and offer the CM for $4.25.
The HMX FJ400 has an MSRP of $3.50 per 10 switches. At Milktooth, we are able to pass on savings to our customers and offer the FJ400 for $3.29.
Here at Milktooth, we offer the best prices on switches (on average, 27% lower the competition). In addition, we offer free shipping on orders over $49.00. We also offer free returns and exchanges, so you can shop with guaranteed satisfaction.
That said, while price is an important piece of the puzzle, our opinion is that you should ultimately pick the option that most suits your unique preferences since you’ll be using these switches for years to come. In other words, finding something perfect for you is, in our view, the most important criteria.
Typing experience
When it comes to sound, the Gateron CM linear switch is characterized by its deep, bassy output, delivering a rich and satisfying audio experience with every keystroke. This switch produces a low-pitched and thocky sound, reminiscent of a soft thud or a warm knock, which many typists find appealing for both tactile feedback and ambient enjoyment. In contrast, the HMX FJ400 linear switch offers a more balanced sound profile, though specifics in detail about its auditory qualities remain unspecified. Therefore, while the CM is known for its deeper and fuller acoustics, the FJ400 may present a more neutral experience, indicative of a less pronounced sound signature.
In terms of feel, the Gateron CM shines with descriptors such as buttery, polished, creamy, and frictionless, indicating a smooth and seamless typing experience. The factory lube job on the CM ensures that each keystroke feels fluid and effortless, making it a pleasure to type on for extended periods. On the other hand, the FJ400 lacks detailed descriptors regarding its tactile feel, leaving it unclear how its typing sensation compares to that of the CM. As a result, while the CM promises an exceptionally smooth and refined experience, the touch feedback of the FJ400 is still unknown.
In conclusion, the Gateron CM linear switch presents a distinct advantage in both sound and feel with its rich, low-pitched auditory signature and smooth, polished typing experience. With its factory lubrication and carefully designed construction, the CM excels in delivering an immersive experience that typists often seek. Meanwhile, the HMX FJ400, while serving as a balanced alternative, lacks detailed insights into its auditory and tactile characteristics. Thus, choosing between these two will likely come down to personal preference; if sound and feel are paramount to your typing experience, the Gateron CM is the stronger candidate.
Conclusion
To conclude, your choice between the Gateron CM linear switch and the HMX FJ400 linear switch will largely depend on your personal preferences and typing style. If you appreciate a medium-heavy typing experience with a bouncy feel, the Gateron CM could be your go-to option. Its full nylon housing and impeccable factory lube provide not just a uniquely rich and deep sound signature—characterized by bassy and thocky tones—but also a buttery and frictionless feel that makes typing joyous and satisfying. This switch is particularly appealing if you're looking for that tactile delight during extended typing sessions or gaming marathons. On the other hand, if you prefer a slightly lighter touch with a bottom-out force of 58 grams, the HMX FJ400 offers a balanced sound profile, making it an excellent choice if you seek an unobtrusive yet reliable switch. While the FJ400 might not have the same depth in sound or the luxurious feel of the Gateron CM, it provides a dependable typing experience that works well for both everyday use and professional settings. Ultimately, your decision should hinge on whether you value a heavier, richer experience or a lighter, balanced one that still maintains quality.
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