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The Kailh Calligraphy and Unikeys x BSUN Udon switches are both standard MX mechanical switches of the linear breed. They both feature standard stem shape, 2 mm pre-travel, however, they come with different top housing (LCP (lyquid crystal polymer) vs PC), bottom housing (LCP (lyquid crystal polymer) vs PA66 + 30% fiberglass), stem material (MF (melamine formaldehyde) vs Y3X), spring (20 mm single-stage extended KOS vs 22 mm single-stage nickel-plated), actuation (42 g vs 48 g), bottom-out force (50 g vs 55 g), total travel (3.80 mm vs 3.60 mm). That said, they are mostly different. Let's check out this side-by-side specs rundawn with details, availability -- and even current prices -- to figure out which one fits you the best!
The Kailh Calligraphy is a linear standard MX mechanical switch with LCP (lyquid crystal polymer) top housing, LCP (lyquid crystal polymer) bottom housing, and MF (melamine formaldehyde) stem (standard shape). It features a 20 mm single-stage extended KOS spring. The 42g actuation occurs at 2mm. The 50g bottom-out occurs at 3.80mm. Extra: Light diffuser. Factory lubing? Yes! Designed by Kailh. Manufactured by Kailh. | The Unikeys x BSUN Udon is a linear standard MX mechanical switch with PC top housing, PA66 + 30% fiberglass bottom housing, and Y3X stem (standard shape). It features a 22 mm single-stage nickel-plated spring. The 48g actuation occurs at 2mm. The 55g bottom-out occurs at 3.60mm. Factory lubing? Yes! Designed by Unikeys. Manufactured by BSUN. |
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| Name | Kailh Calligraphy | Unikeys x BSUN Udon |
|---|---|---|
| Type | linear | linear |
| Footprint | 5-pin | 5-pin |
| Top housing | LCP (lyquid crystal polymer) | PC |
| Bottom housing | LCP (lyquid crystal polymer) | PA66 + 30% fiberglass |
| Stem material | MF (melamine formaldehyde) | Y3X |
| Stem shape | standard | standard |
| Spring | 20 mm single-stage extended KOS | 22 mm single-stage nickel-plated |
| Actuation | 42 g | 48 g |
| Bottom-out | 50 g | 55 g |
| Pre-travel | 2 mm | 2 mm |
| Total travel | 3.80 mm | 3.60 mm |
| Lube | Factory lubing? Yes! | Factory lubing? Yes! Factory lubed. The upper section of stem sliders is lubed only to avoid lube pooling issues. Springs are lubed with dry film. |
| Designer | Kailh | Unikeys |
| Manufacturer | Kailh | BSUN |
By tracking prices and in-stock status of 30+ well-known keyboard stores worldwide, we can state that the Unikeys x BSUN Udon is available at a single shop at the moment, while the Kailh Calligraphy can be found in multiple stores.
Clicking the links below take you to some notable keyboard shops offering Kailh Calligraphy and Unikeys x BSUN Udon switches. When accepted, the prices indicated already include the discount - use the KBDNEWS coupon code at checkout to claim your saving!
Prices, discounts, and stock status are checked regularly; however, changes since the last update cannot be ruled out. Everything here is for informational purposes only. Check the product pages for the latest prices!
Comments on Kailh Calligraphy switches | Comments on Unikeys x BSUN Udon switches |
The Calligraphy switch is definitely one of the most unique switches of 2025. Kailh went above and beyond, creating customized stem and housing molds just for the MF and LCP materials used to manufacture this switch. The results are nice. Calligraphy switches have a clean, loud, full, and clacky sound profile. These switches don't have any ticking or spring noise, not even a bit. Factory lubing is on point which makes them super smooth. Furthermore, they come with a satisfying scratchy and grainy feeling. They probably have the best non-Cherry scratch there is. Even better than Kailh BCP which was known for having the pleasing scratchy feeling – Unikeys. | The Unikeys Udon linear switch is our attempt at trying to create a clacky BSUN switch that is not thin-sounding. The stem material, Y3X, is the same as the Jade Rosales switches; It can be considered an improved LY or Y3 material, and Y3X is slightly softer than LY but much smoother than both LY and Y3. We chose to pair it with a modified PA66 bottom housing to create a full but clacky-sounding bottom out. The PC top housing gives them a clean and sharp top-out sound. Overall, these will be one of the more clacky new BSUN switches in our collection. In order to prevent the lube pooling issues, we chose to only lube the stem sliders and legs with a very thin coat of 205g0. Springs are lubed with dry film – Unikeys. |
