part · switch

Gazzew Boba U4

Spec sheet

Type: silent-tactile
Top housing: nylon
Bottom housing: nylon
Stem: pom
Spring: 62g actuation · 68g bottom-out
Travel: 4 mm
Factory lubed: yes
Released: Jun 1, 2020

Silent tactile with a round, pronounced bump at the top of the stroke and foam dampeners on both upstroke and downstroke. The nylon housing produces a muted thud rather than a clack; popular in office environments. Comes pre-lubed on the rails; builders often rattle-mod the spring for a cleaner sound.

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Mentioned in 3 articles

A switch housing split open in cross-section, with coral accent lines marking the four application points where lube changes a switch's character.

Ideas

Lubing switches: what to use, how much, and what to skip

Four lubes, four application points, and one rule that prevents most mistakes: over-lubing is irreversible, under-lubing is not. Here is the practical reference.

thockJun 5, 202610 min read

Cross-section line drawing of a mechanical keyboard stack — keycaps, switches, plate, PCB, gasket socks, case, and desk surface — each layer labeled with its acoustic role and drawn in a single warm-grey stroke with an ochre splash highlighting the plate and a brass-bronze theme dot at the upper right.

Deep Dives

The physics of thock: how every layer shapes your keyboard's sound

Every component between your fingertip and the desk makes a decision about your keyboard's sound — the switch, the plate, the case, the surface it sits on. Understanding what each layer adds or subtracts is the difference between chasing a sound blindly and engineering it deliberately.

thockJun 3, 202615 min read

Vertical exploded-stack diagram of a mechanical switch, drawn in a single warm-grey stroke with horizontal dashed explode-lines and an ochre splash highlighting the cruciform stem top.

Guides

A beginner's guide to picking your first switch

Switches are the single biggest factor in how a keyboard feels and sounds, and the catalog has grown overwhelming. This guide narrows the entire market into three families, explains who each one is for, and gives a three-step path from curiosity to a confident first purchase. By the end, the reader can pick a category without second-guessing.

thockApr 30, 20267 min read

Gazzew Boba U4 appears in editor-curated build sheets.

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