How to Choose Spring Weight: 7 Essential Secrets for a Perfect Float Typing Experience
There is a specific, almost crystalline satisfaction in finding the "perfect" mechanical keyboard setup. It’s that moment when the resistance of the keys matches the intent of your fingers so perfectly that the hardware seemingly disappears. But for many of us—especially those who have graduated from the "mash every key until it hits the floor" school of typing—there is a higher level of play: floating.
Floating is the art of typing where you actuate the switch, register the character, and release the key before the stem hits the bottom of the housing. It is quiet, it is efficient, and it is remarkably easy on the joints. However, achieving this "no bottom out" flow state is nearly impossible if your springs are working against you. If they are too light, you’ll slam into the PCB every time; if they are too heavy, your hands will feel like they’ve just finished a double shift at a manual labor camp by noon.
I’ve spent more money than I care to admit on bags of tiny enthusiast springs, trying to find that "Goldilocks" zone. I’ve lived through the hand cramps of 80g "heavy" builds and the accidental-key-press frustration of 35g "speed" builds. Choosing the right spring weight isn't just about a number on a package; it's about understanding the physics of your own hands and the specific mechanics of the switch you love.
In this guide, we are going to dive deep into the nuance of spring selection. We’ll look at why "bottoming out" happens, how to measure your own typing force, and how to select a spring that pushes back just enough to keep you hovering in that sweet spot of productivity. Whether you’re a startup founder looking for a more ergonomic workday or a developer seeking a quieter office setup, let’s find your perfect weight.
Why Float Typing Changes Everything
Most people type by "bottoming out." You press the key, it travels roughly 4mm, and it stops abruptly when the plastic stem hits the plastic housing. This creates a sharp "clack" sound and sends a small shockwave through your fingertips. Over 10,000 words, those tiny shocks add up to significant finger fatigue and, in some cases, repetitive strain issues.
Float typing is the enthusiast's "secret menu" technique. By training yourself to stop the downward motion right after the actuation point (usually around 1.5mm to 2mm), you turn your keyboard into a cloud. It’s faster because your fingers have less distance to travel back up. It’s quieter because there is no impact. But—and this is a big "but"—it requires a spring that provides a clear, tactile ramp-up in resistance.
If you use a spring that is linear and soft all the way down, your momentum will naturally carry you to the bottom. To float, you need a spring that tells your brain, "Hey, we've registered the key, you can stop now." This is where the specific weight of the spring becomes your most important tool.
The Physics: Bottom-Out vs. Actuation Force
When you look at a switch or a bag of springs, you’ll usually see a weight in grams (e.g., 62g, 67g, 78g). But what does that number actually mean? In the world of mechanical keyboards, there are two numbers that matter, and confusing them is the fastest way to buy the wrong parts.
- Actuation Force: The pressure required to register the keypress.
- Bottom-Out Force: The pressure required to push the key all the way to its physical limit.
For a "float" typist, the Bottom-Out Force is actually the more important metric. You want a bottom-out force that is significantly higher than your natural typing pressure. This creates a "cushion" effect. Think of it like a car's suspension; you want it soft enough to be comfortable, but firm enough that you don't "bottom out" the shocks on every speed bump.
The gap between actuation and bottom-out defines the "slope" of the spring. A steep slope (where bottom-out is much heavier than actuation) is the float-typist's best friend. It provides the biological feedback loop necessary to let go of the key at the perfect micro-second.
The Step-by-Step: How to Choose Spring Weight for No Bottom Out
Choosing a weight is a deeply personal endeavor. However, there is a logical path to finding your number without spending a fortune on every variation available on the market. Here is how I recommend approaching the selection process.
1. Audit Your Current Habits
Before you buy anything, pay attention to how you type now. Do you have "heavy" hands? Do you find that you accidentally trigger keys just by resting your fingers on them? If you find yourself frequently hitting neighboring keys or "fat-fingering" commands, you likely need a heavier spring. If your pinkies start to ache after an hour of typing, you need to go lighter.
2. Use the "Nickel Test" (The Poor Man’s Force Gauge)
If you want to get scientific, a US nickel weighs exactly 5 grams. You can stack nickels on a keycap to see at what weight the switch actuates and at what weight it bottoms out. This gives you a baseline. If your current 50g switches feel like paper, try a spring that requires 12 or 13 nickels (60-65g) to bottom out. It sounds silly, but it’s more accurate than "feeling" it with your brain, which is easily fooled by sound and keycap texture.
3. Target the "Golden Mean" (62g to 67g)
In the enthusiast community, 62g and 67g are the two most popular weights for a reason. They represent the sweet spot for most adult hands. A 62g spring is usually light enough to feel "zippy" but heavy enough to prevent most accidental bottoming out. A 67g spring offers a more deliberate, tactile experience that is very conducive to floating because of the increased resistance toward the end of the stroke.
4. Account for Switch Type
Are you using Linears or Tactiles? This matters immensely. Tactile switches have a "bump" that provides mechanical resistance. If you combine a heavy tactile bump with a heavy spring, you might find the total force required to overcome the bump forces you to bottom out because you have to push so hard to get past the obstacle. For float typing on tactiles, a medium-weight spring (63.5g) often works best to balance the bump without the "clack."
Spring Profiles: Linear, Progressive, and Slow
Not all springs are coiled equal. When you are learning how to choose spring weight, the profile of the spring (the way the force increases) is just as important as the final weight number.
The "Slow Curve" Spring: These are longer springs that have a higher starting force. They feel "consistent" from top to bottom. For float typists, these can be tricky because they don't give a strong signal to stop pressing.
The "Progressive" Spring: These start light and get very heavy at the end. These are the "cheat code" for float typing. The light start makes the keyboard feel easy to use, while the heavy finish acts like a natural brake, stopping your finger before it hits the bottom.
If you are struggling with bottoming out even on heavy springs, try switching to a Progressive spring. A 68g Progressive spring will feel like a 55g spring at the top but will resist like an 80g spring at the bottom. It is the most efficient way to train your hands to float.
Mistakes That Kill Your Typing Flow
I’ve seen a lot of people try to optimize their boards only to end up with a mess. Here are the pitfalls to avoid:
- Going too heavy, too fast: If you jump from a 45g Cherry Red to an 80g custom spring, you will get tendonitis. Your muscles need time to adapt. Move up in increments of 5-10g.
- Ignoring Lube: A dry, scratchy spring will feel "heavier" than a lubed one because of friction. Always lube your springs (the "baggie" method with Krytox GPL 105 is the standard) before deciding if the weight is right.
- Matching all keys perfectly: Some people prefer a heavier spring on the spacebar and modifiers. Since you use your thumb for the spacebar (a much stronger digit), a 70g or 80g spring there can prevent accidental "thumps" while keeping your alphas at a comfortable 62g.
The Float-Typist's Spring Selection Chart
| Typing Style | Recommended Weight | Spring Type | Benefit |
|---|---|---|---|
| Light/Feather Touch | 55g - 60g | Linear / Slow | Zero fatigue, high speed |
| Standard Professional | 62g - 65g | Progressive | Perfect "No Bottom Out" balance |
| Heavy-Handed Writer | 67g - 75g | Two-Stage | Maximum resistance, crisp return |
| Precision/Gaming | 45g - 50g | Linear | Rapid fire, low resistance |
*Weights refer to bottom-out force, not actuation force. Progressive springs are recommended for those struggling to stop before the floor.
Trusted Resources & Technical Data
To dive deeper into the technical specifications of spring metallurgy and switch force curves, consult these authoritative sources:
Frequently Asked Questions
What is the best spring weight for office work?
For most professionals, 62g to 67g is ideal. This range provides enough resistance to prevent accidental keypresses during deep thought but isn't so heavy that it causes fatigue during long typing sessions. If you work in a quiet office, heavier springs can also help dampen the noise by preventing the "clack" of bottoming out.
Can I use light springs and still avoid bottoming out?
It is possible, but it requires much more muscle control. Think of it like playing a piano; you can play softly, but it takes more focus. Using a progressive spring in the 55g range is your best bet if you want a light feel without the impact.
How do I know if I'm bottoming out?
Listen to the sound. If you hear a sharp, high-pitched "clack" at the end of every stroke, you are hitting the bottom. If you only hear a muted "thud" or the sound of the switch actuating, you are floating. You can also feel the impact in your finger joints if you type for long periods.
Do spring weights change over time?
High-quality stainless steel or gold-plated enthusiast springs are incredibly durable and won't noticeably lose their weight for years. However, dirt and lack of lubrication can make them feel "mushy" or heavier over time.
Is "Slow Curve" better for floating?
Not necessarily. Slow curve springs have a more uniform resistance. While some people find this helps them judge depth better, many beginners find that Progressive springs provide a more obvious "stop sign" for their fingers.
Should I change the springs myself?
If you have a "hot-swap" keyboard, it’s a fun and easy afternoon project. You’ll need a switch puller and a switch opener. If your keyboard is soldered, you’ll have to desolder every switch—which is a much bigger commitment. For most, buying a bag of 67g springs and swapping them into hot-swap switches is the best way to experiment.
Final Thoughts: The Path to Typing Zen
At the end of the day, how to choose spring weight isn't about following a rigid rulebook; it's about listening to your body. Your keyboard shouldn't be a source of strain—it should be a tool that augments your flow. If you find yourself constantly smashing your keys into the desk, take it as a sign that your hardware isn't keeping up with your hands.
Try the 63.5g or 67g Progressive route. It’s the most common "aha!" moment for typists who realize they don't have to fight their keyboard. Once you master the float, you’ll find your typing speed increases, your noise levels drop, and your hands feel fresh even after a 10-hour sprint.
Don't be afraid to experiment. Springs are the cheapest part of a custom keyboard, yet they have the largest impact on how it actually feels to use. Grab a few different weights, lube them up, and see which one makes you forget you're even typing.
Ready to transform your typing? Check your keyboard's compatibility today and consider ordering a small sample pack of enthusiast springs to find your perfect weight.
