Manufacturer Seimitsu is well known for the PS series pushbutton, whose microswitch differentiates itself by requiring just a bit more force to actuate. The MM9-3 spring adds an extra .13 LBF (pounds force) to Seimitsu's 30mm pushbutton series. This is desirable to some who appreciate a slightly more deliberate input force and a bit less sensitivity than Sanwa's SW-68 offers.
Adds .13N for Total of 1.13N (0.254 LBF)
By default, Seimitsu microswitch requires 1.0N or 0.2 LBF (pounds force) to each button. The MM9-3 adds .13N, for a total of 0.254 LBF. The result is a light but firm button input requirement and quicker return to neutral.
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Seimitsu
Seimitsu PS Button Spring MM9-3 - 0.13N (PS-14-Dx/K/PS-15)
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Great Springs for those that want a bit more force.
A lot of people like the more lighter tension Sanwa buttons. I am not one of those people. I prefer seimitsu buttons which require a tad bit more force to press. Recently, however, the stock buttons were starting to feel lighter to me after a couple years of use. That’s when I decided to give these springs a shot. I was on the fence about getting springs as I heard they make the buttons a lot harder to press. I opted to get the lightest tension for my seimitsu ps14-k 30mm buttons to test it out. I’ve been using them for over a month now as of the time of this review and I can say they definitely provide that little bit of additional force I wanted in my buttons. It’s a slight but noticiable difference and may take a small adjustment period. Unless you know for sure you like really heavy button presses, I would definitely recommend getting this particular tension (.13n) if you want more force in your seimitsu buttons. I feel like it should be enough for most people. I definitely love them and will use these from now on in all my arcade sticks! Unknown on May 19th 2024