These springs can also be used in combination with other springs to adjust the stiffness of your joystick.
Seimitsu Spring Tension Guide
Seimitsu LS-32/40 Joystick Spring
This is a replacement spring for the Seimitsu LS-32(-01) & LS-40(-01) joysticks.
Seimitsu LS-33 Joystick Spring
This is a replacement spring for the Seimitsu LS-33 joystick.
Seimitsu LS-55 Joystick Spring
This is a replacement spring for the Seimitsu LS-55(-01) joysticks.
Seimitsu LS-56 Joystick Spring
This is a replacement spring for the Seimitsu LS-56(-01) joysticks.
Seimitsu LS-60 Joystick Spring
This is a replacement spring for the Seimitsu LS-60 joysticks.
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I bought this spring for my Capcom Power Stick Fighter (SNES) because the old one was worn out. This spring i a bit smaller than the original but it fits perfectly!
I wanted to change the Spring on my both NEO GEO sticks, the Old Style (Original) and the Pro CD Controller (Bean). The LS-56 Spring is Perfect, it fits exactly like it should. After the Installation the stick felt much better and stronger. So NEO GEO fans if you want to change the Spring on your Sticks, buy the LS-56 Spring!
I replaced my stock Hayabusa spring on my Hori RAP 4 Kai with this spring. The stiffness is noticeable while still retaining some freedom that the old spring had without feeling loose. A brilliant upgrade.
Used this to replace the weak flimsy spring that came with the neogeo x controller, controlling the joystick is a lot more fluent now.
I currently use the LS-55 spring for my Sanwa JLF, It has a nice medium stiffness to it compared to the light stock JLF spring. I also have a LS-33 spring which is even lighter than the stock JLF spring. Both of these springs can be combined with the stock JLF spring, combine the LS-55 for a heavy spring or combine the LS-33 for medium stiffness similar to the LS-55.