Custom Spring Examples
We deliver high-quality springs with proven expertise and flexible support.
From One-Off Prototypes to Mass Production
Springs come in a wide variety of shapes, with each design differing in material, function, and size depending on its intended use and operating environment.
Fusehatsu is a spring manufacturer specializing in small-lot, high-mix production.
We offer flexible support for everything from one-off prototypes to full-scale manufacturing.
We also handle surface treatments such as plating and painting, spring unit assembly, and welding—all in-house.
We also handle surface treatments such as plating and painting, spring unit assembly, and welding—all in-house.
To meet a wide range of requirements, your dedicated sales representative will assist you in selecting materials, determining processing methods, and supporting your manufacturing needs.
Feel free to consult us about anything related to springs—we’re here to help.
Feel free to consult us about anything related to springs—we’re here to help.

Examples of Spring Applications
Compression Spring
A compression spring—also known as a "push spring"—is a type of wire spring designed to withstand compressive force.
It is one of the most common and widely used spring types.
It is one of the most common and widely used spring types.
Compression springs can be categorized by shape, including standard cylindrical coil springs, as well as conical, barrel-shaped, hourglass-shaped, and single-tapered coil springs.

Examples
Extension Spring
An extension spring—also known as a tension spring—is a type of wire spring designed to withstand pulling forces.
It is one of the most common spring types.
It is one of the most common spring types.
Extension springs come with a variety of hook shapes depending on the application.

Examples
Torsion Spring
A torsion spring—also known as a kick spring—can take various shapes depending on how it is mounted.
It may be used in either a winding (coiling) or unwinding direction, depending on the application.

Examples
Double Torsion Spring
We manufacture double torsion springs tailored to your application.
Dimensional and load tolerances comply with JSMA/SB001 (JIS B 0103) standards.

Examples
Wire Form Spring
Wire-formed springs—also known as wire formings—come in a wide variety of shapes with no fixed standard.
They are custom-made to suit each specific application.

Examples
Flat Spring
Flat springs—also known simply as plate springs—come in various shapes with no fixed standard.
Each design is customized to meet specific functional requirements.

Examples
Ring Spring
We manufacture all types of ring springs to suit your specific application.
Dimensional and load tolerances comply with JSMA/SB001 (JIS B 0103) standards.

Examples
Custom-Shaped Spring Ball
The “Onigiri Ball” is Fusehatsu’s original product—a ball-shaped spring designed to help you strengthen your grip by simply squeezing it.
Golfers, for example, can use it like they’re holding a club to improve left-hand sensitivity.
It’s also great for use during desk work, strength training, or simply when you have a bit of free time.
It’s also great for use during desk work, strength training, or simply when you have a bit of free time.

If you have any questions about spring prototypes or other concerns,
feel free to contact us!
If you’re unsure about product selection, specifications, or have technical inquiries, please don’t hesitate to reach out.