Features Of Our Springs

Volute springs (bamboo springs) are springs shaped like bamboo shoots that have a rectangular cross-section wound in a conical shape. They are capable of producing a large load and absorbing energy relative to the space and volume they occupy, making them a suitable spring for shock absorbers. Plate thickness varies from 1 mm or less to thick ones of up to about 32 mm. Large volute springs can support loads up to 500 kN.

Thorough Data Management

Volute springs have been used for decades, and we receive many requests to make an identical product.
We store the manufacturing data used at that time, and so we can always provide the same volute spring as ones in the past.

Key Points on Our Devotion to Handmade Springs

We are the only company that continues to pass on the manufacturing techniques for large volute springs. A heated metal plate is formed into a spiral shape with the skill of our craftsmen, and our years and years of expertise establishes the shape and dimensions while creating “gaps”, which are the most essential parts of the volute spring, to produce the load characteristics required. We do this in a majestic and delicate fashion. All the work that goes into finishing the volute spring is true craftsmanship! If you have any problems with volute springs, please contact us at Tokai Spring.

a. Preparations for materials
The materials of the volute spring are really long and thin boards.
We coil this around a coiling arbor to make form.

b. Coiling
We heat the materials at a high temperature after we coil it up in a spiral.
At this time, it is “a gap” to be important.

c. After coiling
This gap will be a big influence on shape, dimensions and load properties.
It is the time when experience and the skill of craftsmen stand out.
And this is a volute spring after coiling.
If you interested in this, check out our YouTube Channel!
You can see the coiling of the volute spring!