STON specializes in the manufacture of Leaf Springs.A leaf spring is a simple type of suspension spring
commonly used in vehicles.This type of spring is typically constructed of one or more flat,think,flexible steel strips that are joined together in order to work as a single unit.Leaf springs are usually more able to evenly distribute the weight of a heavy load than ordinary coil-type springs.
Manufacturing:
Our dedicated sales team identify your specific requirements and select the appropriate specification sheet.This is issued to the production team as a job card, specification job cards always contain a unique job reference number enabling total traceability throughout the entire manufacturing process.
Spring steel is sheared to the length required by the specification and processed through the required manufacturing operations, including eye forming, drilling, punching, and wrapping.
The leaves are then passed to heat treatment (1,000 - 1,050°C), shaped and oil quenched to give a quenching temperature of no less than 890°C. After draining, they are tempered at 500 - 560°C to give the correct hardness before final adjustment to give correct shape and camber.
On the final assembly line, the required components are added, i.e. bushes, clips, centre bolts, etc. to complete the spring, which is again checked against the specification sheet. The spring is then either painted or finished to the customer's requirements.
Quality Assurance:
We are ISO/TS16949 and ISO9001:2000 qualified.
Ston is totally committed to quality, Every spring goes through the same vigorous inspection process to insure satisfaction. Our aim is to continually improve quality, efficiency and the service we provide for the overall benefit of our customers.
Products Variants:
- Parabolic Leaf Spring
- Multi Leaf Spring
- Z-Type Leaf Spring
- U Bolts