FAQS

Frequently asked questions about wave springs, including spiral retaining ring, gap wave spring washers, overlap wavy spring, multi-turn wave springs,nested wave spring,linear wave spring,laminar seal ring.

GENERAL QUESTIONS

We warranty our materials and workmanship. Our commitment is to your satisfaction with our products. In warranty or not, it is the culture of our company to address and resolve all customer issues to everyone’s satisfaction

For samples, the lead time is about 7 days. For mass production, the lead time is 20-30 days after receiving the deposit payment. The lead times become effective when (1) we have received your deposit, and (2) we have your final approval for your products. If our lead times do not work with your deadline, please go over your requirements with your sale. In all cases we will try to accommodate your needs. In most cases we are able to do so.

Yes, we can provide most documents including Certificates of Analysis / Conformance; Insurance; Origin, and other export documents where required.

Yes, we require all international orders to have an ongoing minimum order quantity. If you are looking to resell but in much smaller quantities, we recommend you check out our website

Lispring can manufacture Wave Springs with the following dimensions:

.Maximum: Outer diameter ∅1500mm
.Minimum: Outer diameter ∅2.5mm
Lispring can manufacture Spiral Retaining Rings with the following dimensions:

.Maximum: Outer diameter ∅1500mm
.Minimum: Outer diameter ∅2.0mm

Common Materials for Lispring Spiral Retaining Rings:

.High Carbon Steel
65Mn: Commonly used grade in China
SAE1070-1090: American grade
.Stainless Steel
SUS304H: Japanese standard designation, equivalent to 06Cr19Ni10 in the Chinese standard
SUS316: Japanese standard designation, equivalent to 06Cr17Ni12Mo2 in the Chinese standard
SUS302: Generally used as grade 302 in European and American countries
.Special Alloy Materials
A-286 (GH2132): Iron-based alloy, resistant to high temperature and corrosion, with a maximum recommended temperature of 538°C and relatively high cost-effectiveness
Inconel X-750 (GH4145): Nickel-based alloy containing 75% nickel, commonly used in acid-base environments, with a maximum recommended temperature of 538°C
Inconel X718 (GH4169): Nickel-based alloy with strong corrosion resistance, a maximum recommended temperature of 704°C, and commonly used in high-temperature environments. The wave springs used in our Tianwen-1 mission are made of this material.

Common Materials for Lispring Wave Springs:

.High Carbon Steel
65Mn: Commonly used grade in China
SAE1070-1090: American grade
.Stainless Steel
SUS631: Japanese standard designation
17-7PH: American standard designation
07Cr17Ni7Al: Chinese standard designation, a type of precipitation hardening stainless steel. Its strength can be enhanced through aging treatment, making it the preferred material for wave springs due to this characteristic.
.Special Alloy Materials
A-286 (GH2132): Iron-based alloy, resistant to high temperature and corrosion, with a maximum recommended temperature of 538°C and relatively high cost-effectiveness.
Inconel X-750 (GH4145): Nickel-based alloy containing 75% nickel, commonly used in acid-base environments, with a maximum recommended temperature of 538°C.
Inconel X718 (GH4169): Nickel-based alloy with strong corrosion resistance, a maximum recommended temperature of 704°C, and commonly used in high-temperature environments. The wave springs used in our Tianwen-1 mission are made of this material.

Manual Installation Method for Spiral Retaining Rings:
(Manual installation is used for single or low-volume production. For larger quantities, consider using automatic installation.)
Insert one end of the retaining ring into the groove by prying it open with your hand. Press and wind the ring around the circumference of the groove until the entire ring is in the groove.

Removal Method for Spiral Retaining Rings:
Insert a screwdriver or needle-nose pliers into the removal slot. Use the tool to pry up the end of the ring. Hold the ring with your hand and rotate it along the circumference until the ring is completely removed from the groove.

The raw materials we procure from suppliers can have different colors (see left image). After heat treatment, the color of the metal surface can change, resulting in various surface colors (see right image). Due to oxidation at high temperatures, the material surface can range in color from straw to blue, depending on the temperature and duration of the treatment. This color variation is caused by differences in the state of the oil on the material and the atmosphere inside the heat treatment furnace, which result in different colors of the oxide film on the product surface. This color difference does not affect the mechanical properties of the product.

 

TECHNOLOGICAL ISSUES

Yes, we always use high quality export packaging. We also use specialized hazard packing for dangerous goods and validated cold storage shippers for temperature sensitive items. Specialist packaging and non-standard packing requirements may incur an additional charge.

Yes, we have strong developing team. The products can be made according to your request.

Springs are mechanical components that utilize elasticity to function, offering a wide range of applications, diverse categories, and affordable unit prices. Despite their widespread demand, the demand is often scattered and varied. While spring units have relatively low value, the industry’s output and market size are still significant. Although it is a smaller sector within the manufacturing industry, springs are an essential component in many industrial production chains, playing a crucial role that cannot be overstated.

For a long time, the spring industry has formed an oversupply of low-grade ordinary springs, the passive situation of high-grade products in short supply.

According to expert statistics, China’s annual production volume of springs has reached 4 billion pieces, a total of 21 categories of various spring products, more than 1600 varieties, including wave springs for a high-precision flat wire compression springs, widely used in aerospace, precision machinery, hydraulic seals and high-end motors and many other industries and products, is one of the representatives of high-end springs.

Wave spring is a more complex space curved parts, the shape is special, requiring uniform distribution of peaks and valleys according to the circumference, so the design, materials, processing equipment have strict requirements.

Design, advanced manufacturers of wave springs will use simulation and other design software for finite element analysis, etc., to provide specific theoretical guidance for wave spring stamping and forming process experiments; production and processing, most companies will independently develop and design special press tooling or equipment, combined with CNC spring presses, CNC ringing machines and other automated equipment to improve product efficiency and product quality; materials, according to In terms of materials, according to the needs of customers in different application areas, choose suitable and high-performance materials, such as the aerospace industry, the need to choose nickel-based alloys and other high-strength, high-temperature-resistant special alloys to process and produce, and materials to meet RoHS and other environmental requirements to achieve green manufacturing and intelligent manufacturing.

One of the major advantages of wave springs over ordinary cylindrical compression springs is that the working height required with the same load is reduced by more than 50%. In order to meet the requirements, higher strength materials need to be used.

Wave springs are used in aerospace, precision machinery, hydraulic seals, and high-end motors where internal space is limited, and dimensional accuracy is critical. The increase in the limit deviation of the inner and outer diameters facilitates the installation and stability of the performance of wave springs.

The spin ratio, or spring index, of a wave spring affects the strength, stiffness, stability, and ease of manufacture of the spring. In order to make the spring itself more stable and not flutter and be too soft, the winding ratio should not be too large; however, in order to avoid strong bending of the spring wire during winding, the winding ratio should not be small.

The number of turns of the wave spring impacts the load deviation when the spring is compressed to a specified height, and the larger the number of turns, the smaller the deviation.

The coefficient of elasticity reflects the relationship between the load and the deformation of the wave spring and is an important characteristic for measuring the performance of the spring product. Wave springs are installed at moving structures and are prone to friction with their surroundings. The increase in stiffness helps to extend their service life.

The raw materials we procure from suppliers can have different colors (see left image). After heat treatment, the color of the metal surface can change, resulting in various surface colors (see right image). Due to oxidation at high temperatures, the material surface can range in color from straw to blue, depending on the temperature and duration of the treatment. This color variation is caused by differences in the state of the oil on the material and the atmosphere inside the heat treatment furnace, which result in different colors of the oxide film on the product surface. This color difference does not affect the mechanical properties of the product.

Payment inquiry

Shipping costs vary depending on the chosen method. Express delivery is the fastest option, but also the most expensive. For large quantities, sea freight is often the most cost-effective solution. To provide an accurate quote, we need to know the details of the shipment, including quantity, weight, and delivery destination. Please contact us for more information.

You can make the payment to our bank account, Western Union or PayPal:
30% deposit in advance, 70% balance against the copy of B/L.

Our prices are subject to change depending on supply and other market factors. We will send you an updated price list after your company contact us for further information.

DO YOU NEED SUPPORT ?

Every day we receive inquiries from customers about our company, our wave springs, our payment methods, etc. We have summarized frequently asked questions. If you don’t find an answer, please contact us.

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CONTACT DETAILS

Headquarter Zhejiang, China
Location No. 14 High-tech Industrial Park, Lingang Economic Development Zone, Yueqing Bay, Yueqing City, Zhejiang Province,China
Phone +86-577-62607078
Sales marketing@lispring.com