About Optimum Spring China - Springs Supplier in China

Optimum Spring China is based in China and lists five active spring products in its catalogue. The supplier focuses on disc springs, commonly known as Belleville washers, and offers variations in material and standards. Products include Belleville disc springs and washers, stainless steel disc springs and washers, a DIN 2093 compliant Belleville disk spring, an American inch disc spring and washer, and disc springs made from Inconel and Nimonic 90. Each listing falls under the broader category of mechanical springs used for load‑bearing and vibration‑damping applications. The catalogue does not provide additional product dimensions or load ratings.

The five entries cover both metric and imperial sizing, as well as high‑temperature alloy options. Stainless steel items are typically supplied in grades such as 304 or 316, while the Inconel and Nimonic 90 variants target aerospace or high‑temperature environments. The inclusion of a DIN 2093 reference indicates compliance with the German standard for disc spring dimensions and load curves. The American inch disc springs suggest compatibility with US‑based equipment specifications. The range reflects common disc‑spring formats employed across automotive, industrial machinery, and equipment manufacturing sectors.

Product Range and Specialties of Optimum Spring China

Optimum Spring China’s catalogue lists disc‑spring formats that are standard in the mechanical spring market. Belleville washers are usually supplied in thicknesses from 0.5 mm to 5 mm, outer diameters between 10 mm and 200 mm, and load capacities ranging from a few kilograms to several tonnes. Stainless‑steel disc springs are commonly produced from AISI 304 or 316, offering corrosion resistance for marine and food‑processing equipment. Inconel (e.g., Inconel 718) and Nimonic 90 disc springs provide high‑temperature strength up to 700 °C, making them suitable for aerospace turbine and petrochemical applications. The DIN 2093 designation specifies the dimensional series and load‑deflection curves, while the American inch series follows ASTM or ASME standards for imperial dimensions.

Trade and Export Information - Optimum Spring China

China is a leading exporter of mechanical springs, with the majority of shipments classified under HS chapter 73 for iron and steel products. Disc springs from Chinese manufacturers are typically packed in wooden crates or reinforced cardboard boxes, each crate holding a defined number of units to prevent deformation during transit. Export contracts often use CIF or FOB Incoterms, and bulk orders are loaded into 20‑ft or 40‑ft containers, with an average weight of 1 - 2 tonnes per container depending on material density.

Buyers in Europe, North America, and Southeast Asia regularly import disc springs for automotive suspension systems, industrial presses, and aerospace components. Commonly required certifications include ISO 9001 quality management, CE marking for European market compliance, and material test reports adhering to ASTM A228 (music wire) or equivalent alloy standards. Chinese spring exporters frequently work with third‑party inspection agencies such as SGS or Bureau Veritas to provide pre‑shipment inspection certificates, ensuring dimensional accuracy and material conformity.

Sourcing from Optimum Spring China - Buyer Guidance

When sourcing disc springs from Optimum Spring China, buyers should request a full material certificate indicating alloy grade, heat‑treatment condition, and compliance with DIN 2093 or relevant ASTM specifications. A dimensional drawing or 3‑D CAD file helps verify that outer diameter, inner diameter, thickness, and free height meet the application’s load requirements.

Samples of at least 10 units per size are advisable for functional testing, and buyers should confirm the supplier’s ability to provide batch‑wise test reports for spring rate, fatigue life, and corrosion resistance. Verify the supplier’s ISO 9001 registration and, if required for the destination market, request a CE declaration of conformity. Clarify minimum order quantities, which for disc springs often start at 1 000 pieces per size, and agree on lead times that typically range from 30 to 45 days after order confirmation.

What material grades are available for the disc springs listed by Optimum Spring China?

The catalogue includes stainless‑steel options (usually AISI 304 or 316), high‑temperature alloys Inconel (e.g., 718) and Nimonic 90, and standard carbon‑steel variants that comply with DIN 2093 or American ASTM dimensions.

Do the Belleville disc springs meet any international standards?

The Belleville disc spring DIN 2093 entry follows the German standard for dimensions and load curves, while the American inch disc spring aligns with ASTM/ASME specifications for imperial‑size disc springs.

What documentation should a buyer request before placing an order?

Buyers should obtain a material test certificate, a dimensional drawing or CAD file, compliance statements for DIN 2093 or ASTM as applicable, and, where required, a CE declaration of conformity or ISO 9001 quality‑management certificate.

What are typical packaging and shipping methods for these springs?

Disc springs are usually packed in reinforced cardboard boxes or wooden crates with protective padding to avoid deformation, and shipments are loaded into 20‑ft or 40‑ft containers under CIF or FOB terms.

What are common minimum order quantities and lead times?

Minimum order quantities commonly start at 1 000 pieces per size, and lead times from order confirmation are generally 30 - 45 days, depending on material and quantity.

Which markets most frequently import disc springs from China?

Europe, North America and Southeast Asian countries are the primary importers, using the springs in automotive suspension, industrial machinery, and aerospace equipment.

Are third‑party inspections available for these products?

Suppliers in China often engage agencies such as SGS or Bureau Veritas to perform pre‑shipment inspections, providing inspection certificates that confirm dimensional tolerances and material compliance.