Import Constant Force Spring — Buy in wholesale FOB from Supplier in China

The constant force spring offered by Xian XZQ Spring Products Co., Ltd. is manufactured in China to a range of wire diameters from 0.15 mm up to 50 mm. The supplier lists material choices that include carbon steel (SWC), cold‑rolled steel, stainless steel (SUS), beryllium copper, phosphor copper, brass, music wire (SWP), 60Si2Mn and 55CrSi. Surface finishes can be applied such as blacking, zinc, nickel, chrome, silver, gold plating or powder coating. The product can be supplied in inner plastic bags and outer cartons or wooden cases according to customer request.

Carbon steel and stainless steel are the most common base materials for constant force springs because of their predictable elastic behaviour. In the spring industry, cold‑rolled steel is often selected for moderate loads, while beryllium copper provides superior corrosion resistance for marine environments. Typical surface treatments such as zinc or nickel plating add a protective barrier that extends service life under cyclic loading. The supplied wire diameter range allows designers to achieve force outputs from a few newtons to several hundred newtons, matching standard design tables.

These springs are frequently used in medical devices, automotive seat‑adjustment mechanisms and consumer‑goods retractors where a steady pulling force is required. Xian XZQ Spring Products Co., Ltd. can produce the part to a customer drawing and will pack the finished coils in plastic bags within cartons or wooden crates as specified. Buyers should confirm minimum order quantities, lead times and preferred Incoterms directly with the supplier before placing an order.

Xian XZQ Spring Products Co., Ltd. is located in the Heping Industrial Area of Xi’an, Shaanxi province, China. The company is listed with a harbour trust tier, indicating that it has passed basic verification checks, although the public response rate is recorded as zero and no average response time is available, so buyers should anticipate the need for proactive communication.

The supplier produces a broad catalogue of springs including compression, extension, torsion, disc and wire springs, and it emphasizes the ability to fabricate items from detailed drawings or samples. Packaging options are flexible, ranging from individual plastic bags to bulk cartons or wooden crates, and the company states that it can meet special customer requirements, but specific order minimums and lead times must be confirmed directly with the supplier.