BAOKUN Global Project Success Stories

A fastener manufacturer in Brazil required precision seamless tubes made from DIN EN 10305-1 cold-drawn tubing for motorcycle rear swingarm pivot bushings. The customer focused on dimensional tolerances, manufacturing processes, and mechanical performance. Due to unclear drawing details, our team provided similar product references to confirm the machining process and finished-part requirements. To verify performance, we produced samples and conducted tensile strength and hardness testing. The results fully met the customer's specifications, helping us move confidently from product validation to mass production.

A gas spring manufacturer in Russia required precision steel tubes and chrome-plated shafts with tight dimensional tolerances and a surface roughness of Ra ≤ 0.4 μm. The products were used in gas springs for automotive hoods, tailgates, adjustable desks, chairs, and cabinet doors. Because the customer planned to inspect the products before payment, consistent quality was essential. Through strict process control and comprehensive inspections, we ensured all tolerance and surface finish requirements were achieved, resulting in a successful order and long-term cooperation.

A honed tube manufacturer in South Africa was searching for pre-honed tubes with strict requirements for inner diameter, outer diameter, straightness, and dimensional tolerances. The customer preferred stock or near-size materials to reduce lead times and costs but was concerned about machining performance. We supplied samples for trial production, allowing the customer to verify processing results before purchasing. After successful testing confirmed compliance with all specifications, the customer proceeded with a bulk order.

A distributor in Brazil required SAE 4140 induction hardened chrome plated rods ranging from 12 mm to 50 mm for automotive steering, suspension, and braking systems. The customer paid close attention to chemical composition, mechanical properties, and salt spray resistance. To demonstrate product quality, we arranged a factory audit, explained the production process, and conducted third-party testing. All rods underwent pre-shipment inspection and were packed with protective paper tubes and wooden crates to prevent transportation damage, ensuring reliable product performance upon delivery.

A mechanical parts manufacturer in Vietnam was sourcing DIN 2391 / EN 10305-1 precision steel tubes for automotive component machining. The customer focused on product specifications and pricing but required sample validation before placing an order. To support the evaluation process, we prepared multiple free samples in the required dimensions, with the customer only covering freight costs. After independent testing confirmed compliance with all technical requirements, the customer proceeded with a formal order, establishing a successful partnership based on product quality and responsive service.

An Australian manufacturer serving the defense, mining, autonomous vehicle, and automotive sectors required E355+SR SRB precision tubes manufactured to EN 10305-1 and EN 10305-2 standards for high-performance shock absorbers. The customer required exceptional dimensional accuracy and material consistency. Following several rounds of technical discussions, drawing revisions, and process optimization, we developed a solution that met the required tolerances. Every sample was fully inspected using dedicated gauges before delivery. The samples successfully passed validation testing, leading to the customer’s first production order.

A hydraulic components distributor in Mongolia was sourcing NBK phosphated J524 hydraulic tubes for construction machinery hydraulic systems. The customer focused on material quality, dimensional accuracy, surface treatment, and delivery consistency. Having experienced repeated quality issues with previous suppliers, the customer was cautious about establishing a new partnership. We provided local customer references and invited the customer to review our manufacturing and quality control processes. After a successful trial order and inspection approval, the customer expanded cooperation by adding E470 high-strength tube requirements and planning future orders.