Sunchain provides a clear and transparent after-sales service mechanism. For Transit Damage: If packaging or product damage occurs during ocean freight, customers can take photos to document it upon receipt and notify Sunchain. We will assist in verifying the cause and provide solutions, such as product replacement, spare parts, or reasonable compensation. For Product Warranty: Sunchain guarantees that products will be free from material and manufacturing defects for 12 months from the date of shipment, provided they are used normally (with recommended cleaning and re-lubrication every six months). Within the warranty period, we offer repair, replacement, or a refund based on the actual situation to minimize your procurement risks.

You do not need to follow up on orders via frequent phone calls. We can provide real-time work order progress, production status (Normal / Paused / Abnormal), and estimated completion time through our system. If necessary, we can also establish a regular automated reporting mechanism, allowing you to track order status in a much more intuitive manner.

Standard products carry a minimum MOQ, while custom products are evaluated based on specifications and tooling conditions. However, Sunchain possesses flexible manufacturing capabilities. For standard ultra-heavy-duty slides, such as the TUMA series UB752 (500kg class), there is usually no rigid MOQ restriction; we can accommodate small-batch demands or single-piece sample orders. For customized hardware, the MOQ depends on design complexity and tooling requirements, but we always offer flexible solutions to help customers mitigate development and procurement risks. This model is ideal for project-based procurement in industrial equipment, specialty vehicles, and heavy tool cabinets.

For HMLV demands, we balance costs and lead times through three key methods: Modular Mold Design (reducing customization costs), MES Schedule Optimization (minimizing changeover times), and Advance Raw Material Staging (maintaining a 2–3 month safety stock). This allows us to maintain reasonable customization costs without sacrificing lead times.

Our one-stop advantage stems primarily from internal integration and rapid prototyping capabilities: Mold design and processing are completed in-house (equipped with wire EDM machines), and new product prototyping can be completed within 2–3 days (compared to over a week externally). Furthermore, the MES system integrates work orders and drawings to prevent version errors. This allows customers to rapidly validate designs during the initial product development stage, significantly shortening the time from design to mass production.

Sunchain's MES smart manufacturing system enables digital management and process traceability for the entire production workflow. Through the MES system, every batch of products logs production batches, process parameters, inspection records, and shipping information. Consequently, full process traceability is achieved. For specific collaborative projects, Sunchain can also provide remote quality acceptance or share process information upon request. Furthermore, the factory has introduced 3D AOI equipment to inspect the machining quality and dimensional consistency of critical parts, minimizing manual inspection errors.

For industrial and equipment manufacturing customers, long-term quality consistency is paramount. Sunchain mitigates quality risks through three layers: (1) MES Process Management: Real-time monitoring of the production process and retention of complete production records ensure that every batch meets the same standard. (2) 3D AOI Automated Inspection: Utilizing Automated Optical Inspection equipment to inspect critical components, reducing human error. (3) Pre-shipment Quality Inspection: All products undergo rigorous quality inspection and testing prior to shipment. Our Golden Sample + Routing Inspection mechanism further eliminates human error and guarantees consistent quality across batches.

Beyond smoothness, we offer comprehensive solutions for surface treatment and corrosion resistance: Zinc Plating (Standard rust prevention), Black Zinc (Balance of aesthetics and corrosion resistance), Yellow Zinc (Higher corrosion protection grade), and E-coating / Electrophoretic Deposition (High uniformity and premium aesthetic texture). All surface treatments pass at least a 48-hour salt spray test. For outdoor, high-humidity, or high-salinity environments, we can upgrade specifications or use stainless steel materials upon request.

Our slide testing is executed in accordance with ANSI/BIFMA standards and can be cross-referenced to DIN or other specifications based on customer requirements. Before shipment, the following tests are conducted to ensure high-load safety: Cycle Life Testing (typically 50,000+ cycles), Outstop Impact Testing (approx. 15,000 cycles), Side Load Testing (simulating off-center loads), and Anti-tipping/Structural Stability Testing. For heavy-duty applications (such as the 500kg class), we conduct additional safety factor verifications and structural evaluations to ensure stability and safety under long-term use and dynamic loads.

The essence of how TUMA ultra-heavy-duty slides ensure a smooth, effortless user experience while boosting load capacity lies in three key factors:

1. Premium Materials: We use S55C high-grade steel. The higher the rigidity of the steel, the less the slide deforms under high-load conditions.

2. Strict Deflection Control: We ensure that when the ultra-heavy-duty slide is fully extended under its rated load, the front-end deflection does not exceed 2% of its retracted length. For example, for a 500mm slide under maximum load, the front-end deflection will not exceed 10mm.

3. Optimized Ball Track: The surface roughness of our steel ball tracks is minimized. Higher surface roughness increases the force required to push or pull the slide and generates more noise.