Coaster-Style Driver Door Frame (Left-Hand Drive)

The Jingma Coaster-Style Driver Door Frame (Left-Hand Drive) is a critical structural exterior component designed for Coaster-type and mid-size passenger buses. Manufactured from high-quality cold-rolled steel sheets, this door frame is engineered to meet industry standards and customer requirements for strength, precision, and durability.

The inner panel, outer panel, and reinforcement parts are formed through precision stamping molds and processed with 3D laser cutting based on technical drawings. These components are then integrally welded to form a robust frame structure, ensuring dimensional accuracy, stable installation, and long-term structural reliability in demanding operating environments.

Product Features

• High Structural Integrity:
  The door frame is assembled by welding inner panels, outer panels, and reinforcement components into a single integrated structure, providing excellent rigidity and load-bearing capacity.

• Advanced Anti-Corrosion Performance:
  Both internal and external surfaces undergo electrophoretic coating treatment. The product passes 72+ hours of salt spray testing, significantly enhancing rust resistance and extending service life while offering a reliable base for subsequent painting processes.

• Precision Manufacturing:
  Mold stamping combined with 3D laser cutting ensures accurate dimensions, consistent quality, and smooth edges, enabling precise vehicle body fitment.

Quality Standards

• Key Process Capability Index: Stable and controlled

• Customer Satisfaction Rate: ≥ 95%, with an annual increase of 1%

• Process Audit Level: Grade B

• Inspection Pass Rate: ≥ 98% per batch

These indicators ensure consistent quality, high reliability, and compliance with automotive manufacturing standards.

Application Range

This driver door frame is suitable for Jiangling Jingma Coaster bus models with the following lengths:

• 6.0 meters

• 7.1 meters

• 7.7 meters

It is widely used in city commuter buses, tourist coaches, and school bus manufacturing and replacement projects.

Notes & Handling Instructions

• Customers are required to confirm the product condition before shipment.

• Avoid heavy pressure during transportation to prevent deformation.

• Packaging must be firm and secure to ensure safe delivery.

Competitive Advantages

• Factory-Direct Supply: Direct manufacturer sales with true ex-factory pricing

• Reliable Partnerships: Long-term cooperation with leading domestic bus manufacturers such as Xiamen King Long, Ankai Bus, and Jiangling Jingma

• Quality & Delivery Assurance: Mature production systems ensure stable quality and on-time delivery

Conclusion

The Jingma Coaster-Style Driver Door Frame (Left-Hand Drive) offers a durable and precision-engineered solution for bus manufacturers and aftermarket customers. With cold-rolled steel construction, advanced electrophoretic anti-corrosion treatment, and strict quality control standards, the product ensures excellent structural strength, corrosion resistance, and compatibility. Backed by factory-direct supply and proven cooperation with well-known bus brands, it is a dependable choice for high-quality Coaster bus body components.