Import Du Steel Plate Oilless Bearing — Buy in Bulk from Supplier in China

The DU steel plate oilless bearing from Jiashan Caoshi Oilless Bearing Factory is a composite bearing designed for maintenance-free operation under high load and low speed conditions. It features a steel backing with a sintered bronze layer and a PTFE-based liner, typically conforming to the SF-1 or SF-2 standard. The bearing operates without external lubrication by transferring a thin film of PTFE to the mating surface during motion, reducing friction and wear. Exact dimensions from the listing are not provided, but standard sizes range from 10mm to 100mm bore diameter with thicknesses between 2mm and 10mm.

The bearing material composition follows industry-standard Du-type designs, where SF-1 is used for general self-lubricating applications and SF-2 for boundary lubrication under heavier loads. These are common in machinery where oil or grease cannot be maintained, such as in dusty, high-temperature, or sealed environments. The steel backing provides structural integrity, while the bronze layer enhances thermal conductivity and adhesion to the PTFE liner. Typical operating temperatures range from -195°C to +280°C, and the maximum PV value is generally 3.6 N/mm²·m/s for SF-1.

These bearings are commonly purchased by manufacturers in mining, construction equipment, agricultural machinery, and hydraulic systems where reliability and reduced downtime are critical. Buyers often source them for replacement parts in existing machinery or for integration into new designs requiring low-friction, maintenance-free joints. Trade terms are not specified in the listing, but standard packaging is in anti-rust paper with bulk cartons or wooden crates. Lead time and minimum order quantities must be confirmed directly with the supplier.

Jiashan Caoshi Oilless Bearing Factory is located in Jiasha County, Zhejiang Province, China, with a physical address on Jiefang Road. The supplier is identified as an imported tier with harbor trust status, indicating verification of business registration and export capability. No details are provided regarding years in operation, workforce size, production capacity, or client list. The listing confirms the factory produces DU-type oilless bearings but does not state certifications, testing protocols, or quality control systems.

The supplier’s profile does not indicate ISO certification, laboratory testing, or in-house R&D. Response rate and average response time are not available, suggesting limited communication infrastructure or low engagement on the platform. Buyers should treat this supplier as a manufacturer of standard industrial bearings without additional claims of innovation or premium quality. Verification of production capability and sample testing is recommended before placing bulk orders.