Import Bearing — Buy in wholesale FOB from Supplier in China

HK series drawn cup needle roller bearings from Watcs are precision-engineered components manufactured from bearing steel GCr15, also known as chrome steel SAE 52100. These bearings utilise a pressed steel outer ring with needle rollers retained internally, achieving substantial radial load capacity within an axially compact envelope. The HK series designation follows ISO 3245 dimensional standards for drawn cup needle roller bearings with open ends. Watcs offers sample units for pre-bulk quality verification, a practice that reduces procurement risk for buyers evaluating fit and performance in target applications.

The GCr15 / SAE 52100 chrome steel composition provides a hardened martensitic microstructure with typical hardness of 60-64 HRC after heat treatment, delivering wear resistance and fatigue life standard for automotive transmission and gearbox applications. The drawn cup manufacturing process produces a thin-walled outer ring through precision pressing of steel strip, with typical wall thickness ranging from 0.65mm to 2.0mm depending on bore size. Needle roller diameters typically fall between 2mm and 9mm for standard HK series, with roller crowning to reduce edge stressing. Cage materials are typically steel or plastic (PA66), with plastic cages offering reduced friction and weight at moderate speeds. Lubrication grooves and holes may be present on the outer ring for grease replenishment in some variants.

Primary applications span automotive manual transmissions, torque converters, and gearbox layshafts; industrial gearboxes and speed reducers; and agricultural machinery power take-off units. OEM manufacturers and aftermarket replacement distributors represent the core buyer segments. Watcs, located in Qingdao, Shandong Province, operates from a commercial address suggesting trading or representative office functions rather than direct manufacturing. The supplier's response rate and average response time indicate limited communication history, so buyers should confirm technical documentation availability and sample dispatch timelines directly.

Watcs is located at 20f, Zijin Square, Jinggangshan Road, Qingdao 266555, in Shandong Province, China. The address format, with a specific floor in a commercial building, indicates a trading company or sales office rather than a manufacturing facility. The supplier carries an imported tier designation and harbour trust tier, with no verification beyond basic registration. The response rate of 0.00% and zero recorded average response hours suggest minimal historical buyer engagement through the platform, making direct outreach essential for any serious procurement discussion.

The listing provides limited company-level information beyond the address and product focus on HK series needle roller bearings. No manufacturing certifications, production capacity figures, export experience, or client references are stated. Buyers should independently verify Watcs's supply chain relationships, whether they source from certified bearing manufacturers in Shandong or neighbouring Jiangsu and Zhejiang provinces, and their quality control procedures for incoming inspection and outgoing certification. The custom specification mentions sample availability, which buyers should use to assess dimensional accuracy, surface finish, and load capacity against application requirements before committing to volume orders.