Import Bearing — Buy in wholesale FOB from Supplier in China

The MR63ZZ (673ZZ) miniature deep groove ball bearing from Fuzhou Qiangsheng Bearing Co., Ltd. measures 3 mm bore, 6 mm outer diameter, and 2.5 mm width. It is manufactured in chrome steel Gcr15 (AISI52100), stainless steel 9Cr18 (AISI440), or ceramic hybrid material configurations. Precision grades span ABEC-1, ABEC-3, and ABEC-5 tolerances, with shielded closures to protect against contamination. These specifications place the bearing in the ultra-miniature class, where dimensional consistency at sub-millimetre tolerances governs rotational performance and service life.

Chrome steel Gcr15 offers standard hardness and wear resistance for general industrial duty, while 9Cr18 stainless steel provides enhanced corrosion resistance for humid or chemically exposed environments. Ceramic hybrid variants reduce mass and thermal expansion, suiting high-speed spindles and temperature-sensitive instrumentation. The ABEC rating system defines dimensional and running accuracy: ABEC-1 suits general applications, ABEC-3 improves concentricity for moderate speeds, and ABEC-5 meets demands of precision instruments and miniature robotics. Shielded closures (ZZ designation) retain lubricant and exclude coarse particulates, though they do not seal against fine dust or liquid ingress.

Typical applications include small DC motors, dental handpieces, surgical robots, optical encoders, and laboratory centrifuges where space is constrained and reliability is critical. Buyers in medical device, automation, and consumer electronics sectors commonly source this format. When negotiating, buyers should confirm the specific ABEC grade required for their application, as price and lead time vary considerably between grades. Fuzhou Qiangsheng Bearing Co., Ltd. is located in Fuzhou, Fujian Province, with manufacturing access to China's precision machining supply chain. The supplier lists a trust tier of harbor with no recorded response data, so direct enquiry is essential to confirm current availability and minimum order quantities.

Fuzhou Qiangsheng Bearing Co., Ltd. is headquartered at Block 5#b, Gulou Yuan, Jingshan Pushang Industrial Zone, Fuzhou, Fujian Province, China, postal code 350008. The supplier holds a harbor trust tier on the platform, with a recorded response rate of 0.00 percent and zero average response hours, indicating no response history is logged rather than active engagement. This profile focuses on miniature and precision bearings, specifically marketing the MR63ZZ format with multiple material and precision configurations to international B2B buyers.

The listing does not disclose factory size, annual output, employee count, or specific export markets. No certifications such as ISO 9001 or IATF 16949 are mentioned in the available data. Buyers should therefore verify quality management credentials, inspection capabilities, and reference customers directly with the supplier. The product range is narrow and technical, suggesting specialisation rather than broad catalogue distribution. Given the absence of response data, initial contact via multiple channels (platform messaging, direct email, telephone) is advisable to assess communication reliability before committing to sample or trial orders.