Import Bearing — Buy in Bulk from Supplier in China

Zhengkai Carbide Ltd., founded by Mr. Xu Zhengkai and based at No 23 Jin Sha Road, Fenghua, Zhejiang, China, markets precision bearings for automotive, industrial machinery, and robotics applications. The source description emphasises reduced friction and enhanced durability, though it supplies no specific dynamic load ratings, bore dimensions, or speed limits. Buyers should request the exact bearing designation, boundary dimensions, and basic dynamic load coefficient C to verify suitability for their shaft and housing assemblies.

Material selection centres on high-grade alloy steel, which in this product category typically means vacuum-degassed bearing steel such as 100Cr6 (AISI 52100) or Chinese GCr15 equivalent, heat treated to a standard 60-65 HRC. The emphasis on precision engineering suggests P5 or P6 dimensional tolerance class, common for robotics and spindle applications where runout control matters. Surface finish, raceway waviness, and ball or roller grade are not detailed in the source; these parameters directly influence vibration and service life in high-speed rotation.

The bearings target robotics integrators, automotive tier suppliers, and industrial machinery rebuilders. Custom sizes are mentioned, which implies the supplier either holds adaptable tooling or offers design-to-order services. FOB and CIF shipping terms are referenced, with L/C and T/T payment options. Response metrics show zero activity, so direct telephonic or on-site contact through the Fenghua address is prudent before finalising terms. Zhejiang Province hosts a dense network of precision component manufacturers, offering potential for factory visits if volume justifies travel.

Zhengkai Carbide Ltd. is situated at No 23 Jin Sha Road, Fenghua, Zhejiang Province, postcode 315500, China. The firm is classified as 'imported' tier with a 'harbor' trust rating. Response rate and average response hours are both recorded at zero, indicating no tracked enquiry history. The company name references carbide materials, which may reflect a broader product portfolio or historical specialisation in tungsten carbide tooling rather than solely steel bearings. Mr. Xu Zhengkai is named as founder, though no founding year, registered capital, or ownership structure is provided.

The listing omits factory size, employee count, production capacity, export licence details, quality certifications, and major client references. No information on whether production is in-house or subcontracted appears. Buyers should request a business licence, ISO 9001 certificate, and any relevant automotive or aerospace supplier approvals. Given the carbide company name, clarify whether bearing production is a core activity or a recent extension, as this affects technical support depth and manufacturing consistency. A factory visit to Fenghua, near Ningbo, is feasible and advisable for first-time orders above modest value.