Import 6210 2rs/Zz/Open Bearing — Buy in wholesale FOB from Supplier in China

The 6210 deep groove ball bearing from Ningbo Renhe Machinery Bearing Co., Ltd. is a standard single-row radial bearing with a 50mm bore diameter, 90mm outer diameter, and 20mm width. The bearing is stocked in three closure configurations: 2RS (rubber contact seals on both sides), ZZ (metal shields on both sides), and fully open. The supplier sources raw materials through controlled procurement channels and subjects all bearings to 100% fully automated inspection, with monthly output stated at 11 million sets and 48-hour delivery capability from stock.

The bearing rings and balls are produced from Chrome Steel GCr15, a standard carbon chromium through-hardening steel with typical composition of approximately 1% carbon and 1.5% chromium. Heat treatment runs across four dedicated lines, which is typical for volume bearing manufacturers seeking consistent hardness and dimensional stability. The EMQ (Electric Motor Quality) grade indicates tighter tolerances, lower noise, and reduced vibration levels compared to standard commercial bearings. Ningbo Renhe maintains an IATF16949 certificate, which is the automotive sector quality standard and signals process discipline rather than claiming universal superiority.

Primary applications include electric motors, gearboxes, conveyor systems, and agricultural machinery, where the bearing must tolerate moderate radial loads with occasional axial load components. The 2RS variant suits dusty or moist environments, the ZZ variant suits cleaner spaces where some grease exchange is acceptable, and the open variant suits shielded housings with external sealing. Buyers should confirm the exact cage material, lubricant type, and operating temperature range directly with the supplier, as these details are not stated in the listing. The supplier offers a one-year warranty with free replacement for defective units.

Ningbo Renhe Machinery Bearing Co., Ltd. operates from No.218, Weier Road, Andong Town Industrial Zone, Cixi, Zhejiang Province, China, postal code 315327. The supplier holds a harbor trust tier and reports a zero percent response rate with zero average response hours, which buyers should interpret as no reliable responsiveness data being available rather than active unreliability. The company sources and controls all raw materials directly, maintains four heat treatment lines, runs automatic production, and cites an IATF16949 certificate. The listing emphasises 5S management and professional after-sales support, though no specific client references or export history volumes are provided.

What the profile does not state is as telling as what it does: no year of establishment, no employee count, no registered capital, and no named OEM or end-user customers. The 30,000-hour maintenance-free motor bearing claim appears in the source text but lacks accompanying test standard or application condition qualifiers. Buyers should treat this as a marketing statement requiring verification rather than a guaranteed specification. The harbour trust tier indicates basic verification; it does not substitute for buyer-conducted due diligence on financial standing or production capacity.