Import 30203 Taper Roller Wheel Bearings — Buy in wholesale FOB from Supplier in China

The 30203 is a single-row tapered roller bearing with a 17 mm bore, 40 mm outer diameter and 12 mm overall width. It consists of a separable cone (inner ring with roller assembly) and cup (outer ring), enabling independent mounting and field service. Basic dynamic load rating is 19,000 N and basic static load rating is 18,600 N, with limiting speeds of 8,500 rpm with grease lubrication and 12,000 rpm with oil lubrication. The bearing is made from Chrome Steel (AISI 52100 / GCr15) with case-hardened steel options for enhanced fatigue resistance in wheel hub and gearbox applications.

Tapered roller bearings of this size class are produced to ISO 355 / DIN 720 dimensional standards, with a contact angle geometry that directs axial and radial loads to opposing raceways. The 30203 series uses a pressed steel cage as standard, though machined brass or polymer cages are available for specific duty cycles. Case-hardened variants provide a hard wear surface with a tough core, suiting them to shock-load conditions in automotive and agricultural drivetrains. Typical operating temperature range for standard Chrome Steel is -30 degrees C to +120 degrees C, with reduced ratings above 150 degrees C.

Primary applications include automotive wheel hubs, light vehicle transmissions, differential pinions, and general industrial gearboxes where combined loads occur. The 30203 is also specified for conveyor rollers, electric motors, and agricultural machinery spindles. Buyers should confirm with Hebei Heng Tai Rui Xin Bearing Corp. the specific steel grade, cage material, and whether bearings are supplied as matched cone-cup sets or individual components. HS Code 8482.20 applies for tapered roller bearings in international trade.

Hebei Heng Tai Rui Xin Bearing Corp., Ltd. is located in Linxi City, Xingtai, Hebei Province, with the address Sunshine Park, postal code 054900. The company is classified as an imported-tier supplier with a harbor trust tier. The listing shows a response rate of 0.00 percent and an average response time of zero hours, which indicates no response data is available from the platform. No factory size, year of founding, revenue, employee count, or client list is stated in the source profile.

The supplier lists 30203 tapered roller bearings among its product range, with emphasis on Chrome Steel and case-hardened steel material options. Buyers should note that the profile does not disclose ISO certification status, internal quality control protocols, or export experience to specific markets. Direct enquiry to Hebei Heng Tai Rui Xin Bearing Corp. is recommended to verify production capacity, sample availability, and whether bearings are manufactured in-house or sourced from partner factories. The Linxi area of Hebei Province has a concentration of bearing manufacturing, which provides regional industry context.