NTN 7309B angular contact ball bearing

NTN 7309B is a reference of angular contact ball bearing, within Bearings. Request a quote for 7309B via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.

The NTN B series angular contact ball bearing is a single row bearing with offset raceways, designed to withstand combined radial and axial loads in one direction. It is used where rotation precision and axial rigidity are decisive: spindles, pumps, gearboxes and transmission equipment. MR Accesorios Industriales sells the NTN line in Buenos Aires, Argentina, and quotes the exact part number you need on WhatsApp.

The B series designation is read from the size number and the suffix that accompanies it. In the examples 7200B, 7201B, 7202B, 7203B, 7204B, 7205B, 7206B and 7207B, the initial number identifies the dimensional series and the following digit the bore size; the final letter B indicates the contact angle of the series. This code defines the part unambiguously, so send us the one shown on the drawing or on the old bearing.

These bearings appear in machine tool spindles, centrifugal pumps, compressors, gearboxes and transmission cases, and in process equipment in the food, chemical and metalworking industries. In Argentina they are also found in industrial fans and in assemblies where axial thrust must be absorbed in addition to radial load. When the equipment works with load in one direction, the B series is the single row option; if the thrust goes in both directions, they are mounted in pairs.

For selection and mounting, internal clearance, sealing and lubrication must be taken into account. The B series is usually open, so sealing is handled with radial shaft seals or labyrinths in the housing. Mounting requires careful alignment and controlled preload: uneven tightening or a misaligned seat shortens bearing life. Lubrication can be grease or oil depending on speed and working temperature, and axial clearance should be checked before starting up the equipment.

Equivalences between brands are handled by the dimensional code and the contact angle: the same size may appear with different suffix letters depending on the manufacturer, and they are not always interchangeable without verifying the angle and clearance. If you bring an unidentified part or another brand's code, at MR Accesorios Industriales we indicate the equivalent NTN reference and quote it for you. Interchangeability is always confirmed against the drawing and the equipment's load conditions.

If you need an NTN B series angular contact bearing, send the part number by WhatsApp to MR Accesorios Industriales and we will quote it promptly. We handle inquiries from workshops, plants and maintenance teams in Buenos Aires, Argentina and throughout the country, and we help you define the correct variant for the assembly. Since 1945, we support the technical purchase with the advice the equipment needs.