Tapered roller bearing NTN 4T-749A/742

NTN 4T-749A/742 is a tapered roller bearing reference, within Bearings. Request a quote for 4T-749A/742 via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.

The NTN 4T series tapered roller bearing is a separable bearing made up of a cone (inner ring with rollers and cage) and a cup (outer ring). Its geometry of inclined rollers and raceways allows it to absorb radial and axial loads in one direction, so it is normally mounted in opposed pairs. It is used in gearboxes, wheel axles, spindles and equipment where there are combined loads.

The designation of these bearings combines the cone number with the cup number separated by a slash: for example, 4T-368A/362 indicates cone 368A and cup 362. The 4T prefix identifies the NTN series of metric and inch tapered rollers, and the A suffix indicates a design variant of the cone or the cup. In the examples 4T-745A/742 and 4T-749A/742 you can see that the same cup number can be combined with different cones, so the complete designation always defines the cone-cup pair.

In Argentine industry they appear in gearboxes, belt conveyors, mills, presses, road machinery and pumping equipment. They are also found in the agro-industrial sector, in seeders and harvesters, and in railway and port applications where there are combined loads and shocks. By working in pairs, they tolerate axial load well in both directions and allow controlled clearance adjustment during mounting.

To select the bearing you must define the shaft and housing diameter, the total width of the assembly and the type of load. Mounting is done with a fit on the cone and on the cup as applicable, and with the axial clearance adjusted with nuts, shims or covers. Lubrication can be grease or oil, and the sealing is chosen according to the environment: oil seals, labyrinths or covers. Alignment between cone and cup is critical because these bearings are not self-aligning.

Between brands, tapered roller series are interchanged by cone and cup number and by standardized dimensions, although each manufacturer may have variants of suffix, radius or contact angle. When the customer brings the part number of another brand or an unidentified part, at MR Accesorios Industriales we cross-reference it with the 4T series and tell you the compatible equivalent. If you need a specific size, send us the part number or the dimensions on WhatsApp and we will quote it shortly.

MR Accesorios Industriales sells NTN bearings in Buenos Aires, Argentina, with more than 80 years of experience in the field. If you are looking for a 4T series tapered roller bearing, write to us on WhatsApp with the cone and cup part number, or with the shaft and housing dimensions, and we will send you the quote.

This description provides guidance on the product type. Check the configuration and dimensions of this reference.