Needle roller bearing NTN RNA4916R

NTN RNA4916R is a needle roller bearing reference, within Bearings. Request a quote for RNA4916R via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.

The NTN needle roller bearing of the RNA series is a radial bearing without an inner ring, designed to withstand high radial loads in very small radial spaces. It is mounted directly on a hardened and ground shaft, which simplifies the assembly and reduces weight. It is a common solution in transmissions, pumps, compressors and continuous production machinery where compact design is a priority. MR Accesorios Industriales sells this NTN line in Buenos Aires, Argentina, with more than 80 years of experience in bearings and power transmission.

The RNA series designation is read in blocks: the letters RNA indicate a needle roller bearing without an inner ring, the first number defines the dimension series (49 or 69) and the following number, together with the slash, identifies the diameter and width. The final suffix R indicates an execution with a stamped steel cage and guided needles. For example, RNA49/22R belongs to the 49 series with a shaft diameter of 22 mm, while RNA69/32R corresponds to the 69 series, of wider section, for the same diameter. The 49 series is the lightest section; the 69 offers greater radial load capacity.

These bearings are used in Argentine industries such as food, cement, steel and metalworking. They are found in gearboxes, water and oil pumps, air compressors, machine tools, conveyors and bottling equipment. Their low radial profile allows replacing bushings on shafts where space is critical, maintaining rotation precision. They are also common in the automotive sector and in the manufacture of agricultural machinery, where wear resistance and the ability to withstand radial loads are decisive.

To correctly select an RNA bearing, take into account the hardness and finish of the shaft: the raceway is ground directly on the shaft, with adequate surface hardness and fine roughness. Verify the alignment between the shaft and the housing, since these bearings are sensitive to misalignment. Lubrication can be grease or oil, depending on the working speed and temperature; in applications with contamination, evaluate external seals or bearings with seals. The internal radial clearance is adjusted according to the assembly and load conditions.

Regarding equivalents, needle roller bearings without an inner ring are identified by their designation and dimensions. Brands such as SKF, FAG, NSK or INA offer products with their own nomenclatures, but interchangeability is defined by the shaft diameter, outer diameter and width. If you have the code from another brand or an unidentified part, send us the data and we will indicate the equivalent NTN reference. We work with the catalogs of the manufacturers we sell.

To request a quote for your NTN RNA series needle roller bearing, write to us via WhatsApp with the complete code or the shaft and housing measurements. At MR Accesorios Industriales we respond promptly with the exact reference and the compatible alternative if you need it. We can also advise you on assembly and lubrication so that the part performs as expected.

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