INA RNA4900-RSR-XL needle roller bearing

INA RNA4900-RSR-XL belongs to needle roller bearing, part of our Bearings range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for RNA4900-RSR-XL and any equivalents.

The RNA-RSR-XL from INA is a radial needle roller bearing that runs without an inner ring and comes with a needle cage plus a contact seal. The shaft itself acts as the raceway, so it has to be ground and hardened, which is how the assembly keeps its radial section and weight down. Maintenance and purchasing teams turn to this design when the mounting space is tight but the load in a small diameter still has to be carried.

The code breaks into three blocks. RNA tells you there is no inner ring; the digits that come after it, as in RNA4900-RSR-XL or RNA4905-RSR-XL, set the size and the dimension series. RSR means both sides carry a contact seal, which holds the lubricant in and keeps contaminants out. XL marks the current generation in the INA catalogue. Read the blocks in that order and the code on the box matches the one on the drawing.

You will find these bearings in places where radial room is scarce: gearboxes, pumps, compressors, textile machines, packaging lines and compact transmissions. They also show up in production line maintenance, road equipment, agricultural machinery and power transmission assemblies. With no inner ring in the bearing, the shaft has to meet the hardness and roughness the raceway demands, so this variant suits designs where the shaft is already finished for that job.

Selection starts with the shaft. Check that it is ground and hard enough to serve as a raceway. The RSR contact seal needs a sound support surface on the shaft, otherwise the sealing lip can be damaged. Use the lubricant called for by the operating temperature and speed; the seal helps keep it in place but is not a substitute for a lubrication plan. Keep alignment in check during mounting and avoid striking the seal edges. If the shaft is not prepared, look at a version with an inner ring instead.

Sealed needle roller bearings are sold under different nomenclatures, and series with sealing and generation suffixes may have equivalents in other brands. Dimensions and tolerances, however, do not always line up. Do not swap on code similarity alone: compare diameter, width and seal type against the technical data sheet. When in doubt, the complete code from the bearing or the equipment drawing is the safest reference.

For an INA needle roller bearing from the RNA-RSR-XL series, send the exact code or the machine model on WhatsApp. Our team replies promptly with the quote and the technical information needed to confirm the variant, and can also help identify the replacement if you provide the housing and shaft dimensions.