SKF RNU 203 TN9 cylindrical roller bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Cylindrical roller bearings
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Description
SKF RNU 203 TN9 belongs to cylindrical 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 RNU 203 TN9 and any equivalents.
The SKF RNU TN9 is a single row cylindrical roller bearing that uses a removable inner ring and an outer ring without flanges. This arrangement lets the shaft move axially, which suits equipment where thermal expansion must be absorbed without losing alignment. It is built for high radial loads and considerable speeds, and it is common in machine tools, pumps and gearboxes.
Reading the designation helps when you order a replacement. RNU identifies a cylindrical roller bearing with a separable inner ring and no flanges on the outer ring, so relative axial displacement is possible. The TN9 suffix points to a fiberglass reinforced polyamide cage intended for moderate temperatures. In a reference such as RNU 203 TN9, the 203 is the dimension series. Checking these codes against the old bearing avoids pulling the wrong part.
Typical service includes gearboxes, centrifugal pumps, compressors, industrial fans and machine tool spindles. The bearing handles heavy radial loads while staying rigid, which is useful in transmissions where the shaft needs room to expand thermally and still remain aligned.
Selection starts with the radial load, the rotation speed and the operating environment. Confirm that shaft and housing tolerances and fits match the recommendation. Grease or oil both work as lubricants; the choice depends on temperature and speed. Correct alignment limits extra stresses, and assembly should be done with the proper tools to protect the cage and raceways.
Interchange is possible with cylindrical roller bearings of similar design from other makers when dimensions and tolerances line up. Confirm the full part number and the technical data before substituting. MR supplies SKF and can help you compare it with other brands it carries.
Send the part number through WhatsApp or email to request a quote. The team replies promptly, provides the technical information and can suggest equivalents or help you choose if this model does not match your application.
Dimensions
Dimensions and tolerances: Message us the part number on WhatsApp and we'll verify its dimensions and version with the manufacturer's datasheet.
Frequently asked questions
- What does the TN9 suffix mean on an RNU bearing?
- TN9 indicates a polyamide cage reinforced with fiberglass. It is light, resists corrosion and suits moderate temperatures. Outer dimensions and load capacity stay the same, but the cage affects behavior at high speeds.
- Where is an RNU TN9 bearing used?
- It appears in equipment that carries high radial loads and allows axial displacement from thermal expansion, such as gearboxes, pumps, compressors and machine tools. Check load and speed conditions before selecting it.
- How do I request a quote for an RNU TN9 bearing?
- Send the complete bearing part number and the quantity you need via WhatsApp or email. MR replies with the quote and the technical information. If the application is unclear, the team can help you choose the right model.