SKF RNNU 4948 B/SPW33 cylindrical roller bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Cylindrical roller bearings
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Description
SKF RNNU 4948 B/SPW33 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 RNNU 4948 B/SPW33 and any equivalents.
For machine tool spindles, gearboxes and other transmission equipment that demand rigidity and accuracy, SKF cylindrical roller bearings from the RNNU B/SPW series are a common choice. They handle high radial loads and considerable speeds. MR Industrial Accessories supplies this series to customers across the United States and Latin America.
The part number tells you a lot about the bearing. RNNU identifies a single-row cylindrical roller bearing with a flangeless inner ring and an outer ring with two flanges, so axial displacement is possible. The B stands for an optimized internal design, and SPW indicates a polyamide window cage built for high speeds. The number in the middle sets the size, as seen in RNNU 4928 B/SPW33, RNNU 4930 B/SPW33 and RNNU 4948 B/SPW33.
These bearings show up in metalworking, food and beverage, mining and power generation. Typical spots include milling and grinding spindles, speed reducers, high-flow pumps and continuous process equipment. Where dimensional precision is critical, their rigidity and radial load capacity make them a good fit.
When selecting, look at the radial load, rotation speed and operating environment. Choose seals or protective plates based on contamination levels and available lubrication. The SPW polyamide cage suits high speeds, but verify it is compatible with your lubricant. During mounting, check alignment and fits to avoid parasitic loads. Use the specified lubricant and match internal clearance to the application.
Cylindrical roller bearings in this series can be interchanged with other brands that follow the same dimensional and design designation. Always compare tolerances and internal clearance before substituting one manufacturer's bearing for another. MR Industrial Accessories supplies SKF as one of its bearing lines, with the technical support to go with it.
If you need help choosing, send the part number or dimensions via WhatsApp or email. Our team replies promptly and can suggest equivalents or assist with selection.
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 RNNU B/SPW designation mean?
- RNNU is a single-row cylindrical roller bearing with a flangeless inner ring and a two-flange outer ring. B means optimized internal design, SPW is a polyamide window cage, and the middle number indicates size.
- Where are these bearings typically used?
- They are found in machine tool spindles, reducers, pumps and continuous process equipment. Their radial load capacity and rigidity suit precision assemblies in metalworking, food and mining.
- How do I select the right bearing?
- Consider radial load, speed and environment. Check sealing, lubrication and internal clearance. The SPW cage is for high speeds. Send your application data and we will advise you.