
SKF NN 3028/SPW33 cylindrical roller bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Cylindrical roller bearings
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Decoding SKF NN 3028/SPW33
- NN 30Series
- Cylindrical roller bearings, NN 30 series. Series differ in outside diameter and width even when the bore is the same.
- 28Bore
- Bore 140 mm (28 × 5).
- SPW33Suffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
NN 3028 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF NN 3028/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 NN 3028/SPW33 and any equivalents.
SKF NN series cylindrical roller bearings with the SPW suffix are precision components built to handle heavy radial loads at high speeds. Their double-row design suits demanding industrial machinery. MR Industrial Accessories LLC supplies these bearings to customers across the United States and Latin America, and our team can help you match the right bearing to your operating conditions.
The part number tells you a lot about the bearing. The NN prefix means it is a double-row cylindrical roller bearing, which gives it higher radial load capacity than a single-row version. The SPW suffix points to a special execution: the W stands for a stamped steel cage, while SP can indicate tighter dimensional tolerances or reduced internal clearance under the SKF standard. For example, in NN 3028/SPW33, 3028 sets the main dimensions and the 33 suffix indicates a special heat treatment for high temperatures. Reading the code correctly helps you confirm the bearing's features before you order.
These bearings are found in machine tools, grinding spindles, printing equipment, compressors, high-pressure pumps, and speed reducers. They also appear in steel, cement, and mining operations where radial loads are intense and conditions are severe. Their ability to run at high speeds makes them suitable for large electric motors and turbines. In railway and marine applications, they are used in shafts and transmissions that call for long service life and reduced maintenance.
When selecting a bearing from this series, consider the radial load, rotation speed, and the environment. Sealing matters: if dust, moisture, or particles are present, look at variants with seals or shields. Internal clearance should be adequate to compensate for thermal expansion and to distribute load evenly between the rows. Lubrication, whether grease or oil, must match the temperature and speed; the wrong choice can lead to premature failure. During assembly, precise alignment and the right tools are essential to avoid damaging rollers and raceways.
Equivalents from other manufacturers may exist for double-row cylindrical roller bearings with similar suffixes, but dimensions and tolerances can differ. Always verify bore, outer diameter, and width, along with internal clearance and load capacity. Interchangeability between brands is not always direct, so it is wise to consult a specialist before substituting one bearing for another. Our team can help you compare options.
For a quote on an SKF cylindrical roller bearing from the NN series with the SPW suffix, or any other component, send the complete bearing code via WhatsApp or email. MR Industrial Accessories LLC provides personalized support and can suggest equivalents to keep your equipment running.
Dimensions
- Bore
- 140mm
Frequently asked questions
- What does the SPW suffix mean on an SKF bearing?
- The SPW suffix indicates a special execution: the W refers to a stamped steel cage, while SP may indicate tighter dimensional tolerances or reduced internal clearance. Check the technical data sheet to confirm the exact characteristics.
- Where are double-row cylindrical roller bearings used?
- They are used in applications requiring high radial load capacity and high speeds, such as machine tools, spindles, compressors, pumps, reducers, and equipment in the steel, cement, and mining industries.
- How can I request a quote for this bearing?
- Send the complete bearing code via WhatsApp or email. Our team will respond promptly with the information you need, and we can also advise you on equivalent alternatives.

