NTN 21314 spherical roller bearing
- Brand
- NTN
- Category
- Bearings
- Subcategory
- Spherical roller bearings
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Decoding NTN 21314
- 213Series
- Spherical roller bearings, 213 series. Series differ in outside diameter and width even when the bore is the same.
- 14Bore
- Bore 70 mm (14 × 5).
21314 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
NTN 21314 measures 70 mm across the bore and 150 mm across the outside diameter; its width is 35 mm (70 x 150 x 35 mm).
NTN 21314 belongs to spherical 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 21314 and any equivalents.
When shafts deflect or alignment is not perfect, NTN spherical roller bearings keep equipment running. Their two rows of rollers and spherical raceway let the outer ring oscillate, handling radial loads and axial loads in both directions. You will find them in conveyors, mills, pumps, and mining machinery.
The 239 series uses a simple code: 239 indicates a thin-section spherical roller bearing, and the digits after the slash give the bore in millimeters directly. So 239/500 has a 500 mm bore, 239/530 has a 530 mm bore, and so on. No multiplication needed. This makes size identification straightforward when you are reading a drawing or a nameplate.
These bearings suit cement, mining, steel, and material handling operations. Typical equipment includes ball mills, crushers, belt conveyors, high-flow centrifugal pumps, lifting gear, paper machines, and large industrial fans. They perform where the shaft may deflect or the structure is not completely rigid, thanks to their ability to take combined loads and compensate for misalignment.
Selection starts with the radial and axial loads, rotation speed, and environmental conditions. Check sealing: in dusty or humid areas, choose variants with seals or protective plates. Mount with suitable tools to avoid damaging rollers or raceways. Use the specified lubricant and verify initial alignment to take advantage of the self-aligning capability.
For equivalences, NTN spherical roller bearings interchange with other brands that follow the same international designation. An NTN 239/500 matches a 239/500 from SKF, FAG, or NSK, provided tolerances and cage type are maintained. Still, verify each manufacturer's technical data, as load capacity or materials may differ. If in doubt, send us the original part number.
To request a quote for an NTN spherical roller bearing, message us on WhatsApp or email with the code or size. We reply promptly and can suggest equivalents or help you choose the right variant for your application.
Dimensions
70 x 150 x 35 mm (d x D x B): boundary dimensions for basic designation 21314, according to ISO 15.
- Bore
- 70 mm
- Outside diameter (D)
- 150mm
- Width (B)
- 35mm
SKF and other brands, same size
Other brands' pages with basic designation 21314: 70 x 150 x 35 mm (d x D x B) per ISO 15.
- Need the SKF 21314? We can also quote:21314 E21314 EK21314 E/C3
- FAG21314-E1-XL21314-E1-XL-K
- NSK21314EAE421314EAKE4
- RKB21314
- TIMKEN21314EJ
What they share are the ISO 15 boundary dimensions, not the specs: seals or shields, internal clearance, cage and load rating may vary with brand and suffix. Every quote is by full part number.
Frequently asked questions
- NTN 21314 bearing: what are its dimensions?
- NTN 21314 measures 70 mm across the bore and 150 mm across the outside diameter; its width is 35 mm (70 x 150 x 35 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation 21314.
- What does the designation 239/500 mean on an NTN bearing?
- The 239 series indicates a thin-section spherical roller bearing. The number after the slash, 500, is the bore diameter in millimeters. So a 239/500 has a 500 mm bore. This standard nomenclature makes size identification easy.
- When should I use a spherical roller bearing instead of a deep groove ball bearing?
- Use a spherical roller bearing when you have high radial loads, axial loads in both directions, or possible misalignment between shaft and housing. It compensates for misalignment and handles combined loads better. If alignment is perfect and loads are moderate, a deep groove ball bearing may be sufficient.
- How can I request a quote for a specific NTN bearing?
- Write to us via WhatsApp or email with the complete code or the size you need. We will quote it promptly. If you do not have the code, we can help you identify it from the equipment or original part data.