NTN 21310C spherical roller bearing
- Brand
- NTN
- Category
- Bearings
- Subcategory
- Spherical roller bearings
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Decoding NTN 21310C
- 213Series
- Spherical roller bearings, 213 series. Series differ in outside diameter and width even when the bore is the same.
- 10Bore
- Bore 50 mm (10 × 5).
- CSuffix
- NTN suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
21310 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
NTN 21310C measures 50 mm across the bore and 110 mm across the outside diameter; its width is 27 mm (50 x 110 x 27 mm).
NTN 21310C 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 21310C and any equivalents.
For shafts that flex or mountings that never line up perfectly, the NTN C series spherical roller bearing offers a practical answer. Its two rows of rollers run on a spherical outer raceway, so the inner ring can oscillate and compensate for angular error while still carrying heavy radial loads and axial loads in both directions. You will find these bearings in continuous process equipment such as conveyors, mills and pumps, where loads are high and alignment is rarely ideal.
Reading the code is straightforward. Take 21308C, 21309C or 21310C: the basic number sets the size and dimensional series, while the trailing C identifies a construction variant in the NTN spherical roller family, typically using a stamped steel cage and a load-oriented design. Shaft diameter, load profile and housing style are the inputs you need before locking in a code.
Typical applications include gearboxes, vibrating screens, ball mills and kiln support rollers, as well as equipment in mining, cement, steel, paper, aggregate processing and food plants. Because the bearing tolerates angular movement, it suits long shafts or shafts that deflect under load, where a rigid bearing would not survive the misalignment.
Selection comes down to radial and axial load, speed and operating environment. In dusty or damp conditions, a sealed variant is the safer choice; in clean, oil-lubricated applications, an open design may be all you need. Proper mounting means aligning the bearing initially, applying adequate lubrication and setting internal clearance to account for operating temperature. Cage type and heat treatment also affect how long the bearing lasts.
Spherical roller bearings from different makers can be swapped when the main dimensions and execution match. Before replacing a part, verify the full code, the cage suffix and the sealing arrangement. If you only have another brand's code, send it over and we can point you to the compatible equivalent, working from the exact designation on the equipment or drawing.
To get a quote, message us on WhatsApp or email with the code or shaft size. MR Industrial Accessories will confirm the exact reference and help you pick the right variant for the job. If the code is missing, we can assist with identification.
Dimensions
50 x 110 x 27 mm (d x D x B): boundary dimensions for basic designation 21310, according to ISO 15.
- Bore
- 50 mm
- Outside diameter (D)
- 110mm
- Width (B)
- 27mm
SKF and other brands, same size
Other brands' pages with basic designation 21310: 50 x 110 x 27 mm (d x D x B) per ISO 15.
- Need the SKF 21310? We can also quote:21310 E21310 EK21310 E/C31 more →
- FAG21310-E1-XL21310-E1-XL-K
- NSK21310EAE421310EAKE4
- RKB21310
- TIMKEN21310EJ
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 21310C bearing: what are its dimensions?
- NTN 21310C measures 50 mm across the bore and 110 mm across the outside diameter; its width is 27 mm (50 x 110 x 27 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation 21310.
- What does the C suffix mean on an NTN bearing?
- In the NTN spherical roller series, C generally denotes an execution with a stamped steel cage and particular design features. Send the complete code and we will quote the matching reference.
- Should I choose an open or sealed bearing?
- It depends on the environment. Dust, moisture or contaminants call for seals; clean, oil-lubricated applications can use an open version. Share your working conditions and we will advise.
- Can I replace another brand's bearing with an NTN one?
- Yes, provided the main dimensions and execution type align. Give us the original part code and we will identify the compatible NTN equivalent using the exact designation.