NTN 32221U tapered roller bearing
- Brand
- NTN
- Category
- Bearings
- Subcategory
- Tapered roller bearings
We respond promptly.
Since 1945 · Martínez, Buenos Aires, Argentina
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How to read NTN 32221U
- 322Series
- Tapered roller bearings, 322 series. For the same bore, each series has a different outside diameter and width.
- 21Bore
- 105 mm bore: 21 × 5.
- USuffix
- NTN suffix: it defines the variant (sealing, cage, internal clearance or other features).
32221 is the standard (ISO) basic designation: it defines the type, the series and the bore.
Description
The NTN 32221U bearing has a 105 mm bore, a 190 mm outside diameter and a 53 mm total width (105 x 190 x 53 mm).
NTN 32221U is a reference of tapered roller bearing, within Bearings. Request a quote for 32221U via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.
NTN U series tapered roller bearings are components designed to support radial and axial loads in a single direction. Their tapered raceway and roller design allows linear contact that distributes loads better, ideal for applications with combined forces. They are used in gearboxes, wheel axles, agricultural machinery and industrial equipment requiring high load capacity and rigidity. MR Accesorios Industriales sells this series with personalized attention so you can find the exact size you need.
The U series designation is interpreted from the base number: for example, 30218U indicates a tapered roller bearing with a 90 mm bore, while 30220U corresponds to 100 mm. The U suffix identifies a design variant specific to NTN, which may include optimizations in the roller profile or surface treatment. To select the correct part number, take into account the shaft diameter and load conditions; if you need assistance, our technical team helps you interpret the nomenclature.
In Argentine industry, these bearings are used in a wide variety of applications: from gearboxes and power transmissions to road machinery, mining equipment and the agricultural sector. They are also present in milling machine spindles, conveyor rollers and lifting systems. Their ability to support combined loads makes them suitable for demanding environments, where precision and durability are critical. MR Accesorios Industriales supplies workshops, plants and machinery manufacturers throughout the country.
For correct mounting, it is essential to consider sealing and lubrication. These bearings are usually mounted in facing pairs to handle axial loads in both directions. Precise alignment between the shaft and the housing avoids additional stresses and extends service life. Internal clearance must be selected according to the application: reduced clearance improves rigidity, but requires adequate lubrication. We recommend following the manufacturer's instructions and using mounting tools that do not damage the raceways.
Regarding equivalences, NTN U series tapered roller bearings can be interchanged with products from other brands that follow the same dimensional designation, such as SKF, FAG or Timken, as long as tolerances and contact angle are respected. It is important to verify the suffix and technical specifications before replacing a part. If you have doubts, our team can advise you to find the compatible alternative that best suits your equipment.
If you need a quote for an NTN U series tapered roller bearing, write to us on WhatsApp with the part number or size you are looking for. At MR Accesorios Industriales we will quote it for you promptly and indicate the compatible alternative if necessary. We are your reliable partner for industrial spare parts in Buenos Aires, Argentina.
Dimensions
Boundary dimensions of the basic designation 32221 per ISO 355: 105 x 190 x 53 mm (d x D x T).
- Bore
- 105 mm
- Outside diameter (D)
- 190mm
- Total width (T)
- 53mm
Same size in SKF and other brands
Pages from other brands with the basic designation 32221: 105 x 190 x 53 mm (d x D x T) per ISO 355.
They share the boundary dimensions set by ISO 355, not the technical data: seals or shields, internal clearance, cage and load rating can differ by brand and suffix. We quote each one by its full part number.
Frequently Asked Questions
- What are the dimensions of the NTN 32221U bearing?
- The NTN 32221U bearing has a 105 mm bore, a 190 mm outside diameter and a 53 mm total width (105 x 190 x 53 mm). These are the standardised boundary dimensions (ISO 355) of the basic designation 32221.
- What does the U suffix mean in NTN bearings?
- The U suffix identifies a design variant within the NTN tapered roller series. It may involve improvements in the roller profile or surface treatment, but it does not change the main dimensions. To confirm the exact characteristics, consult us with the complete part number.
- How do I choose the right tapered roller bearing?
- You should consider the shaft diameter, radial and axial loads, and speed and temperature conditions. The type of mounting and lubrication are also key. If you send us this data, we will help you select the correct part number.
- Are NTN U series bearings interchangeable with other brands?
- Yes, they can be interchanged with bearings from other brands that follow the same dimensional designation and contact angle, such as SKF, FAG or Timken. Always verify tolerances and the suffix. If you have doubts, send us the part number and we will advise you.