NTN 7228B angular contact ball bearing
- Brand
- NTN
- Category
- Bearings
- Subcategory
- Angular contact ball bearings
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Other brands for this category
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Decoding NTN 7228B
- 72Series
- Angular contact ball bearings, 72 series. Series differ in outside diameter and width even when the bore is the same.
- 28Bore
- Bore 140 mm (28 × 5).
- BSuffix
- NTN suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
7228 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
NTN 7228B measures 140 mm across the bore and 250 mm across the outside diameter; its width is 42 mm (140 x 250 x 42 mm).
NTN 7228B belongs to angular contact ball 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 7228B and any equivalents.
For equipment that must handle radial and axial forces simultaneously in a single direction, the NTN B series angular contact ball bearing is a single-row solution with offset raceways. It suits applications where rotational accuracy and axial stiffness are critical, such as spindles, pumps, gearboxes, and transmission systems. MR Industrial Accessories LLC supplies this line to customers across the United States and Latin America, and provides quick quotes when you send the exact part number via WhatsApp or email.
The B series part number combines a size number and a suffix. Take 7200B, 7201B, 7202B, 7203B, 7204B, 7205B, 7206B, and 7207B: the first digits indicate the dimensional series, the next digit gives the bore size, and the final B denotes the contact angle. This code uniquely identifies the bearing, so always reference the number on your drawing or the old component.
You will find these bearings in machine tool spindles, centrifugal pumps, compressors, gearboxes, transmission housings, and process equipment in food, chemical, and metalworking plants. They also appear in industrial fans and assemblies that must absorb axial thrust along with radial load. For unidirectional thrust, the B series is the single-row choice; for thrust in both directions, mount them in pairs.
When selecting and installing, consider internal clearance, sealing, and lubrication. The B series is typically open, so sealing is achieved with radial shaft seals or labyrinths in the housing. Proper alignment and controlled preload are essential: uneven tightening or a misaligned seat will shorten bearing life. Lubrication can be grease or oil depending on speed and operating temperature, and axial clearance should be verified before startup.
Cross-brand equivalents are matched by dimensional code and contact angle. The same size may carry different suffix letters from different manufacturers, and they are not always interchangeable without checking angle and clearance. If you have an unidentified part or another brand's code, MR Industrial Accessories LLC can suggest the equivalent NTN reference and quote it. Interchangeability is always confirmed against the drawing and the load conditions of the equipment.
To request a quote for an NTN B series angular contact bearing, send the part number via WhatsApp or email to MR Industrial Accessories LLC. We serve workshops, plants, and maintenance teams throughout the United States and several Latin American countries, and we help you define the correct variant for your assembly.
Dimensions
140 x 250 x 42 mm (d x D x B): boundary dimensions for basic designation 7228, according to ISO 15.
- Bore
- 140 mm
- Outside diameter (D)
- 250mm
- Width (B)
- 42mm
SKF and other brands, same size
Other brands' pages with basic designation 7228: 140 x 250 x 42 mm (d x D x B) per ISO 15.
- Need the SKF 7228? We can also quote:7228 BCBM
- FAG7228-B-XL-MP
- NSK7228 A7228 B
- RKB7228
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 7228B bearing: what are its dimensions?
- NTN 7228B measures 140 mm across the bore and 250 mm across the outside diameter; its width is 42 mm (140 x 250 x 42 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation 7228.
- What does the letter B indicate in the bearing designation?
- The final B specifies the contact angle of the series. This is critical for mounting because it determines how the bearing performs under axial load. If you are unsure, send us the complete part number and we will confirm the reference.
- Can these bearings be mounted in pairs?
- Yes. When axial thrust acts in both directions, two bearings are mounted face-to-face or paired according to the equipment design. In that case, preload and seat alignment must be controlled to distribute the load evenly.
- How do I request a quote for an NTN part number?
- Write to us on WhatsApp or email with the part number shown on the bearing or drawing, for example 7205B, and we will quote it promptly. If the part lacks identification, send dimensions and a photo and we will indicate the reference.