NSK 7220 A angular contact ball bearing
- Brand
- NSK
- Category
- Bearings
- Subcategory
- Angular contact ball bearings
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Decoding NSK 7220 A
- 72Series
- Angular contact ball bearings, 72 series. Series differ in outside diameter and width even when the bore is the same.
- 20Bore
- Bore 100 mm (20 × 5).
- ASuffix
- NSK suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
7220 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
NSK 7220 A measures 100 mm across the bore and 180 mm across the outside diameter; its width is 34 mm (100 x 180 x 34 mm).
NSK 7220 A 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 7220 A and any equivalents.
Angular contact ball bearings in the NSK A series are built to take radial and axial forces from one direction. Because the raceways are offset, the balls meet them at an angle, so these bearings can carry more axial load than a deep groove ball bearing. They fit equipment where accuracy and stiffness matter, such as spindles, pumps and gearboxes.
The part number combines a bore code with a suffix for the contact angle. Take 7003 A, 7004 A and 7005 A: all are single row bearings with a 30° contact angle. The last digits grow with the bore diameter, and the letter A marks the standard angle for this series. Other suffixes can point to a polyamide cage, internal clearance or a precision class, so it pays to confirm the complete reference before asking for a quote.
You will find these bearings in metalworking, food processing, chemical and petrochemical plants. Common equipment includes lathe and milling spindles, centrifugal pumps, screw compressors and speed reducers. Power transmission setups that call for high rigidity and smooth rotation, like machine tools and measuring devices, also use them. Their ability to handle combined loads makes them a fit for tandem or paired mounting arrangements.
Choosing the right bearing starts with the axial and radial load, the speed and the operating environment. Sealing matters: where dust or moisture is present, pick a variant with seals or shields. Lubrication has to match the temperature and speed, and high-precision uses often call for low-friction grease. During mounting, align carefully and, in many cases, set preload to remove axial clearance. Follow the maker's guidance on tightening torque and internal clearance.
On equivalences, angular contact bearings from other makers with similar designations may work as replacements, but you must check dimensions and contact angle. An SKF 7005 ACD/P4A, for instance, could stand in for an NSK 7005 A when tolerances and clearance line up. Suffixes are not always equivalent, though: the final letters can signal differences in cage, angle or precision. The safe route is to quote with the full part number; if it is unclear, send a photo or the main dimensions.
For NSK A series angular contact bearings, send the part number or dimensions through WhatsApp or email and our team will reply promptly. We can also suggest equivalents and help you pick the right variant for your application.
Dimensions
100 x 180 x 34 mm (d x D x B): boundary dimensions for basic designation 7220, according to ISO 15.
- Bore
- 100 mm
- Outside diameter (D)
- 180mm
- Width (B)
- 34mm
SKF and other brands, same size
Other brands' pages with basic designation 7220: 100 x 180 x 34 mm (d x D x B) per ISO 15.
- Need the SKF 7220? We can also quote:7220 BEP7220 BEY7220 BECBM3 more →
- FAG7220-B-XL-JP7220-B-XL-TVP
- NTN72207220B7220C
- RKB7220
- TIMKEN7220 B
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
- NSK 7220 A bearing: what are its dimensions?
- NSK 7220 A measures 100 mm across the bore and 180 mm across the outside diameter; its width is 34 mm (100 x 180 x 34 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation 7220.
- What does the A suffix mean in NSK bearings?
- The A suffix stands for a 30° contact angle, the standard for this series. That angle sets the axial load capacity and rigidity. Other suffixes may cover cage, clearance or precision.
- How do I choose between an angular contact bearing and a deep groove ball bearing?
- When the application sees a notable axial load in one direction, the angular contact bearing handles it better. If the load is mostly radial and space is tight, a deep groove ball bearing may do the job. The decision comes down to the load ratio and the precision required.
- Are NSK A series bearings interchangeable with other brands?
- They can be interchangeable when dimensions, contact angle and tolerances match. Not every suffix is equivalent across brands. Send us the original part number or the dimensions and we will point you to a compatible option.