NSK NU1021 cylindrical roller bearing
- Brand
- NSK
- Category
- Bearings
- Subcategory
- Cylindrical roller bearings
- Series
- NU
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Other brands for this category
Ask us for alternatives. We check every equivalent against the part number and your application.
NSK and NTN: matching part numbers →NSK and RKB: matching part numbers →
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Decoding NSK NU1021
- NU 10Series
- Cylindrical roller bearings, NU 10 series. Series differ in outside diameter and width even when the bore is the same.
- 21Bore
- Bore 105 mm (21 × 5).
NU 1021 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
NSK NU1021 measures 105 mm across the bore and 160 mm across the outside diameter; its width is 26 mm (105 x 160 x 26 mm).
NSK NU1021 belongs to cylindrical 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 NU1021 and any equivalents.
NSK NU series cylindrical roller bearings are built to handle high radial loads at high speeds. The cylindrical rollers run on parallel raceways, which supports precise operation and high load capacity. You will find them in gearboxes, electric motors, pumps and transmission equipment. MR Industrial Accessories supplies the NSK brand to customers across the United States and several Latin American countries.
Reading the NU code helps you specify the right bearing. The letters NU mean two ribs on the outer ring and none on the inner ring, so the shaft can move axially relative to the housing. The numbers that follow give the size and dimension series. For instance, NU312 is a medium series bearing with a 60 mm bore, and NU1011 is a light series bearing with a 55 mm bore. Suffixes such as C3, C4 or ECP indicate additional characteristics like increased internal clearance or a polyamide cage.
These bearings appear in metallurgy, cement, mining, food and petrochemical plants. They are used in speed reducers, electric motors, centrifugal pumps, industrial fans, machine tools and conveying equipment. Because they take radial loads well, they suit applications where the shaft turns at high speed and must stay precise and reliable.
Selecting an NU bearing means checking the radial load, the rotation speed, the lubrication method (grease or oil) and the operating environment. During mounting, align the shaft and housing carefully to avoid extra stresses. Use suitable tools such as pullers and presses, and check internal clearance after installation. Proper lubrication is essential for a long service life.
For equivalences, NSK NU series bearings can be replaced by bearings from other brands that follow the same designation and standardized dimensions. Verify tolerances and internal clearance to ensure correct operation. If you are unsure, our team can help you choose.
To request a quote for NSK NU series cylindrical roller bearings, send the part number or the dimensions you need via WhatsApp or email. MR Industrial Accessories provides personal attention and will reply promptly.
Dimensions
105 x 160 x 26 mm (d x D x B): boundary dimensions for basic designation NU 1021, according to ISO 15.
- Bore
- 105 mm
- Outside diameter (D)
- 160mm
- Width (B)
- 26mm
SKF and other brands, same size
Other brands' pages with basic designation NU 1021: 105 x 160 x 26 mm (d x D x B) per ISO 15.
- Need the SKF NU 1021? We can also quote:NU 1021 MLNU 1021 ML/C3
- FAGNU1021-XL-M1
- NTNNU1021
- RKBNU 1021
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 NU1021 bearing: what are its dimensions?
- NSK NU1021 measures 105 mm across the bore and 160 mm across the outside diameter; its width is 26 mm (105 x 160 x 26 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation NU 1021.
- What does the NU designation mean in a bearing?
- NU means the bearing has two ribs on the outer ring and none on the inner ring, allowing axial displacement. It suits applications with radial loads and a need for axial freedom.
- What applications do NU bearings have?
- They are used in gearboxes, electric motors, pumps, fans and industrial machinery that must withstand high radial loads at high speeds.
- How do I request a quote for NU bearings?
- Send us the part number or the dimensions you need via WhatsApp or email. We will reply promptly with technical support.