NSK NNU 4920 KR cylindrical roller bearing de doble hilera
- Brand
- NSK
- Category
- Bearings
- Subcategory
- Cylindrical roller bearings
- Series
- NNU
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Decoding NSK NNU 4920 KR
- NNU 49Series
- Cylindrical roller bearings, NNU 49 series. Series differ in outside diameter and width even when the bore is the same.
- 20Bore
- Bore 100 mm (20 × 5).
- KRSuffix
- NSK suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
NNU 4920 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
NSK NNU 4920 KR belongs to cylindrical roller bearing de doble hilera, 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 NNU 4920 KR and any equivalents.
When you need a bearing that handles heavy radial forces and keeps running at speed, the NSK NNU KR series is a solid choice. This double row cylindrical roller bearing uses two rows of rollers to deliver stiffness and load capacity for tough jobs in heavy machinery, mining, steelmaking and similar fields.
Reading the part number helps you pick the right size. NNU tells you it's a double row cylindrical roller bearing with separable inner and outer rings. The KR suffix points to a particular design, typically with a machined brass cage and roller guidance. The digits in the middle set the main dimensions, as you can see in NNU 4920 KR, NNU 4921 KR, NNU 4922 KR, NNU 4924 KR, NNU 4926 KR and NNU 4928 KR.
These bearings shine in setups where radial loads dominate and precision matters. You'll find them in industrial gearboxes, machine tools, rolling mill stands, cranes and power transmission systems. Cement plants, mines, steel mills and pulp and paper operations count on the NNU KR series to avoid unplanned downtime.
Selection comes down to radial load capacity, operating speed and the surrounding conditions. Mount them with exact alignment and keep everything spotless. Whether you use grease or oil, the right lubrication adds life. In dirty environments, add extra sealing. Always check internal clearance for your specific application to prevent overloading.
Looking for a replacement? NSK NNU KR bearings can be swapped with other brands that use the same dimensional nomenclature, but double-check tolerances and internal clearance before installing a different make. MR supplies this line and can help you confirm compatibility.
To get a quote, send the full part number or the dimensions you need via WhatsApp or email. The team responds quickly and can suggest an equivalent if you give us a part number from another brand or an unidentified bearing.
Dimensions
- Bore
- 100 mm
Frequently asked questions
- What does the NNU KR designation mean on an NSK bearing?
- NNU indicates a double row cylindrical roller bearing with separate rings, while KR refers to an execution with a machined brass cage. The numbers in the center specify the main dimensions, as in NNU 4920 KR.
- Where is the NNU KR bearing typically used?
- It's suited for high radial loads and precision applications, such as gearboxes, machine tools, rolling mill equipment and cranes. Steelmaking, cement and mining industries rely on it for durability.
- How do I request a quote for an NNU KR bearing from MR?
- Send the complete part number or the dimensions you need via WhatsApp or email. MR will quote you promptly and help you select the right bearing.