NSK NNU 4952 cylindrical roller bearing de doble hilera

NSK NNU 4952 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 4952 and any equivalents.

When your equipment needs to carry heavy radial loads at speed in a tight envelope, the double row NNU series cylindrical roller bearing is a common choice. Two rows of rollers give it high stiffness and load capacity without taking up much space. You will find this design in machine tools, mining machinery and power transmission drives.

Reading the NNU code: the letters NNU tell you it is a double row cylindrical roller bearing with a flangeless inner ring and a flanged outer ring. The digits that follow — for example NNU 4920, NNU 4921, NNU 4922, NNU 4924, NNU 4926, NNU 4928, NNU 4930 and NNU 4932 — are the size code for bore and section. In this series the numeric suffix does not carry tolerance or clearance information, so always confirm the full part number with MR.

Typical applications include machine tool spindles, gearboxes, rolling mills, high-flow pumps and material handling equipment. The ability to handle both heavy radial loads and high speeds makes these bearings suitable for continuous duty. They are widely used in metalworking, mining, cement, power generation, steel, paper and oil and gas operations.

Selection checklist: start with the radial load, then the rotation speed and the environment. Verify the correct internal clearance and choose grease or oil lubrication based on the application. Mounting calls for precise alignment and clean conditions to keep contamination out. In dusty or humid locations, add seals or flingers. The shaft and housing fits must not reduce the operating clearance.

On equivalents: an NSK NNU series bearing can be replaced by another brand that follows the same dimensional designation, but compare load capacity, internal clearance and tolerances, not just the main dimensions. When you ask for an alternative, give the complete part number and the operating conditions so we can match it correctly. MR Industrial Accessories supplies bearings and power transmission parts across the United States and in several Latin American countries, and our team can suggest equivalents and help you choose.

To get a quote, send the part number or the size you need via WhatsApp or email. We reply promptly and, if necessary, point you to a compatible option.