NJ1011M Cylindrical Roller Bearing High Load High Speed Roller Bearing

Product Specification

NJ1011M Cylindrical Roller Bearing: High-Load, High-Speed & Reliable For Industry

I. Product Overview

As a key component in the field of industrial transmission, the NJ1011M cylindrical roller bearing is widely used in various mechanical equipment due to its unique design and excellent performance. It belongs to the category of single-row cylindrical roller bearings, with an inner diameter of 55mm, an outer diameter of 90mm, and a width of 18mm. The size specification is carefully considered, achieving a good balance between compact structure and efficient load-carrying capacity, and can be adapted to multiple equipment scenarios with strict requirements on space layout and power transmission.

II. Structural Design

1. Rolling Elements: The bearing uses high-precision cylindrical rollers as rolling elements. The rollers are made of high-quality bearing steel through multiple precision processing procedures, with extremely low surface roughness and high dimensional accuracy. The cylindrical shape ensures line contact with the raceways, which greatly improves the load-carrying capacity compared with point-contact bearings. Each roller has good dimensional consistency, which can evenly disperse the load during operation, reduce local stress concentration, and ensure the stable operation of the bearing.

2. Raceways: The inner and outer ring raceways of the bearing are processed by high-precision grinding, with high surface hardness and smoothness. The curvature and geometric accuracy of the raceways are perfectly matched with the cylindrical rollers, allowing the rollers to roll smoothly in the raceways. When bearing heavy loads, the raceways can effectively disperse stress, reduce wear, and extend the service life of the bearing.

3. Cage: It adopts a metal machined solid cage, made of high-strength materials. The cage is exquisitely designed to accurately separate and guide the movement of cylindrical rollers, preventing collision and friction between rollers, maintaining the correct arrangement and uniform distribution of rollers in the bearing, thus ensuring that the rollers can roll stably and orderly when the bearing is running at high speed, improving the overall performance.

4. Rib Structure: The outer ring of the NJ1011M bearing is provided with double ribs, and the inner ring has a single rib structure. This unique rib design endows the bearing with a certain axial load-carrying capacity, which can bear axial force in one direction, and at the same time limit the axial displacement of the shaft or housing in that direction, realizing one-way axial positioning, so that the bearing can work stably under complex stress conditions.

III. Performance Characteristics

1. High Radial Load-Carrying Capacity: The line contact between the cylindrical rollers and the raceways enables the NJ1011M bearing to perform excellently in radial load-carrying, and can efficiently cope with the strong radial force generated during the operation of heavy mechanical equipment. In fields such as industrial motors, machine tool spindles, and large transmission devices, it can stably support the rotation of the shaft, ensure the stable operation of the equipment, and effectively avoid equipment failures caused by excessive radial loads.

2. Good Resistance to Axial Force: Thanks to the structure of double ribs on the outer ring and single rib on the inner ring, although the bearing mainly bears radial loads, it can also bear a certain degree of one-way axial load. In the working environment with axial force interference, it can provide reliable axial positioning for the equipment, ensuring the normal operation of the equipment under composite load conditions.

3. Adaptability to High-Speed Operation: The precision processing technology and reasonable structural design make the bearing have low friction coefficient and little heat generation when rotating at high speed. The smooth rolling between the cylindrical rollers and the raceways, combined with the precise guidance of the cage to the rollers, enables the bearing to run stably at higher speeds, meeting the needs of high-speed, high-efficiency power transmission for equipment such as high-speed motors and precision machine tools.

4. Long Service Life and Reliability: High-quality materials, precision manufacturing processes, and reasonable structures together contribute to the long service life and high reliability of the NJ1011M bearing. Under normal working conditions, it can run stably for a long time, reduce the frequency of equipment maintenance, lower maintenance costs, and improve the overall operating efficiency and economy of the equipment.

IV. Application Fields

1. Industrial Machinery: It is widely used in various industrial machinery, such as transmission components of automated production lines and supporting parts of input and output shafts of reducers. Its strong radial load-carrying capacity and good axial force resistance can ensure the stability and reliability of industrial machinery under high-load and long-term operation, and improve production efficiency.

2. Machine Tool Equipment: It is often used for spindle support of machine tools, playing a key role in ensuring the machining accuracy of machine tools. During the high-speed operation of the machine tool, the high precision and low vibration characteristics of the NJ1011M bearing can effectively reduce the runout and vibration of the spindle, ensure the accurate relative movement between the tool and the workpiece, thereby improving the dimensional accuracy and surface quality of the machined parts.

3. Motor Manufacturing: In various motors, the bearing is used to support the motor rotor shaft. With its high-speed adaptability and reliable load-carrying capacity, it can ensure the stable and efficient rotation of the motor rotor, realize the efficient conversion of electrical energy to mechanical energy, and at the same time reduce the noise and vibration during motor operation, improving the operating efficiency and service life of the motor.

4. Ventilation and Refrigeration Equipment: In equipment such as ventilators and air-conditioning compressors, the NJ1011M bearing can bear the radial and certain axial loads generated during equipment operation, adapt to the working characteristics of long-term continuous operation of the equipment, ensure stable ventilation and refrigeration of the equipment, and create a comfortable living and working environment for people.

V. Dimensions and Specification Parameters

VI. Maintenance Points

1. Lubrication Management: Proper lubrication is the key to ensuring the good performance and long life of the NJ1011M bearing. High-performance grease or lubricating oil suitable for the equipment's operating conditions, such as temperature, speed, and load, should be selected. Regularly check the remaining amount and state of the lubricating medium, and replenish or replace it in time. In harsh environments such as high temperature, high humidity, and heavy dust, lubricating products with special properties (such as high temperature resistance, water resistance, and dust resistance) should be selected.

2. Regular Inspection: Establish a periodic inspection mechanism to conduct a comprehensive inspection of the bearing. Through visual inspection, pay attention to abnormal wear, deformation, cracks, and whether the cage and ribs are intact; use professional instruments to monitor parameters such as vibration and temperature of the bearing during operation. Once abnormal vibration increase or temperature exceeds the normal range (generally, the normal working temperature is 10 - 20℃ higher than the ambient temperature), the machine should be shut down immediately to check for faults, and the bearing should be replaced in time if necessary to prevent the fault from expanding.

3. Installation Requirements: During installation, it is necessary to ensure a clean working environment to avoid foreign objects entering the bearing. Use appropriate installation tools and strictly follow the correct installation procedures to ensure that the matching accuracy between the bearing and the shaft and bearing seat meets the standards. During installation, prevent improper impact or excessive pressure on the bearing to avoid damage to the bearing structure and affect its performance.

4. Storage Notes: If the bearing is not used temporarily, it should be stored in a dry, clean, and temperature-appropriate environment, away from adverse factors such as moisture, high temperature, and strong magnetic fields. The bearing can be properly wrapped with anti-rust paper or plastic film to prevent rust and corrosion, ensuring that the performance of the bearing is not affected during subsequent use.