Kesle Double Row Self Aligning Ball Bearing 1216 High Radial Load For Machinery

1216 Self-Aligning Ball Bearing: High Radial Load, Aligning & Reliable For Machinery

I. Product Overview

The 1216 self - aligning ball bearing is a high - precision mechanical component engineered to cater to the requirements of diverse machinery operating in complex and rigorous conditions. As an integral part of the self - aligning ball bearing series, it boasts specific dimensional attributes: an inner diameter (d) of 80mm, an outer diameter (D) of 140mm, and a width (B) of 26mm. These dimensions equip it to be versatilely applied in a wide array of scenarios where not only significant radial loads need to be efficiently managed but also where shaft misalignment issues might hinder the stable operation of the machinery.

II. Structural Design

2.1 Rolling Elements

The 1216 bearing is outfitted with two rows of meticulously crafted spherical balls. These balls are typically fabricated from high - quality bearing steel, such as GCr15, which is celebrated for its exceptional hardness and remarkable wear - resistance. The manufacturing process adheres to stringent high - level quality control standards, guaranteeing that each ball possesses a flawlessly smooth surface and precise dimensional accuracy. The spherical shape of the balls offers an advantage by creating a larger contact area with the raceways compared to some other bearing types. This expanded contact area effectively distributes the load evenly across the bearing components, minimizing the risk of local stress concentrations that could otherwise lead to premature wear and failure.

2.2 Raceways

The inner ring of the 1216 bearing features a double - row raceway design, while the outer ring is equipped with a spherical raceway. The spherical outer - ring raceway is the cornerstone of the bearing's self - aligning function. It permits the inner ring and the balls to adjust their relative positions with respect to the outer ring, effectively compensating for misalignment between the shaft and the housing. Both the inner and outer ring raceways undergo advanced heat - treatment processes to attain a high surface hardness, generally in the HRC58 - 64 range. This high hardness endows the bearing with excellent wear - resistance and fatigue - resistance, enabling it to endure various operating conditions and significantly prolonging its service life.

2.3 Cage

A high - strength cage, usually constructed from steel, plays a vital role in the operation of the 1216 bearing. It serves to separate and guide the balls. The cage is precisely designed with pockets that securely hold the balls in place, preventing them from colliding with one another during high - speed rotation. This not only ensures a smooth and stable rolling motion of the balls but also contributes to the overall reliability and efficiency of the bearing. In some advanced designs, the cage may be subjected to special coatings or additional heat - treatment procedures. These treatments further enhance the cage's strength, wear - resistance, and its ability to perform optimally in harsh environments, such as those with high temperatures, high levels of contamination, or corrosive substances.

III. Performance Characteristics

3.1 Radial Load - Carrying Capacity

The 1216 self - aligning ball bearing is primarily designed to handle substantial radial loads. Its double - row ball configuration, in combination with the large contact area between the balls and the raceways, enables it to bear a significant amount of radial force. Although the exact basic rated dynamic load rating (Cr) may vary depending on the manufacturer and specific product specifications, it is generally well - suited for applications involving medium - to - heavy radial loads. This makes it a popular choice in a wide variety of machinery, including motors, conveyors, industrial gearboxes, and various types of manufacturing equipment, where reliable radial load support is essential for smooth and efficient operation.

3.2 Limited Axial Load - Carrying Ability

While the 1216 bearing is mainly intended for radial load applications, it can withstand a small amount of axial load in either direction. However, it should be noted that subjecting the bearing to a large or pure axial load can result in uneven loading on the balls, which may accelerate wear and reduce the bearing's overall lifespan. The rib structure on the inner and outer rings, together with the arrangement of the balls, enables the bearing to resist a limited degree of axial thrust. This limited axial load - carrying capacity can be useful in applications where there are minor axial forces in addition to the dominant radial loads, providing some flexibility in dealing with complex load situations.

3.3 Exceptional Self - Aligning Capability

The most prominent feature of the 1216 bearing is its outstanding self - aligning property. The spherical outer - ring raceway allows the bearing to automatically adapt to misalignment between the shaft and the housing within a certain angle. Under normal operating conditions, the bearing can tolerate a misalignment angle of approximately 2° - 4°. This self - aligning ability is extremely important in applications where shaft deflection or misalignment is likely to occur, such as in long - shaft machinery, equipment with flexible couplings, or in situations where the installation of components may not be perfectly aligned. By compensating for misalignment, the 1216 bearing helps to reduce stress concentrations in the bearing and connected components, thus preventing premature failure and enhancing the overall reliability and durability of the machinery.

3.4 High - Speed Rotation Adaptability

The 1216 self - aligning ball bearing is designed to operate smoothly and efficiently at relatively high speeds. The optimized design of its rolling elements, raceways, and cage, combined with proper lubrication, results in low friction and reduced vibration during high - speed rotation. The use of high - quality materials and precise manufacturing processes ensures that the bearing can maintain its performance under demanding high - speed conditions. However, like all bearings, its limiting speed is affected by several factors, including the type of lubrication used, the operating temperature, and the magnitude and nature of the applied loads. In high - speed applications, careful consideration must be given to these factors to ensure optimal bearing performance and longevity.

IV. Application Fields

4.1 Industrial Machinery

In the industrial sector, the 1216 bearing is widely utilized in a variety of machinery. In large - scale industrial motors, it provides reliable support for the rotor, effectively managing the radial loads generated during operation. In conveyor systems, it enables seamless conveyor - belt movement by accommodating misalignment that may occur due to uneven installation, thermal expansion, or mechanical vibrations. In industrial gearboxes, the bearing plays a crucial role in facilitating efficient power transmission while withstanding the complex loads associated with meshing gears. Its self - aligning feature is particularly valuable in industrial applications where shaft misalignment is common, as it helps to improve the overall reliability and efficiency of the machinery, reducing downtime and maintenance costs.

4.2 Agricultural Machinery

Agricultural machinery often operates in harsh and challenging environments, with significant vibrations and potential misalignment caused by uneven terrain. The 1216 self - aligning ball bearing is well - suited to such applications. For example, in tractors, it can be used in the axle support systems to handle the heavy loads and misalignment resulting from the tractor's movement over rough ground. In agricultural equipment such as combine harvesters, the bearing supports the rotating parts, ensuring smooth operation even when the equipment is subjected to vibrations and shocks during the harvesting process. Its self - aligning ability helps to minimize wear and maintenance requirements, making it an ideal choice for agricultural machinery, where reliability and durability are essential for maximizing productivity.

4.3 Textile Machinery

Textile machinery requires bearings that can operate precisely and smoothly at relatively high speeds. The 1216 bearing is commonly used in textile machines such as spinning frames and looms. In spinning frames, it supports the rotating spindles, effectively handling the radial loads while compensating for any misalignment that may occur due to the high - speed rotation and mechanical vibrations inherent in the spinning process. In looms, the bearing helps to ensure the smooth operation of the shuttle - moving mechanisms and other rotating parts. Its self - aligning property is crucial for maintaining the accuracy and efficiency of textile machinery, as even minor misalignments can have a significant impact on the quality of the textiles produced.

4.4 Woodworking Machinery

Woodworking machinery, such as sawmills and wood lathes, often experiences substantial radial loads and vibrations during operation. The 1216 self - aligning ball bearing is well - adapted to these applications. In sawmills, it can be used in the support systems for the saw blades, handling the heavy radial forces generated during cutting while also adapting to any misalignment caused by the vibrations of the machinery. In wood lathes, the bearing supports the rotating workpiece, enabling smooth and accurate turning operations. Its ability to self - align helps to prevent premature wear and damage to the bearing and the machinery, ensuring long - term reliable operation in the demanding environment of woodworking, where precision and durability are essential for producing high - quality wood products.

V. Dimensions and Specification Parameters

VI. Maintenance Points

6.1 Lubrication Management

Proper lubrication is essential for the optimal performance and extended service life of the 1216 bearing. The selection of lubricant depends on various operating conditions, including temperature, speed, and load. For general applications, high - quality lithium - based grease is often a suitable choice. However, in high - temperature environments (above 120°C) or under heavy - load conditions, synthetic greases or oil - based lubricants may be more appropriate. The lubricant should be applied in the correct quantity, usually filling about one - third to one - half of the bearing's internal space. Regular lubrication intervals should be determined based on the bearing's operating conditions. In normal operating conditions, lubrication may be required every few months, but in more demanding environments, it may need to be done more frequently. The lubricant should be replenished or replaced in a timely manner to maintain its lubricating properties and prevent premature wear of the bearing.

6.2 Regular Inspection

Regular inspection of the 1216 bearing is necessary to detect early signs of wear, damage, or misalignment. Visual inspections should be carried out periodically to check for any visible signs of cracks, corrosion, or abnormal wear on the bearing surfaces. Additionally, vibration and temperature monitoring can be effective methods for detecting changes in the bearing's operating condition. An increase in vibration levels or a rise in temperature may indicate problems such as improper lubrication, excessive load, or misalignment. If any abnormal conditions are detected, the bearing should be thoroughly inspected. This may involve disassembling the bearing (if possible) to examine the internal components more closely. Necessary repairs or replacements should be carried out promptly to prevent further damage to the bearing and the connected machinery.

6.3 Installation Precautions

During installation, it is very important to ensure a clean working environment to prevent dust, debris, and contaminants from entering the bearing. Specialized installation tools should be used to avoid damaging the bearing during the installation process. The bearing should be installed correctly on the shaft and in the housing, with the appropriate fit. For a cylindrical - bore bearing like the 1216, an interference fit is typically used between the inner ring and the shaft to prevent slippage. The interference should be carefully controlled to ensure proper installation without over - stressing the bearing. When installing the outer ring in the housing, a clearance fit is usually recommended to allow for the bearing's self - aligning function. The bearing should also be properly aligned with the shaft and the housing to ensure optimal performance. Any misalignment during installation can lead to uneven loading and premature failure of the bearing.

6.4 Storage Considerations

When the 1216 bearing is not in use, it should be stored in a clean, dry, and well - ventilated area. It should be protected from moisture, corrosive gases, and extreme temperatures. Bearings should be stored in their original packaging or wrapped in anti - rust paper to prevent rusting. They should be placed horizontally to avoid uneven stress on the rolling elements and raceways. Regular checks should be carried out during storage to ensure that the bearings remain in good condition. If any signs of rust or damage are detected during storage, appropriate measures should be taken to address the issues before the bearing is put into use. This may include cleaning, re - lubricating, or replacing the bearing if necessary.