Eric Bearing LTD has enough stock for FAG QJ306 bearing

For bearings deployed in the agriculture sector there is no shortage of potential hazards, including moisture, soil dust, corrosive fertilisers and very high shock loads (such as those generated by stone chipping). However, the robust bearing design and highly effective sealing of NSK Agri Disc Hubs makes them a proven choice in extreme operating conditions. Manufactured in Germany, these innovative units are a popular choice for common farming implements such as short disc harrows, seed drills and flail mowers.Extremely harsh working conditions, along with high-pressure washing routines, place a raft of demands on the bearings and seals found in equipment for the agriculture industry. A low-quality bearing will not be sufficiently robust in its design or performance levels to provide the uptime necessary for reliable and productive operation. Instead, frequent downtime and costly failures will be the likely result.

NSK’s solution to this challenge is the Agri Disc Hub, a cost-effective, self-lubricating bearing unit that delivers a number of major benefits to users of farming implements. High-performance Agri Disc Hubs feature double-row angular-contact ball bearings that can support high axial and radial loads, while the meticulously devised configuration locates the bearings within a sturdy housing that connects directly (and simply) to the implement via an integrated flange.

Importantly, NSK can offer fast, Europe-wide availability of Agri Disc Hubs as manufacturing takes place in Germany. The Munderkingen facility can boast almost 70 years of high-quality production output.
Alongside high-performance bearing technology, Agri Disc hubs are equipped with a highly effective sealing system for robust protection against extreme condition applications. This comprehensive system is a combination of labyrinth and contact seal designs, which serves to prevent both the ingress of contaminants and the escape of grease. ‘Greased for life’ Agri Disc Hub bearings provide users with maintenance-free operation.

The innovative design of the bearings and sealing system significantly increases service life. Even under extreme stress, Agri Disc Hub bearings – and thus the implement which they serve – grant a service life that is several times beyond that of other commercially available solutions, while their modularity means they can be adapted very quickly to individual user requirements. In such instances, flexible manufacturing at the Munderkingen plant ensures rapid deliveries at competitive costs, even more so for custom requests.

FAG 21317E.TVPB bearing

Heat treatment process method:


Through the adjustment and control of process parameters such as quenching, cleaning, tempering temperature and time, the content of retained austenite in the bearing ring is reduced, the strength and toughness and wear resistance of the bearing ring parts are improved, and the expansion coefficient is controlled. Within the required range, it can improve the noise performance of the bearing after multiple installations, and also improve the reliability and service life of the bearing;


Using the structural characteristics of the mesh belt furnace, through the adjustment and control of the quenching temperature and oil temperature, the thermal stress of the bearing ring parts during quenching can be reduced, which can greatly reduce the deformation of the thin-walled and large-size bearing ring parts;


Preparatory heat treatment methods such as normalizing and high temperature tempering can also be used to make up for the gap with foreign bearing steel materials, which has a certain effect on improving the reliability and life of the bearing, but it will increase some production costs. The company uses it when conditions permit. It can also be used as an emergency method;


Adopt advanced heat treatment processes such as carburizing, carbonitriding, cold treatment, ion implantation, surface coating, intermediate frequency quenching, bainite austempering, etc., which can significantly improve the impact toughness, microhardness and contact fatigue of bearing ring parts Life, wear resistance and service life, the company can use these heat treatment technologies to develop new bearing products when conditions permit;


Four sets: "Determining operators, heat treatment equipment, process regulations, and work instructions" is an important measure for the quality assurance of heat treatment of bearing ring parts. Only operators strictly follow the process regulations and work instructions. In order to ensure the heat treatment quality of the bearing ring parts;


Standardize, standardize, and simplify the complex heat treatment technology, and strive to be concise and easy to understand in the preparation of the process regulations and work instructions, so that the heat treatment operator understands how to do the work and how to do it well.

FAG 21319EK.TVPB bearing

At present, the equipment that uses precision bearings is becoming more and more refined, and the grease used in NSK bearings must have the following functions:

(1) With the same operating life as the bearing, the maintenance cycle should be delayed as much as possible, the downtime should be shortened, and the labor productivity can be improved.

(2) At a high speed of dn>5×105, it is necessary to ensure that the temperature rise of the motor is low and oil is not dumped, thereby reducing power consumption and protecting the motor.

(3) Its scalar content control is under the inevitable standard, and the pollution of the equipment noise to the situation is minimized.

(4) Under the premise of ultra-low temperature work, it guarantees the flexibility of starting and running of bearings, common problems of NSK bearings. Guaranteed minimum output power.


The cleaning of the removed NSK bearings is divided into rough cleaning and fine cleaning, and they are placed in the container, and the metal mesh pad is placed first so that the bearing does not directly contact the dirt of the container. During rough cleaning, if the bearing is rotated with dirt, it will damage the rolling surface of the bearing, and it should be noted. In the coarse cleaning oil, use a brush to remove smooth grease and adhesions. After roughly cleaning, transfer to fine washing.