Self aligning roller bearings for agricultural machinery are widely used in transmission, support and other parts of agricultural machinery due to their excellent self-aligning performance and load-bearing capacity. To ensure its efficient and stable operation and extend its service life, the following precautions should be taken during use:
1. Preparation before installation
Environmental cleaning
Thoroughly clean the installation area before installation to prevent dust, metal shavings and other impurities from entering the bearing interior, and to prevent early wear or seal failure.
Use clean cloth or specialized tools to clean the bearings, shaft necks, and bearing seats, ensuring no oil stains, rust, or burrs.
.Component inspection
Check whether the bearing model and size match the design requirements of the agricultural machinery to avoid installation failure or abnormal operation caused by misuse.
.Confirm that the dimensional accuracy and surface roughness of the journal and bearing seat holes meet the requirements to prevent excessive or insufficient bearing clearance due to improper fit.
.Tool Preparation
Use specialized installation tools (such as hydraulic press, heater, copper rod, etc.) to avoid directly tapping the inner or outer ring of the bearing to prevent deformation or damage.
. Prepare measuring tools such as torque wrenches and feeler gauges to ensure that the installation torque and clearance meet the specifications.II. Installation Process Specification
Heating Installation
For bearings with interference fit, heating installation method (such as oil bath heating or induction heating) can be used, and the temperature should be controlled at 80-120 ℃ to avoid bearing annealing or seal aging caused by high temperature.
. After heating, quickly insert the bearing into the journal and lightly tap the inner ring end face with a copper rod to ensure even fit and prevent local jamming. Gap AdjustmentAfter installation, check the bearing clearance to ensure it meets the design requirements.
. Excessive clearance can cause vibration and noise, while insufficient clearance may lead to overheating or jamming. For bearings that require pre tightening (such as tapered roller bearings), adjust the pre tightening force according to the instructions to avoid excessive pre tightening and increased friction.Sealing Protection
During installation, pay attention to protecting the sealing components (such as rubber sealing rings) to avoid scratches or distortions and ensure sealing performance.
. For open bearings, apply an appropriate amount of lubricating grease to the outer ring surface after installation to prevent dust from entering.III. Lubrication Management
Lubricant Selection
Choose the appropriate grease or lubricant based on the working environment of the agricultural machinery (such as temperature, humidity, dust).
. For example, high-temperature environments require the use of high-temperature resistant lubricating grease, while humid environments require the use of lubricating grease with good waterproof performance.Avoid mixing lubricants of different brands or models to prevent chemical reactions from causing lubrication failure.
.Lubrication cycle
After the first 50-100 hours of operation of the newly installed bearing, the lubricating grease needs to be replaced, and then it should be replaced every 500-1000 hours or regularly according to the strength of use.
. Under harsh working conditions such as high load and high dust, it is necessary to shorten the lubrication cycle to ensure sufficient lubrication.Lubrication control
The filling amount of lubricating grease is generally 1/3-1/2 of the internal space of the bearing. Too much will cause heating, while too little will prevent the formation of an effective oil film.
.For centralized lubrication systems, regularly check whether the oil circuit is unobstructed to avoid local oil shortages.
.IV. Operation Monitoring and Maintenance
Temperature Monitoring
Regularly check the bearing temperature during operation, and the normal operating temperature should be below 80 ℃.
. If the temperature rises abnormally (exceeding 100 ℃), the machine should be stopped immediately to check the lubrication, installation, or load condition.Vibration and Noise
Monitor the sound of bearing operation. Abnormal noise (such as metal friction sound, knocking sound) may indicate insufficient lubrication, improper installation, or internal damage.
.Use a vibration analyzer to regularly detect bearing vibration values and detect early faults in advance.
.Regular inspection
Check the appearance of bearings, seals, and connecting components every quarter or every operating cycle, clean external dirt, and tighten loose bolts.
.For open bearings, check whether the lubricating grease has deteriorated or is missing, and replenish or replace it in a timely manner.
.Fifth, Common Problem Handling
Bearing Overheating
Causes: Insufficient lubrication, small clearance, installation tilt, and excessive load.
.Treatment: Supplement lubricating grease, adjust clearance, reinstall, and reduce load.
.Abnormal noise
Causes: damage to the raceway or rolling elements, poor lubrication, and foreign object intrusion.
.Treatment: Replace bearings, improve lubrication, and clean impurities.
.Sealing failure
Causes: aging of seals, installation damage, chemical corrosion.
.Treatment: Replace seals, avoid contact with corrosive substances, and standardize installation operations.
.VI. Storage and Handling
Long term storage
Bearings should be stored in a dry, ventilated room to avoid contact with corrosive substances such as acids and alkalis.
. Horizontal placement, regularly rotate the outer ring to prevent rust, and re lubricate if the storage period exceeds 1 year.Handling precautions
Avoid severe vibration or collision during handling to prevent bearing deformation or damage.
. Do not drag bearings directly on the ground to prevent scratching the surface.