**Bearing Oil Supply Methods and Oil Quantity Calculation** Home > Bearing Knowledge > Bearing Oil Supply Method and Oil Quantity Calculation var cpro_id = "u3440131";

Bearing Oil Supply Method and Oil Quantity Calculation

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The amount of oil required for smooth operation of rolling bearings depends largely on the bearing type, oil supply system design, type of lubricant, and other factors. It is challenging to provide a general formula that applies universally. However, there are some commonly used methods and guidelines that can help in determining the appropriate oil quantity. For example: - **B**: Bearing width (in mm) - **d**: Bearing inner diameter (in mm) Based on these dimensions, an initial calculation can be made. However, in practice, the actual oil supply should be increased by 4 to 20 times this value to ensure proper lubrication. To achieve the best performance, it is recommended to conduct tests and adjust the oil supply accordingly. Bearings with active fluid transmission, such as angular contact ball bearings, typically require more oil compared to those without, like double-row cylindrical roller bearings. This difference becomes even more pronounced at higher speed coefficients (n × dm). Through extensive testing, the following formula has been established: **Q = W × d × B** Where: - **Q** = Oil supply (in mm³/h) - **W** = Coefficient (approximately 0.01 mm/h) This method is particularly suitable for high-speed bearings, where it's essential to reliably deliver the lubricant into the bearing. The choice of oil supply method—such as nozzle feeding or directional positioning—should be carefully considered based on the bearing type and application. It is best to use a specialized nozzle to direct the lubricant into the bearing. The length of the nozzle should be around 0.5 to 1.0 mm, depending on the bearing size. Additionally, lubricant should also be directed toward the outer ring of the bearing. For single-row bearings, the optimal method is to inject the lubricant from one side. The nozzle should be aligned with the inner raceway and should not point toward the cage. Especially for bearings that are difficult to maintain in a specific direction (like angular contact ball bearings), the oil must enter the bearing properly to reach the contact area between the balls and the outer ring. When the bearing outer diameter is between 150 and 280 mm, it’s advisable to add a nozzle for better lubrication. For double-row bearings, the lubricant should be sprayed directly onto the outer raceway to ensure smooth operation. To prevent oil sludge buildup at the bottom of the bearing, a drain pipe should be installed. Its length should be greater than 5 mm. These considerations are influenced by factors such as the type of lubricant, lubrication method, bearing type, and installation setup. Modern machine tools require high-speed spindles to operate efficiently, which demands precise and reliable lubrication systems. Further detailed discussions on the parameters of oil-gas lubrication systems are necessary to meet these advanced requirements. --- **Related Bearing Knowledge** Common terms and definitions for rolling bearing equipment and sub-assemblies (1) NSK imported bearing, one-way bearing ferrule processing process, nano-ceramic bearing, smoothness of the rolling mill bearing during grinding This article is linked from http:// Please cite China Bearing Network: http:// Previous: Progressive INA Outer Spherical Bearing Work Accuracy Related Information – “Functional Inventory” Next: NSK Bearing Timing Viewing Method

Wiper Seals

Wiper Seals are a type of mechanical seal commonly used to protect piston rods and pistons in hydraulic and pneumatic equipment. The main function of Wiper Seals is to prevent dust, dirt, and other impurities from entering the interior of the equipment, thereby protecting the sealing performance of the piston rod and piston, and extending the service life of the equipment.

Wiper Seals are typically made of elastic materials such as polyurethane, nitrile rubber, fluororubber, etc. These materials have excellent wear resistance and chemical resistance, and can maintain stable performance in various harsh environments.

Wiper Seals are typically divided into two types: unidirectional and bidirectional. Unidirectional Wiper Seals can only prevent dirt and impurities from entering the device from one direction, while bidirectional Wiper Seals can simultaneously prevent dirt and impurities from entering the device from both directions.

Wiper Seals can also be customized according to different application requirements. For example, for high-speed rotating devices, special Wiper Seals can be used to ensure that they do not generate excessive heat and friction during high-speed rotation. For equipment used in harsh environments, special materials such as corrosion-resistant, high-temperature resistant, and low-temperature resistant Wiper Seals can be used.

In summary, Wiper Seals are in dispensable mechanical seals in hydraulic and pneumatic equipment, and their excellent performance and reliable sealing performance provide important guarantees for the normal operation of the equipment. If you need a Wiper Seals product, you can contact a professional seal manufacturer to customize the appropriate Wiper Seals for your device according to your specific needs.

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