Bearing lubricant Calculation: Rolling bearing lubrication required depends on the type of fuel, fuel system design, factors such as the type of lubricating oil to a large extent. Difficult to give an appropriate any case, no broad applicability of simple formulas.

B-- bearing width, mm

d-- bearing diameter, mm

However, the actual amount of oil would also expand from 4 to 20 times this value basis. For best lubrication effect, the need to modify the experiment by how much amount of oil.

Automatic transmission fluid having a bearing function (such as angular contact ball bearings) is greater than the required amount of oil does not have the automatic transmission function of oil bearing (double-row cylindrical roller bearings) of the desired volume. Especially when the speed coefficient (n.dm) value is large, the difference is more obvious. Through a lot of experiments, fuel quantity Q is roughly calculated as follows: Oil supply Q = WdB where Q-- fuel supply, mm3 / h
W-- coefficient, 0.01mm / h

Fuel method designed for high-speed rotation of the bearing, in order to reliably lubricating oil into the interior of the bearing, it should attach great importance to the oil supply means (such as in the form of a nozzle, installation location, etc.) design. Bearing lubrication depends entirely on the bearing type and configuration.

If conditions permit, the best lubricant through a special nozzle and then into the interior of the bearing. Depending on the size of the bearing length of the nozzle, having a diameter of 0.5 ~ 1.0mm. Also allows the lubricating oil to the outer ring of the bearing.

For single row bearings, the best way to lubricate from one side into the interior of the bearing. Nozzle hole should be flush with the inner ring, can not point to the cage. Especially when the bearing itself is not easy to determine the direction of the oil suction (such as angular contact ball bearings), the oil must be according to the above direction into the interior of the bearing.

In this case, pay attention to whether lubricant into the pressure zone is formed between the ball and the outer ring. When the bearing outer diameter ranging from 150 ~ 280mm, we need to add a nozzle. Double row bearings, the oil must be from the outer ring raceway edge flush sprayed into place inside the bearing to the bearing sufficient lubrication.

In addition, in order to prevent the formation of oil residue at the bottom of the bearing precipitate, we need to install a drain line having a length greater than 5mm. This is because: lubricant type, lubrication method, the amount of lubrication and bearing type, bearing arrangement and other factors to improve the speed of the bearing has a decisive role. In order to meet the modern high-speed machine tool spindle lubrication system requirements for oil - gas centralized lubrication system parameters have to be further detailed and accurate research.