1. Cold installation
When installing a small bearing that is not too tight, you can use a sleeve and hammer it to gently tap the sleeve to install the bearing into the appropriate position. When knocking, the impact should be as even as possible on the bearing ring to prevent the bearing from tilting or skewing.
Most bearings are installed using the press-fit method. If you want to install the inner and outer rings of the bearing on the shaft and the bearing seat at the same time, you must ensure that the same pressure acts on the inner and outer rings at the same time, and the contact surface with the installation tool must be on the same plane.
2. Hot installation
Typically, mounting of larger bearings without heating the bearing or housing is not possible because as the size increases, the greater the force required for mounting. The temperature difference between the bearing ring and the shaft or bearing seat required for hot installation mainly depends on the interference amount and the diameter of the bearing fit. The temperature at which open bearings are heated must not exceed 120°C. It is not recommended to heat bearings with seals and dust caps above 80°C (make sure the temperature does not exceed the allowable temperature of the seals and grease).
When heating the bearing, it must be heated evenly and there must be no local overheating.
二、Tapered bearing installation
1.Most of the inner rings of bearings with tapered holes are installed with an interference fit. The amount of interference is determined by the axial advancement distance of the inner ring on the conical shaft diameter, adapter sleeve or withdrawal sleeve. The greater the advance distance on the conical mating surface, the smaller the radial internal clearance of the bearing. The amount of interference can be determined by measuring the clearance reduction or the axial advance distance.2.For small and medium-sized bearings, you can use a bearing installation tool or preferably a locking nut to push the inner ring into the appropriate position on the conical shaft diameter. When using an adapter sleeve, use a socket nut that can be tightened with a hook or impact wrench. Use the bearing installation tool or the end plate to push the withdrawal sleeve into the bearing inner hole.
3.Larger bearings require greater force to install, so hydraulic nuts should be used. The hydraulic nut can install the tapered bore bearing on the tapered shaft diameter, the adapter sleeve, and the withdrawal sleeve.
4.Oil injection method
The working principle of the oil injection method is: hydraulic oil passes through the oil holes and oil grooves under high pressure and is injected into the mating surface between the bearing and the shaft diameter to form an oil film. The oil film separates the mating surfaces, greatly reducing friction between them. This method is usually used when the bearing is mounted directly on the conical shaft diameter. The necessary oil holes and grooves should be part of the overall shaft design. If the adapter sleeve and withdrawal sleeve have been machined with oil holes and oil grooves, this method can also be used to install the bearing on the adapter sleeve or withdrawal sleeve.
四、Note
1.Bearing installation should be done in a dry, dust-free area as far as possible, and should be kept away from equipment that generates metal debris and dust. When it must be installed in a complex environment, contamination should be minimized.
2.When installing bearings, mechanical, heating or hydraulic methods should be selected according to type and size.