Installation method of single row self-aligning roller bearings

The installation method of single row self-aligning roller bearings can vary depending on the specific bearing type, installation environment, and tool conditions. The following are a general installation procedure and detailed instructions for specific installation methods:

1、 General installation steps

preparation

Ensure installation is carried out in a clean environment, or take appropriate measures to protect bearings and installation locations from contamination such as dust, dirt, or moisture.

Check the components in the bearing seat, shaft, and other bearing configurations to ensure they are clean and undamaged.

Check the radial clearance and axial clearance of the bearings to ensure they meet the design requirements.

Heating bearings

For bearings that require hot installation, oil tanks, ovens, tempering furnaces, or inductive heaters can be used to heat the bearings to 80 ° C~100 ° C (oil temperature cannot exceed 120 ° C).

The heating time depends on the size of the bearing and is generally around 30 minutes.

During the heating process, it is necessary to ensure that the bearings are heated evenly and avoid excessive local temperature.

Install bearings

Quickly insert the heated bearing onto the shaft until the inner ring end face of the bearing is in close contact with the shaft shoulder.

For tapered bore self-aligning roller bearings, a tightening sleeve, locking nut, or hydraulic nut can be used for installation.

During the installation process, ensure that the bearings are aligned with the shaft and bearing seat to avoid scratching the bearing raceway and rolling components.

Adjust the clearance

Determine the axial clearance size of the bearing according to the working conditions and adjust it accordingly.

Adjustments can be made using methods such as adjusting nuts, adjusting washers, and pre tightening springs.

After adjustment, use a dial gauge to check the size of the axial clearance to ensure it meets the design requirements.

Locking and lubrication

Install locking devices such as locking nuts, locking washers, or locking clips to ensure that the bearings do not loosen.

Apply lubricating oil or grease on bearings to improve their lubrication performance and service life.

Cover the bearings with plastic film to prevent dust.

2、 Specific installation methods

Install using a tightening sleeve

Place the locking sleeve on the platform and remove the locking nut.

Clean the surface of the shaft and install a spacer ring (if the shaft has a shoulder and a spacer ring is required).

Use a screwdriver to attach the fastening sleeve onto the shaft, insert it into the shoulder of the spacer ring, with the threaded side facing towards the shaft end.

Install the bearing onto the tightening sleeve and secure it with a locking nut.

Use a specialized wrench to tighten the locking nut against the inner ring end face of the bearing until the torque of the wrench increases and stops.

Adjust the axial clearance of the bearing as needed and install locking devices such as locking washers or locking clips.

Install using hydraulic nuts

Place the tightening sleeve and hydraulic nut on the platform.

Clean the surface of the shaft and install a spacer ring (if the shaft has a shoulder and a spacer ring is required).

Install the bearing onto the tightening sleeve and secure it with hydraulic nuts.

Use a specialized wrench to press the hydraulic nut plate against the inner ring end face of the bearing, with the piston in the unloaded position.

Connect the oil pipe of the hydraulic pump to the hydraulic nut, slowly press the control rod of the hydraulic pump to increase pressure until the bearing clearance begins to change.

Record the pressure value of the gauge and the initial measurement value of the radial clearance of the bearing, and determine the recommended residual clearance based on the inner diameter size of the bearing as the installation clearance target value.

Continue to press the control rod of the oil pressure pump to increase pressure, and repeatedly measure the radial clearance of the bearing until the installation clearance target value is reached.

Remove the oil pipe, remove the oil pressure nut, and install the locking device.

Hot installation method

In addition to using oil tank heating, heating equipment such as electric heating plates and electric furnaces can also be used to heat the bearings to 80 ℃~100 ℃.

During the heating process, it is important to ensure that the bearings are heated evenly and to avoid excessive local temperatures.

Quickly insert the heated bearing onto the shaft and follow the general installation steps for subsequent operations.

3、 Precautions

Pre installation inspection

Before installation, carefully check the dimensions, shape tolerances, and fit of components such as bearings, shafts, and bearing seats.

Ensure that the anti-corrosion agent on the inner and outer diameters of the bearing has been removed, and clean the bearing and shaft surfaces.

Alignment during installation process

During the installation process, it is necessary to ensure the alignment accuracy between the bearing, shaft, and bearing seat, and avoid scratching the bearing raceway and rolling components.

Use specialized tools and equipment for installation, avoid using hammers or other tools to directly strike the bearings.

Gap adjustment

Determine the axial clearance size of the bearing according to the working conditions and adjust it accordingly.

After adjustment, it is necessary to use measuring tools such as micrometers to check the size of the axial clearance and ensure that it meets the design requirements.

Lubrication and dust prevention

Apply an appropriate amount of lubricating oil or grease on the bearing to improve its lubrication performance and service life.

Cover the bearings with dust-proof materials such as plastic film to prevent dust and dirt from entering the interior of the bearings.

In short, the installation method of single row self-aligning roller bearings needs to be selected according to the specific bearing type, installation environment, and tool conditions. During the installation process, it is necessary to strictly follow the operating procedures and safety requirements to ensure installation quality and safety.