SKF Tapered Roller Bearings – Mounting and dismounting
SKF Tapered Roller Bearings – Mounting and dismounting

This SKF training film is about tapered roller bearings A tapered roller bearing consists of two separate parts An inner ring complete with a set of tapered rollers secured by pressed steel cage called the cone assembly and an outer ring called the cup The cup and cone are mounted separately The cup in the housing and the cone on the shaft Only when they are assembled together do they form a complete bearing Because tapered roller bearings can only carry loads in one direction they must be used in pairs opposed to one another and adjusted together and secured by a lock nut Tapered roller bearings a suitable for carrying combined radial and axial loads Depending on the application they can be assembled in back to back or face to face configurations When mounting these bearings they must always be assembled opposed to each other They are particularly robust and are used where heavy loads and moderate speeds apply This film shows the mounting and dismounting of an industrial tapered roller application similar to that of a truck wheel In this application the cups are an interference fit in the housing and clearance fit for the cone assemblies on the shaft as this is a rotating outer ring application This makes it easier to adjust the bearings The tapered roller bearings are commonly used in applications like industrial gearboxes, highway equipment and truck wheels For the mounting of tapered roller bearings first fit both the cups into the housing using the SKF fitting tool kit One of the cone assemblies is then placed in its matching cup already in the housing and the end cap is secured If the bearings are grease lubricated it should be done at this stage The bearing should be kept in its protective package to the actual mounting takes place The housing assembly is placed on the shaft and whilst partially supported fit the second cone assembly Fit the retaining washers and hand tighten the lock nut When adjusting tapered roller bearings it is important to rotate the bearings while hand tightening the nut This will effectively seat the rollers onto the cone flange ensuring correct adjustment is achieved This application is to be adjusted with a small amount of axial clearance The most common way of measuring the axial clearance is with a dial indicator It is necessary to rotate then push and pull the assembly to determine the clearance value The lock nut is adjusted to achieve the required axial clearance Depending on the application preload or clearance values may be required Refer to the machine manual for the specific adjustment value Secure the lock nut with the lock washer tap A final clearance check is required before greasing and fitting the remaining and cap Remember the degree of clearance is set on assembly and not at the manufacturing stage of the bearing Another type of tapered roller set up is when a pair of complete bearings are carefully measured and appropriate space is made to give the required clearance or pre-load between them This is usually done at the manufacturing stage It is essential that the spacers and bearings are kept together as a unit Unlike the individual tapered roller bearing the cup and cone assemblies a matched sets and must not be mixed In this application the inner rings and spacer are clamped tight against the shoulder on the shaft When mounting taper roller bearings make sure they are always assembled opposed to each other The wrong configuration can cause severe damage to the equipment To dismount tapered roller bearings use the fitting procedure in reverse After removing the end cap drive back the lock washer tab and unscrew the lock nut The tapered roller assembly can now easily be removed from the shaft Tapered roller bearings can be adjusted with either axial clearance or pre-load When tightening the lock nut the axial clearance in the application is reduced Continued tightening of the lock nut at this stage will pre-load the application To achieve the correct torque measurement refer to the machine manual Heavy pre-load will reduce bearing life and too much clearance will cause excessive shaft movement and damage the application

3 thoughts on “SKF Tapered Roller Bearings – Mounting and dismounting”

  1. Ha Lin says:

    How can i learn about bearing designation number?It seems a bit difficult for me.

  2. Calvin Engler says:

    wow very good!

  3. Ufine Bearing says:

    we are bearing supplier .ask me ,..whatsapp 008613791051960

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