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PNEUMATIC BEARING PULLER

ABSTRACT

This project is deals with design and fabrication of a pneumatic bearing puller,

which is used for removing bearings from the shaft and the bearing cup with the help of a

compressor.

Initially the bearing shaft is held between two fixtures. The compressed air is

passed to the direction control valve. The top fixture is moves towards downwards, so

that the bearing is removed from the shaft.

INTRODUCTION

The pneumatic bearing puller is used to removing the bearings in the shaft by

holding the bearing shaft in between two fixtures. One of the fixtures is movable and the

other one is fixed. The principle of operation is the same as the conventional simple

press. The difference is being only in the type of drive and the type of fixtures used.

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The pneumatic bearing puller is used to removing bearings in the shaft up to alength of 600mm. In the pneumatic bearing puller the main thing being the pressure

developed is done with the help of a compressor. The air in that compressor is passed

to the double acting cylinder through the control valves. There are two types of

control valves used in this press. One is flow control valve and another one is the

direction control valve.

When the compressed air is passed to the flow control valve, the required

speed of the piston is obtained by adjusting its knob. When the air is passed to the

direction control valve, the up/downward movement of piston is controlled by the

hand liver. The bearing shaft is connected to the top fixture. A bottom fixture is

fixed on the bottom plate by using bolts and nuts.

Bearing Removing procedure:

The shaft is kept vertically between the bottom fixture and top fixture. The bearing

shaft is kept in the top of the fixture. The remaining portion of the shaft touches the

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1. It reduces the manual work2. It reduces the production time

3. Uniform application of the load gives perfect removing of the bearing.

4. Damages to the bearing due to the hammering is prevented

5. It occupies less floor space

6. Less skilled operator is sufficient

DISADVANTAGES

1. Initial cost is high

2. Cylinder stroke length is constant

3. Need a separate compressor

APPLICATIONS

Bearing Pressing Operation in all industries

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