Introduction to the installation and disassembly of NSK bearings

NSK bearing installation

1. Before installing the imported bearing on the shaft, the fixing pin of the bearing shell must be unplugged, and the surface of the journal should be smoothed and cleaned, and the oil is rust-proof and lubricated at the journal (allowing the bearing to rotate slightly on the shaft) .

2. Apply lubricant to the bearing seat and bearing mating surface, and install the bearing into the bearing housing. Then assemble the assembled bearing with the NSK bearing housing on the shaft. Push it to the desired position for installation.

3. Do not tighten the bolts of the fixed bearing housing, so that the bearing housing can rotate in the bearing housing. Also install the other end bearing and seat on the same shaft, turn the shaft a few turns, and let the bearing itself automatically find the position. Then tighten the bearing block bolts.

4. Install the eccentric sleeve. First, eccentric sleeve is placed on the eccentric step of the inner sleeve of the bearing, and tightened by hand in the direction of rotation of the shaft. Then insert or hold the small iron rod into the counterbore on the eccentric sleeve. Iron rod. Make the eccentric sleeve securely fast, and finally lock the hexagon socket screw on the eccentric sleeve.

NSK bearing disassembly:

1. Disassembly of the outer ring

To remove the outer ring of the interference fit, install a few outer ring extrusion screw screws on the circumference of the outer casing, and tighten the screw evenly while disassembling. These screw holes are usually covered with a blind plug, a split-type NSK bearing such as a tapered roller, and a plurality of slits are provided on the outer shoulder of the outer casing, and the spacer is used, disassembled by a press, or gently tapped to remove.

2. Disassembly of cylindrical hole NSK bearing

The removal of the inner ring can be pulled out by the pressure machine. At this point, pay attention to let the inner ring withstand its pulling force. The inner ring of large NSK bearings is dismantled by hydraulic method. Oil pressure is applied through an oil hole provided on the shaft to make it easy to pull. The NSK bearing with a large width is used in combination with the hydraulic chucking method for the disassembly work. The inner ring of the NU type and NJ type cylindrical roller NSK bearings can be removed by induction heating. A method of heating a part in a short time to expand and pull the inner ring.

3, the removal of the tapered hole NSK bearing

Disassemble the relatively small NSK bearing with adapter sleeve, support the inner ring with the block fastened on the shaft, turn the nut back a few times, and use the ram to knock and disassemble. Large NSK bearings are easier to disassemble by hydraulic pressure. The oil is pumped in the oil hole on the taper shaft to expand the inner ring and remove the NSK bearing. In operation, there is a possibility that the NSK bearing suddenly comes out. It is better to use the nut as a block.