Home > Tech > How to properly disassemble and install FAG bearings

How to properly disassemble and install FAG bearings

wallpapers Tech 2021-03-12
Disassembly steps
1. Loosen the bolts that secure the bearing seat. Remove the imported German FAG bearing together with the bearing seat from the shaft. Note that before removing the German FAG bearing seat at one end of the shaft. The I-bearing seat bolt at the other end of the shaft should be loosened to avoid damage to the bearings at both ends.
2. First use an Allen key to loosen the locking screw on the eccentric sleeve of the German FAG bearing, then insert a small iron rod into the counterbore on the eccentric sleeve of the top cover, and loosen the eccentric sleeve against the direction of rotation of the shaft.
Install correctly
Many people use improper installation methods in the installation of bearings, resulting in damage to the German FAG bearings. So how to install the bearing correctly? I hope everyone has a more comprehensive understanding of bearing installation and disassembly:
Forbearing rings with clearance fit, it is recommended to coat the mating surface with a thin layer of anti-creeping corrosion agent to prevent friction corrosion between the mating surfaces.
The 390000 series outer spherical bearing fixes the inner ring of the bearing with the shaft through an eccentric sleeve, and the hexagon socket screw on the eccentric sleeve plays the role of fastening. In the maintenance, many operators will not disassemble and assemble this kind of German FAG bearings, so it is necessary to introduce the technical points and precautions for disassembly and assembly of the 390000 series outer spherical bearings:
When installing, you can choose mechanical, heating, or hydraulic methods according to their type and size. The force exerted on the bearing during installation must not be transmitted from one bearing ring to another German FAG bearing ring through the rolling elements, otherwise, it may cause damage to the raceway. But under any circumstances, it is not allowed to directly knock the bearing ring, cage, rolling element, or seal.
1. Install eccentric sleeve. First, put the eccentric sleeve on the eccentric step of the German FAG bearing the inner sleeve, and tighten it by hand in the direction of rotation of the shaft. Then insert the small iron rod into or against the counterbore on the eccentric sleeve. Knock the small iron rod along the axis of rotation with a hand hammer. Install the eccentric sleeve firmly, and finally tighten the hexagon socket screws on the eccentric sleeve.
2. Do not tighten the bolts for fixing the German FAG bearing seat, but allow the bearing housing to rotate in the bearing seat. Then tighten the bearing seat bolts. Also, install the bearing and seat on the other end of the same shaft, rotate the shaft a few times, and let the German FAG bearing automatically correct its position.
3. Apply lubricating oil on the mating surface of the bearing seat and the bearing, and install the German FAG bearing into the bearing seat. Then put the assembled bearing on the shaft together with the German FAG bearing seat. Push to the desired location for installation.
4. Before installing the German FAG bearing on the shaft, you must first unplug the fixed pin of the bearing housing, and at the same time, polish the journal surface smooth and clean, and apply oil to the journal to prevent rust and lubricate (allow the bearing to rotate slightly on the shaft).

Say something
  • All comments(0)
    No comment yet. Please say something!