Determination Method Of Whether Nsk Bearing Should Be Replaced
Determination Method Of Whether Nsk Bearing Should Be Replaced
2021年12月30日
Four Key Points Of Correct Force Application When Assembling And Disassembling Bearings
Four Key Points Of Correct Force Application When Assembling And Disassembling Bearings
2021年12月30日

Inspection Of Thrust Koyo Bearing After Installation

Inspection Of Thrust Koyo Bearing 

When installing the thrust bearing, check the verticality of the shaft ring and the shaft centerline. The method is to fix the dial indicator on the end face of the box shell, make the Inspection Of Thrust Koyo contact of the dial indicator push on the raceway of the shaft ring of the Koyo bearing, rotate the Koyo bearing and observe the pointer of the dial indicator.

If the pointer deviates, it indicates that the shaft ring and the shaft centerline are not perpendicular. Inspection Of Thrust Koyo  When the shell hole is deep, it can also be inspected with an extended dial indicator.

When the thrust bearing is installed correctly, its seat ring can automatically adapt to the Inspection Of Thrust Koyo rolling of the rolling element to ensure that the rolling element is located in the raceway of the upper and lower rings.

Inspection Of Thrust Koyo Bearing After Installation

If it is installed reversely, not only the Koyo bearing does not work normally, but also the mating surfaces will be Inspection Of Thrust Koyo seriously worn. Since the difference between the shaft ring and the seat ring is not obvious, extra care should be taken during assembly.

In addition, a clearance of 0.2-0.5mm shall be reserved between the seat ring of thrust bearing and the seat Inspection Of Thrust Koyo hole of Koyo bearing to compensate for the error caused by inaccurate processing and installation of parts.

When the center of Koyo bearing ring is offset during operation, this Inspection Of Thrust Koyo clearance can ensure its automatic adjustment, avoid contact friction and make it operate normally. Otherwise, the Koyo bearing will be severely damaged.

Installation method of tapered hole bearing in SKF Bearing

Disassembly And Installation Skills Of Iko Bearing

The tapered hole bearing can be directly installed on the tapered journal, or it can be installed on the Inspection Of Thrust Koyo cylindrical journal with the tightening sleeve and disassembly sleeve as the intermediary. However, in any case, the interference of the inner ring of the tapered hole can be measured according to the reduction of the clearance of SKF Bearing.

The reduction of radial clearance is the difference between the radial clearance of SKF Bearing before and after installation. The original radial clearance of SKF Bearing shall be Inspection Of Thrust Koyo measured before installation, and the clearance shall be measured frequently during installation until the radial clearance reduction corresponding to the ideal interference is achieved

The measurement of radial clearance reduction can also be replaced by the measurement of the propulsion of SKF Bearing on conical journal. For the standard taper of 1:12, the reduction of radial clearance is about 1 / 15 of the axial thrust. In this proportion, for the solid shaft, the interference of the mating surface is only 75% ~ 85%, which plays a role in expanding the inner ring.

The reduction of radial clearance of large spherical roller SKF Bearing and cylindrical roller bearing is usually measured with feeler gauge. Note that for spherical roller SKF Bearing, the radial clearance at the two rows of rollers must be measured from the two end faces respectively. Only when the clearance value at the two rows of rollers is the same, can the inner ring and outer ring be relatively positive.

The small tapered hole SKF Bearing cannot be measured with a feeler gauge

because its radial clearance is too small. A dial indicator can be used to contact the shaft or SKF bearing seat to measure the lifting amount during propulsion. At this time, attention is paid to the change of radial clearance, and the elastic deformation of rolling element and raceway is not considered. The force used to push SKF Bearing or bearing seat should be roughly equivalent to their weight.

When the large SKF Bearing is installed into the disassembly sleeve, it can not only greatly save labor, but also is especially suitable for occasions where the position is limited and large hook wrench cannot be used. The specific operations are as follows:

place the hardened gasket s at the end of the disassembly sleeve, gently tighten the nut m, and then evenly tighten the hardened bolts K evenly distributed along the circumference until the required clearance reduction is obtained.

Since the disassembly sleeve is self-locking by the friction of its conical surface, it will not loosen even if the compression device is removed. In this way, the compression nut M can be safely removed and replaced with a fixed nut to compress the disassembly sleeve.

During installation, a very thin layer of lubricating oil must be coated on the mating surface of the return sleeve to reduce friction and facilitate installation. However, be careful not to apply thick oil, otherwise the disassembly sleeve will lose its self-locking ability. When the compression screw and nut are removed to replace the fixed nut, the disassembly sleeve will loosen and deviate from the set position, resulting in installation error.

In addition, in the working process, the lubricant will gradually be squeezed out or escape from the fitting gap, resulting in the loosening of the original interference fit of SKF Bearing.

When the installed SKF Bearing is removed and then installed on the journal

the nut cannot be screwed to the original position as it is, because the original fit of the SKF Bearing System has become loose after a long time of work, which is due to the gradual loosening of the thread, the permanent deformation of the fitting surface due to pressure, and certain wear due to friction. In this case, the radial clearance reduction, axial thrust or expansion must be re measured during installation.

For large bearings, SKF is more convenient for disassembly and installation. For all standard disassembly sleeves and threaded shaft ends, the SKF Bearing can also be installed on the conical journal with piston hydraulic nut, or the disassembly sleeve can be pressed into the predetermined position of the cylindrical journal.

The composition and working principle of the piston hydraulic nut are as follows: with the help of the manual oil pump, the pressure oil pressure is fed into the oil cylinder (nut) through the high-pressure hose, the oil cylinder is fixed on the threaded shaft end with its internal thread,

the extended end of the piston is pushed on the end face of the inner ring of the SKF Bearing, the pressure oil drives the piston to push the SKF Bearing forward along the conical journal, and according to the pressure of the oil pressure gauge in the pipeline, The thrust of SKF Bearing can be roughly judged.

For experienced SKF Bearing installers, try rotating SKF Bearing by hand to sense its operation flexibility, and control the interference of SKF Bearing without instrument measurement, especially for the installation of small conical bore bearing, but it can only be implemented after strict test and no negligence.