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How to install the combined needle ball bearing correctly?

2,976 Published by admin Aug 02,2021

The combined needle ball bearing is a bearing unit composed of radial needle roller bearings and thrust bearing components. It has a compact structure and small size, high rotation accuracy, and can bear a certain axial load while bearing a high radial load. And the combined needle ball bearing has various structures, wide adaptability and easy installation. Combined needle roller bearings are widely used in various mechanical equipment such as machine tools, metallurgical machinery, textile machinery and printing machinery, and can make the mechanical system design very compact and dexterous.

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Installation combination needle ball bearing
For the combined needle ball bearing, when installing, apply a thin layer of grease to the rolling surface of the shaft or housing hole first, and place the roller needles close to the grease on the installation site in turn. There should be a gap when placing the last needle. The gap should be 0.5mm on the circumference of the needle bearing.

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It is not possible to hard squeeze the last needle in, or install one less needle, because the combined needle ball bearing will be stuck and unable to rotate during hard squeezing; when it is installed less, the gap will be too large, which will easily cause the bearing to run. The needle is twisted and broken.

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When installing the combined needle ball bearing, first apply grease to the inner surface of the outer ring of the bearing, and place the needle against the inner surface (there should be a gap when the last needle is inserted), and then replace the journal or bearing The auxiliary roller or auxiliary sleeve of the ring is pushed into the outer ring hole, and the end face is aligned with the end face of the mounting shaft or the end face of the inner ring of the bearing that has been installed on the shaft, and then tapped with a press or a hand hammer to apply pressure.

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The combined needle ball bearing can also be installed in this way, that is, apply a thin layer of lubricating oil to the outer diameter of the auxiliary sleeve and insert it into the outer ring of the bearing, so that the auxiliary sleeve and the outer ring of the bearing form an annular hole, and then install a needle in the annular hole . After installing the needle roller, use the working shaft to push out the auxiliary sleeve.

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