A: 1. Installation of full-loadneedle roller bearingsis usually carried out using an auxiliary sleeve. The auxiliary roller or auxiliary sleeve supports the needle roller so that the needle does not fall out. The journal raises the needle with its own chamfer. As the needle bearing moves slowly inward on the journal, the auxiliary roller or auxiliary sleeve The canister is slowly withdrawn until it is installed in the working position. The outer diameter of the auxiliary roller and auxiliary sleeve should be 0.1-0.3mm smaller than the shaft diameter.
2. Needle roller bearings can also be installed by coating a thin layer of lubricant on the outer diameter of the auxiliary sleeve and inserting 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 installing a needle in the annular hole. After the needle roller is installed, the auxiliary sleeve can be pushed out with the working shaft.
3. For needle roller bearings without an inner ring or outer ring, when installing, you can first apply a thin layer of grease to the rolling surface of the shaft or housing hole, and place the needle roller in close contact with the grease on the installation site. When placing the last needle, there should be a gap. The gap should be 0.5mm on the circumference of the needle bearing.
4. For needle roller bearings with stamped outer ring, because the outer ring wall is very thin, do not hit it with a hand hammer for installation, it should be pressed in with a press. Because when the hand hammer strikes, the pressure is uneven, and the outer ring of the needle roller bearing is easy to be deformed locally.