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IKO non-standard bearing installation preparation and attention issue
Jan 11, 2018

1, the choice of installation site and requirements

Installation site should be lathe, grinder and other mechanical equipment from a distance. The site should be clean, often keep dry and clean, and prevent iron, sand, dust, moisture into the bearings.

2, test bearing model, ready for installation tools

Test IKO bearing type, size is consistent with the installation requirements, and according to the structural characteristics of non-standard bearings and with each of the components, select the appropriate assembly method, ready for installation tools and measuring tools. Commonly used installation tools Hammer, copper rods, sleeves, special pad, Anemone fixtures, presses, etc., with vernier caliper, micrometer, and dial gauge and so on.

3, test bearing assembly surface

IKO bearing assembly surface and the parts with the surface, such as bumps, rust layer, debris, sand, dust and dirt, a bearing installation difficulties, resulting in the assembly location is not correct; two these attachments to form abrasive, Easy to wear non-standard bearing surface, affecting the assembly quality. Therefore, before installation, the surface of the journal, the housing bore, the shoulder end face, and the mating surfaces of the connecting parts such as bushings, washers, ends etc. shall be carefully inspected. If the rust layer, available file filing, fine sand cloth light, but also to clear the bearing assembly surface and its attached parts of the attachment.

The inner and outer ring separable IKO bearings, do not swap the outer ring mistakes so as not to affect the quality of contact. Non-standard bearings, bearings shall not arbitrarily take out the rolling mix, so as to avoid the installation location confusion affect the accuracy.

When installing IKO bearings, in order to facilitate the inspection bearing code, not safety error, the bearing ring should be placed facing and typing type.

1. Bearing and bearing housing shell hole heating

For the large amount of interference in large and medium-sized bearings, in order to facilitate the installation, must be installed before the heating; tight fit with light metal housing shell holes (such as aluminum bearing), due to low hardness, in order to prevent IKO bearing outer ring pressure When the surface of the bearing housing hole scratch, razor, should also be heated to install. Heating method, the general bearing or separate bearing rings into a clean oil tank, the oil submerged non-standard bearings, uniform heating. When the temperature reached 80-90 ℃, remove the wipe, hot installation. Fuel tank can be made of 2-3mm thick iron plate, 50-70mm from the bottom of the tank plus a porous iron plate, the bearing placed in the porous iron heating. Its purpose is to prevent oil from precipitating impurities into the bearing.

However, bearings with dust caps or seals on both sides cannot be heated in the early stages due to the added lubricant during manufacture.

1 with the choice of rolling bearings

2. Choose the basis for cooperation

According to the role of the load on the bearing relative to the rotation of the ferrule, IKO bearing rings have three kinds of load: partial load, cyclic load, swing load. Usually cycle load (rotating load), the use of tight load swing fit; local load in addition to the use of special requirements, the general should not be used with tight fit. When a non-standard bearing ring to withstand the dynamic load and is heavy load, the inner and outer rings should be used with interference fit, but sometimes the outer ring can be a little loose, should be able to axial movement in the housing hole; When the bearing ring to withstand the swing load and light load, you can use a slightly loose fit than the tight fit.

3, the size of the load

The interference between IKO bearing ring and shaft or shell hole depends on the size of the load. When the load is heavier, the interference between the IKO bearing ring and the shell hole is larger, and the smaller interference is used when the load is lighter. General radial load P is less than 0.07C for light load, P is greater than 0.07C and equal to or less than 0.15C when the normal load, P is greater than 0.15C heavy load (C is the bearing dynamic load rating)