1. Radial load of bearing
The bearings that mainly bear radial loads are radial bearings. The nominal contact angle a0 of this type of bearing is less than or equal to= 45 0="" br=""> N-type and NU type cylindrical roller bearings can only withstand radial loads, while other types of radial bearings can withstand both radial and axial loads< br /> 2. Axial load of bearings
The bearings that mainly bear axial loads are generally thrust bearings, with a nominal contact angle a0>; 450. Thrust bearings and thrust angular contact ball bearings can simultaneously withstand axial forces in one or two directions depending on their structure. When subjected to particularly high axial forces, it is preferable to use thrust cylindrical roller bearings and thrust self-aligning roller bearings< br /> Thrust self-aligning roller bearings and unidirectional thrust angular contact ball bearings can simultaneously withstand axial and radial loads, while other thrust bearings can only withstand axial loads< br /> 3. Compensation for the length of the bearing itself
The structure of supporting a shaft and bearing usually adopts a combination of fixed bearings and floating bearings. The length error and thermal expansion of the compensating shaft of the moving bearing< br /> NU and N-type cylindrical roller bearings are ideal moving bearings that can compensate for length on their own. The inner and outer rings of the bearing can be tightly fitted< br /> Length compensation for sliding fit
Non separable bearings (such as deep groove ball bearings and self-aligning roller bearings) can also be used as traveling bearings. One of the two rings of this type of bearing is matched and does not have an axial fixing surface. Therefore, a ring of the bearing can move on its bearing surface< br /> 4. Separable bearings (accuracy)
This is a type of bearing where the rings can be installed separately, and its advantages are particularly prominent when both rings are tightly fitted< br /> Separable bearings include four point contact ball bearings, double half inner ring double row angular contact ball bearings, cylindrical roller bearings, tapered roller bearings, thrust ball bearings, thrust cylindrical roller bearings, and thrust self-aligning roller bearings< br /> Here we also introduce a type of non separable bearing:). Non separable bearings include deep groove ball bearings, single row angular contact ball bearings, self-aligning ball bearings, Peng shaped roller bearings, and self-aligning roller bearings< br /> Accuracy
In most cases, using rolling bearings of general size and rotational accuracy is sufficient. When higher requirements are needed, bearings require higher precision levels, such as machine tool spindle bearings< br /> 5. Non neutral compensation
Non neutrality occurs when machining the mating surface of the shaft neck or bearing seat, especially when the machining of the mating surface is not completed in one assembly. Misalignment can also occur when using a bearing seat, such as a flanged bearing seat or a vertical bearing seat. When the work load causes the shaft to bend and deform, resulting in the inclination of the inner and outer rings of the bearing, misalignment can also occur< br /> Self aligning bearings can compensate for misalignment and tilt, such as self-aligning ball bearings, tapered roller bearings, radial and thrust self-aligning roller bearings. These types of bearings have a concave spherical outer raceway, where the rolling elements and inner ring can rotate inside. The ability of these bearings to compensate for shaft center deflection angle depends on their own type, size, and load conditions< br /> Both outer spherical bearings and thrust ball bearings with seat rings have a spherical bearing surface: when installed in a concave spherical seat ring, the compensating deflection angle can be adjusted< br /> Speed
The friction of a single row bearing is particularly low, so it can achieve * * speed. This type of bearing includes deep groove ball bearings that can only withstand radial loads and angular contact ball bearings that can withstand combined loads< br /> Improving the dimensional accuracy, rotational accuracy, and fitting accuracy of bearings can be achieved through the use of lubrication and cooling methods, as well as the use of special forms of retaining frames to increase the allowable rotational speed of bearings< br /> Low noise operation
Small motors, office equipment, and household appliances generally require noise levels during operation< br /> 6. Conical hole
Bearings with conical holes can be directly installed on conical shaft necks (such as single row and double row cylindrical roller bearings in high-precision structures). When installing such bearings, the given radial clearance can be adjusted< br /> Most self-aligning ball bearings, drum roller bearings, and self-aligning roller bearings with conical holes can be installed on cylindrical shaft necks through a tightening sleeve. This type of bearing is particularly easy to install and disassemble< br /> 7. Stiffness
The stiffness of a bearing usually refers to the force required to induce a certain degree of elastic deformation in the bearing. The bearings on the machine tool spindle and pinion shaft require high stiffness. Due to the different contact conditions between rolling elements and raceways, the stiffness of roller bearings is higher than that of ball bearings< br /> 8. Friction
In addition to being heated and dissipating heat, internal friction also plays a significant role in determining the operating temperature of bearings. Low friction bearings include deep groove ball bearings that can withstand radial loads, single row angular contact ball bearings, and cylindrical roller bearings with retainers. Contact sealed bearings, fully loaded cylindrical roller bearings, and thrust roller bearings all generate significant frictional forces.