How Many Types Of Bearing？
Needle roller bearings are equipped with thin and long rollers (roller length is 3~10 times of the diameter, and the diameter is generally not more than 5mm), so the radial structure is compact, and its inner diameter size and load capacity are the same as other types of bearings, and the outer diameter is the smallest, which is especially suitable for the support structure with restricted radial installation size. Needle roller bearing according to the use of different occasions, can choose no inner ring bearings or needle roller and cage assembly, then with the bearing with the journal surface and shell hole surface directly as the bearing of the inner and outer rolling surface, in order to ensure the load capacity and running performance with the sleeve bearing the same, shaft or shell hole raceway surface hardness, machining accuracy and surface quality should be with the bearing sleeve. Combined needle roller bearing is a combination of radial needle roller bearing and thrust bearing components bearing unit, its compact structure and small volume, high rotational accuracy, can withstand a high radial load at the same time to bear a certain axial load. And the product structure form various, adaptability, easy to install. Combined needle roller bearings are widely used in machine tools, metallurgical machinery, textile machinery and printing machinery and other machinery and equipment, and can make the mechanical system design is very compact and dexterous.
Spherical ball bearings: two raceways of the inner ring and the raceway for the spherical surface of the outer ring, assembled with drum-shaped roller bearings. The curvature center of the outer raceway surface is the same as the bearing center, so it has the same self-aligning function as the self-aligning ball bearing. When the shaft or housing is deflected, it can be adjusted automatically without increasing the burden on the bearing. Spherical roller bearings can bear radial load and axial load in two directions. Spherical ball bearing radial load capacity is large, suitable for situations with heavy load and shock load. The inner ring inner diameter is tapered hole bearing, can be directly mounted. Or use the tightening sleeve, disassembly cylinder mounted on the cylindrical shaft. The cage uses steel plate stamping cage, polyamide forming. Spherical ball bearing is suitable for bearing heavy load and shock load, precision instrument, low noise motor, automobile, motorcycle, metallurgy, rolling mill, mining, petroleum, paper, cement, sugar and other industries and general machinery, etc.
Working principle: deep groove ball bearings mainly bear radial load, but also can simultaneously bear radial load and axial load. When it only bears the radial load, the contact angle is zero. When the deep groove ball bearing has a large radial clearance, with angular contact bearing performance, can withstand larger axial load , deep groove ball bearing friction coefficient is very small, the limit speed is also very high.
SKF deep groove ball bearing deep groove type continuous uninterrupted raceway. The raceway and the steel ball have a very good fit between them, which allows the bearing to withstand radial and axial loads in both directions. These bearings are very versatile and have an extremely simple design. They are suitable for high and ultra-high speed environments. Deep groove ball bearings are also one of the most widely used bearing types. Therefore, SKF also offers a wide range of designs, varieties, series and sizes of bearings. SKF deep groove ball bearings are available for shaft diameters ranging from 3 to 1500 mm.
Spherical roller bearings are bearings with drum-shaped rollers assembled between an inner ring with two raceways and an outer ring with a spherical raceway.
Spherical roller bearings have two rows of rollers, mainly to bear the diameter of a load, but also can withstand the axial load in either direction. There are high radial load capacity, especially suitable for heavy load or vibration load work, but can not bear pure axial load. This kind of bearing outer ring raceway is spherical, so its alignment performance is good, can compensate for coaxiality error.
Thrust bearing is divided into two parts: tight ring and live ring. Tight ring and shaft sleeve tight, live ring support in the bearing seat. Collar and rolling body usually use high strength, good wear resistance rolling bearing steel manufacturing, quenching the surface hardness should reach HRC60 ~ 65. keep frame more with soft steel stamping made, can also be used copper alloy sandwich rubber wood or plastic manufacturing.
Metal linear bearings are a linear motion system produced at low cost for use with cylindrical shafts with infinite travel. Since the carrier ball is in point contact with the shaft, the load used is small. The steel balls rotate with very little frictional resistance, thus allowing for high precision and smooth motion.
Plastic linear bearing is a self-lubricating linear motion system, the biggest difference between metal linear bearings is that metal linear bearings are rolling friction, bearing and cylindrical shaft is point contact, so this suitable for low load high-speed movement; and plastic linear bearings are sliding friction, bearing and cylindrical shaft is surface contact, so this suitable for high load in low-speed movement;.
Thrust cylindrical roller bearings Spherical roller bearings rolling body is cylindrical roller thrust rolling bearings. Thrust tapered roller bearing: the rolling body is tapered roller thrust rolling bearing.
Thrust needle roller bearings
The rolling body is the needle roller thrust rolling bearing.
Thrust spherical roller bearings
To the heart of the bearing and seat combination in a kind of assembly, in parallel with the bearing axis line of support surface has a mounting screw bottom plate.
Thrust ball bearing sliding contact surface for spherical, mainly for oscillating motion, tilting motion and rotary motion spherical plain bearing.
Bearings within a set of bearings at the same time by the above two bearing structure form combination of rolling bearings. Such as needle roller and thrust cylindrical roller combination bearings, needle roller and thrust ball combination bearings, needle roller and angular contact ball combination bearings.
Sliding bearings: sliding bearings are not divided into inner and outer rings and there is no rolling body, generally made of wear-resistant materials. Commonly used in low speed, heavy load and filling lubricating oil and maintenance of difficult mechanical rotation parts.
Tapered roller bearings rolling mill bearings are generally used only to bear radial load, compared with the same size of deep groove ball bearings, there is a greater radial load capacity, the limit speed is close to the deep groove ball bearings, but with this type of bearing shaft ﹑ shell hole processing requirements are high, allowing the inner ring axis and outer ring axis tilt is very small (2 ° -4 °), the two axis tilt such as beyond the limit, the contact between the roller and the ring raceway will Deteriorate, seriously affect the bearing load capacity, reduce the service life of the bearing. So this kind of bearings such as need to be installed in the role of bearing axial load host parts, only in the use of other types of bearings to bear the axial load, the premise can be used.
Generally customary known as 36, 46 type bearings as the representative of the six types of bearings, angular contact is generally 15 degrees, 25 degrees, 45 degrees, etc.
External spherical ball bearing types
Bearing with seat outer spherical ball bearings
Bearing with vertical seat outer spherical ball bearing
External spherical ball bearings with square housing
Diamond shaped housing spherical ball bearings
Round housing spherical ball bearings with tabs
Spherical Ball Bearings with Ring Seats
Spherical Ball Bearings with Sliding Block
Housing spherical ball bearings with suspension
Housing spherical ball bearings with suspension
Spherical ball bearings with adjustable diamond shaped housing
External spherical ball bearings with drawn housing
External spherical ball bearings with other housings
Thrust angular contact ball bearings thrust angular contact ball bearings contact angle is generally 60 ° commonly used thrust angular contact ball bearings are generally two-way thrust angular contact ball bearings, mainly used in precision machine tool spindle, generally used with double row cylindrical roller bearings together, can bear two-way axial load, with high precision, good rigidity, low temperature rise, high speed, easy to install and disassemble and other advan
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