slewing ring

The material pitch bearing rings is 42CrMo, the heat treatment adopts the overall quenching and tempering treatment, and the surface of the raceway is quenched. The force of pitch bearings is complex, and the impact and vibration are relatively large. Therefore, the bearing is required to withstand both impact and large load. The life of the wind turbine main engine is required to be 20 years, and the cost of bearing installation is relatively large, so the life of the yaw and pitch bearings is required to reach 20 years. The hardness of the bearing ring base is 240-280HB, which can withstand impact without plastic deformation. At the same time, the surface quenching hardness of the raceway reaches 55-62HRC, which can increase the contact fatigue life and ensure the service life of the bearing.

Slewing ring is widely used in construction equipment like excavators. It is wear parts. We are specialized in the production of engineering machinery slewing bearings, drive shafts and matched pinions. If you need replacements of the steel balls, rollers or spacers, it is also available. For some common model excavators slewing bearing, we have ready stock and can deliver within one week. EX200, EX300, ZX470-5 is the hot selling models. If you have old slewing bearing in hand, we can instruct you to measure the detailed size to make a professional drawing and then manufacture it for you. Our company has a special quality testing laboratory, devoted to product design and development, product application and testing methods. At the same time, the company also has advanced production equipment and testing equipment to ensure that products have high performance, long life, low friction, high precision.

The double row ball slewing bearing has three seat rings. The steel balls and isolators can be directly arranged into the upper and lower raceways. According to the stress conditions, the upper and lower rows of steel balls with different diameters are arranged. This kind of open assembly is very convenient. The bearing angle of the upper and lower arc raceway is 75 degrees. It can bear a great deal of axial force and overturning moment. When the radial force is greater than 0.1 times the axial force, the raceway must be specially designed. The axial and radial dimensions of the double row ball slewing bearing are relatively large and the structure is fastened. It is especially suitable for handling tower cranes, truck cranes and other loading machines that require medium or above diameters, military products. The double-row four-point contact ball slewing bearing structure is similar to the single-row ball slewing bearing, the difference is that it uses two rows of steel balls as rolling elements, the two rows of steel balls have the same size, and a single isolation block is set between the steel balls. The inner and outer rings are integral, and the steel balls are loaded by plugging the holes. It requires a product for a heavy-duty, radially constrained host. Double row different diameter ball slewing bearing structure is characterized by the upper and lower double-row steel balls, inner and outer rings, isolation blocks and lubrication and sealing devices. However, the double-row different diameter slewing bearing is a three-piece slewing bearing, and its structure is more complicated.

Slewing bearing is an important "joint" of the crane. Various loads and moments on the working device need to be transmitted to the chassis through the slewing bearing. Because the slewing bearing is overloaded, it is also the part where the crane is prone to failure, so it is necessary to install a new slewing bearing after long-term use. Truck cranes, crawler cranes and other heavy construction cranes are usually using large single row four-point contact ball slewing ring bearing. This type of slewing bearing can bear larger axial load, radial load and tilting moment, enabling crane to lift heavy loads stably and reliably. To improve the manufacturing accuracy and working life of the slewing bearing, we focus on the heat treatment process, raceway quenching to prevent quenching cracks on the surface of the raceway. For high precision products, precise grinding is used to effectively control the parameters of ring ellipse, wall thickness and flatness, so as to ensure that the precision of finished products meets the requirements of standards or customer drawings. So our slewing bearings are with features of high precision, long working life and durable to use.

Ball and Roller Combination Slewing Bearing is mainly composed of an outer ring, an inner ring, rollers and steel balls. The inner ring and the outer ring each have a horizontal linear raceway and a spherical raceway, and the rollers are located in the horizontal In the linear raceway, the steel balls are located in the spherical raceway. The horizontally placed rollers bear the axial force, the radial force is borne by the steel ball, and the tilting moment is jointly borne by the both. It can not only bear large axial force, but also bear certain tilting moment and radial force, and has a small sectional size. This type of product is mainly used in construction machinery and equipment such as stackers and reclaimers.

Slewing ring bearing is widely used in excavator equipment. It belongs to wear parts. We are specialized in the production of engineering machinery slewing bearings, drive shafts and other gear parts. If you only need the bearing parts like steel balls, rollers, cages, it is also available. For some common model excavators’slewing bearing, we have ready stock and can deliver within one week. PC200, PC220, PC300 is our hot selling models and also the drive gear shaft. If you have old slewing bearing in hand, we can instruct you to measure the detailed size to make a professional drawing and then manufacture it for you.

Bucket wheel machine, also known as bucket wheel stacker and reclaimer, is an efficient equipment for continuous loading and unloading of bulk bulk materials in modern industries. It has been widely used in ports, wharfs, metallurgy, cement, steel plants, coking plants, coal storage plants, power plants, etc. The stacking operation of bulk material (ore, coal, coke, sand and gravel) storage yard. The function of the slewing bearing of the bucket wheel stacker and reclaimer is to support the slewing structure, bear the vertical direction force, horizontal force and tilting moment generated by the slewing structure during operation and non-operation, so that the machine is in a stable state. In view of its working conditions, there are two commonly used slewing bearing structures, one is a heavy-duty external tooth single-row cross-roller slewing bearing, such as 1797/2100, 1797/2460, 1797/2500, 1797/2600, 1797/2635 , 1797/3230, etc.; the other is a three-row roller slewing bearing with external teeth, such as 131/132.45.2500, 131/132.45.2800, 131/132.50.3150, 131/132.50.3550, 131/132.50.4000 , 131/132.50.4500, etc. These are the models that our company often makes. For detailed information, please call for consultation. If non-standard customization is required, our company can provide technical support such as selection, design, calculation, etc., you can call for details.

Port hoisting machinery generally includes portal cranes, ship unloaders, floating cranes, etc., commonly used single-row four-point ball type, three-row roller type and double-row ball type slewing ring bearings. Port cranes usually use three-row roller slewing bearings with internal or external teeth with a diameter of 4 meters to withstand high overturning moments. Our company often provides slewing bearings in this field, such as single-row ball type, 011/012.60.2000, 011/012.60.2240, 011/012.60.2500, 011/012.60.2800, 011/012.60.3150, etc., three-row roller type, etc. Slewing bearings include 131/132.45.2500, 131/132.45.2800, 131/132.50.3150, 131/132.50.3550, 131/132.50.4000, 131/132.50.4500, etc., as well as double-row ball slewing bearings 021/022.50 .2500, 021/022.50.2800, etc., are our main advantage products. If non-standard customization is required, our company can provide technical support such as selection, design, calculation, etc., you can call for details.

Ladle turret is commonly known as continuous casting machine. Slewing bearing for ladle turret generally uses three row roller structure slewing bearing, such as 132.45.2500/2800/3150/3550, etc. This structural product is a slewing bearing with high bearing capacity. , mainly used in heavy duty work situations. It consists of three ferrules, the upper and lower rows of rollers are distributed horizontally, and the radial force is borne by the three rows of rollers arranged vertically, so it can withstand the axial force and tilting moment from two directions. The ladle turntable is the key equipment of the continuous casting machine. It is used to carry and support the ladle for pouring. It is usually set between the molten steel receiving span and the column row of the pouring span. The designed ladle rotation radius makes the ladle nozzle at the specified position above the tundish when pouring steel. The ladle is placed on the turntable by the crane on the side of the molten steel receiving span, and is rotated by the turntable to make the ladle stop above the tundish to supply its molten steel. The poured empty package is rotated through the turntable, and then transported back to the molten steel receiving span. The load-bearing capacity and safety performance of the product are required to be high, so the three-row roller structure slewing bearing is often used. If non-standard customization is required, our company can provide technical support such as selection, design, calculation, etc., you can call for details.