Introduction to common bearing types of CNC rotary table

1. Thrust ball bearing + cylindrical roller bearing: Thrust ball bearing can withstand certain axial force, so the bearing is mainly used to bear the weight of the workpiece; and cylindrical roller bearing is mainly used for radial positioning and external diameter. Directional force (eg cutting force, milling force, etc.). This type of design is widely used and relatively inexpensive.

2, static pressure bearing + precision cylindrical roller bearing: Static pressure bearing is a kind of sliding bearing that relies on externally supplying pressure oil to establish a static pressure bearing oil film in the bearing to realize liquid lubrication. Hydrostatic bearing always works under liquid lubrication from start to stop, so there is no wear, long service life and low starting power. In addition, this bearing also has the advantages of high rotation precision, large oil film stiffness, and can suppress oil film oscillation. Precision cylindrical roller bearings have good radial bearing capacity, and thanks to the use of precision bearings, the rotary table's rotation accuracy is also well guaranteed. The turrets of this type can withstand high axial forces. Some workpieces weigh more than 200 tons and the turrets exceed 10 meters in diameter.

3, cross roller bearing: the application of cross roller bearings on the turntable is also relatively common. Crossed roller bearings are characterized by two raceways in the bearing and two rows of rollers arranged in a row. Compared with the traditional thrust bearing + radial centering bearing combination, the cross roller bearing is compact, compact and simplifies the workbench design, thus reducing the cost of the turntable.

In general, the bearing as the spindle and core component of the CNC rotary table plays a decisive role in the performance of the CNC rotary table. In order to select the proper size and type of bearings, we need to consider various working conditions.

For more products, please visit: http://www.supplyforever.com/

5 major precautions for bearing use

1. Improve the lubrication quality, control the pressure, temperature and flow of the oil, and strengthen the oil filtration.

2. Use fuel and lubricating oil that meet the requirements.

3. Controlling the temperature state of the diesel generator set is unfavorable in the case of overcooling and overheating. In cold weather, the diesel engine should be preheated before starting, and the crankshaft should be turned by hand to make the oil enter the friction surface.

4, bearing and journal surface quality and geometry should be strictly guaranteed.

5, the bearing clearance should be appropriate, the generator set is too large to produce impact, too small, the lubrication is poor, may burn the tile.
For more products, please visit: http://www.bearingkingdom.com

Joint bearing principle and application field

The structure of the joint bearing is simpler than that of the rolling bearing, and it mainly consists of an inner ring having an outer spherical surface and an outer ring having an inner spherical surface. Joint bearings are generally used for low-speed oscillating motion (ie angular motion). Since the sliding surface is spherical, it can also be tilted in a certain range of angles (ie, aligning motion), and the support shaft is not concentric with the shaft hole. When the degree is large, it still works normally.

Joint bearings are widely used in engineering hydraulic cylinders, forging machine tools, engineering machinery, automation equipment, automotive shock absorbers, water conservancy machinery and other industries. The joint bearing is a spherical plain bearing, and the basic type is composed of inner and outer rings having a spherical sliding spherical contact surface. Depending on its structure and type, it can withstand radial loads, axial loads, or combined loads acting in both radial and axial directions.

Because the spherical sliding contact area of ​​the joint bearing is large, the inclination angle is large, and also because most joint bearings adopt special processing methods, such as surface phosphating, galvanizing, chrome plating or outer sliding surface lining, inserting, spraying, etc. Therefore, it has large load capacity and impact resistance, and has the characteristics of corrosion resistance, wear resistance, self-aligning, good lubrication or self-lubricating and non-lubricating dirt pollution, even if the installation is misplaced, it can work normally. Therefore, joint bearings are widely used for low-speed oscillating motions, tilting motions, and rotational motions.
For more products, please visit: http://www.supplyforever.com/

Introduction to maintenance of fan bearings

Although the outer casing of the fan is mostly made of metal, it does not mean that it is indestructible. If the user can not use it properly, the outer casing of the fan can be easily eroded, and the loss to the fan is also great. Therefore, in addition to regular inspection of the casing and the inside of the air intake, there is serious wear and tear. In addition to dust accumulation, these parts can be repaired without special repairs. Regularly check that all the fastening bolts are tight. For the fan with the compression bolts, press the butterfly spring on the foot to the installation height specified in the drawing.

When it comes to the bearing of the fan, the first thing to consider is the bearing lubrication system of the fan. If you find that the body of the fan is leaking oil, you can tighten the bolts of the end caps. If this is not possible, you may have to switch to a new seal packing. Also, when the lubricating oil of the bearing is used normally, it should be replaced at least once in half a year. When it is used for the first time, it will be carried out after about 200 hours of operation. The second oil change time is carried out in 1 to 2 months. Lubricating oil once, if the lubricating oil has not deteriorated, the oil change work can be extended to 2~4 months. When replacing, you must use the specified grade of lubricating oil. In this process, you must remember to thoroughly remove the old oil in the fuel tank. Clean and clean before pouring new oil.

Since the bearings often need to use lubricating oil, if the cleaning is not normally done, the bearing is easily covered by greasy dirt, so it is especially important to regularly clean the fan bearings. Bearings often wear out during use, and special attention should be paid to the degree of wear. If it is severely worn, it is necessary to consider replacing the new ones.
For more products, please visit: http://www.bearingkingdom.com