yes. If foreign matters such as iron filings, burrs and dust enter the fag bearing, the fag bearing will produce noise and vibration during operation, and even damage the raceway and rolling element. Therefore, before Fag Bearing Installation installing fag bearing, you must ensure that the appearance and condition of the device are clean.
The surface of fag bearing is coated with antirust oil. You must carefully clean it with clean gasoline or oil, and then apply clean, high-quality or high-speed and high-temperature smooth grease before using the device. Fag Bearing Installation Cleanliness has a great influence on the service life and vibration noise of fag bearings. However, we would like to remind you that there is no need to clean and refuel the fully sealed fag bearing.
Here we briefly introduce the general criteria for selecting smooth grease. Smooth grease is made of base oil, Fag Bearing Installation thickener and additives. The smooth grease functions of different varieties and unified varieties and different trademarks are very different.
The allowable torsion limit is different, so you must pay attention to it when selecting. The function of smooth grease is mainly determined by the base oil. Ordinary base oil with low Fag Bearing Installation viscosity is used for low temperature and high speed, and high viscosity is used for high temperature and high load. Thickener is also related to the smooth function.
The water resistance of thickener determines the water resistance of smooth grease. In principle, different brands of smooth grease cannot be Fag Bearing Installation mixed, and even smooth grease with the same thickener will have a bad impact on each other due to different additives.
Smooth fag bearings, the more grease the better, this is a common Fag Bearing Installation misconception. Excessive grease in fag bearing and fag bearing chamber will form excessive mixing of grease, and then extremely high temperature will occur. The number of filling smoothing agent for fag bearing should be 1 / 2 ~ 1 / 3 to fill the internal space of fag bearing, and should be reduced to 1 / 3 at high speed.
When installing the fag bearing, do not directly hammer the fag bearing end face and non stressed surface. Use pressure block, sleeve or other Fag Bearing Installation devices (Tooling) to evenly stress the fag bearing. Do not pass through the rolling element power transmission device. If the surface of the device is coated with smooth oil, the device will be smoother.
If the common interference is large, put fag bearing into mineral oil and heat it to 80 ~ 90 ℃, install it as soon as possible, and strictly control the oil temperature not exceeding 100 ℃, so as to avoid tempering effect, hardness reduction and size recovery. In case of difficulties in disassembly, it is recommended that you use the method of pulling the disassembled things outward and carefully pour hot oil on the inner ring. The heat will expand the inner ring of fag bearing and make it easier to fall.
Not all fag bearings require small task clearance. You must select the appropriate clearance according to the premise. In national standard Fag Bearing Installation 4604-93, the radial clearance of rolling bearing is divided into five groups – group 2, group 0, group 3, group 4 and group 5.
The clearance value is from small to large, and group 0 is the standard clearance. The fundamental radial clearance combination is used for common operation premise, conventional temperature and common interference; Under the special premise of high temperature, high speed, low noise and low friction, FAG bearing should choose large radial clearance; Small radial clearance should be selected for fine spindle and fag bearing for machine tool spindle;
Fag bearings on rollers can adhere to a few task clearances. In addition, there is no clearance for separate fag bearings; Finally, the task clearance of fag bearing after installation is smaller than the original clearance before the device. Because fag bearing has to accept certain load torsion, there is also the elastic deformation caused by fag bearing and load.