YRT rotary table bearings are designed with a radial full roller, two groups of axial needle roller, cage assembly, an out ring, an L-section inner and the second ring.
The out ring and inner ring have fixing holes, so the bolt can fix the bearings directly.
This type of bearing has high axial and radial load-bearing capacity, high tilting stiffness, and extremely high accuracy.
Suitable for rotary table, as well as bearing configurations in measurement and experimentation.
This type of bearing also has high requirements for the matching equipment parts, and the tightening torque of the installation screws needs to be controlled during installation.
Widely used in precision rotary tables, vertical grinders, indexing heads, gear hobbing machines, milling machine workpiece shafts and other precision devices.
The axial radial combination structure can simultaneously withstand double axial loads, radial loads, and overturning moments.
There are mounting holes evenly distributed on the bearings, which can be directly fixed to the bearings using bolts.
The bearings have preload clearance before leaving factory, so there is no need to adjust the clearance during installation.
This series of bearings is suitable for situations with low rotational speed, short operating cycle, and high requirements for rigidity and accuracy, such as rotary table, indexing heads, etc.
Suitable for high -precision and bearing joint load
There are installation holes on the bearing sleeve, which is very convenient to install.
Install the rear axial and radial pre -load, ensuring high precision and high rigidity
The size series is complete, and it is applied to different sizes of turntables.
YRT series rotary table bearings adopt a combination of one set of radial fully loaded rollers and two sets of thrust roller cage components structural design, one outer ring, one L-shaped inner ring, and a second inner ring, with mounting holes on the inner and outer rings, and factory produced preload is added in advance, which not only simplifies the component structure, but also reduces the workload of installation and reduces the impact on installation high requirements.
Therefore, for low speed and short-term operation fields that require high precision, high rigidity, and withstand combined loads.
combination, such as indexing rotay ttable and rotary milling heads, is suitable for selecting YRT series rotary table bearings.
This series of bearings has two types of axial and radial runout accuracy, and customers can choose reasonably according to demand.
Basic rated life means that a number of bearing operates separately under the same conditions, and 90%of them can reach the total rotation without rolling fatigue. Its actual life span is related to the selection, materials, structure, processing quality, the surrounding design and operating environment and installation and maintenance of the bearing, but the fatigue failure is not the main form of the bearing failure of the bearing. It is usually lost due to wear (axial and radial gaps) or other non -normal use damage due to wear.
For the limit speed NE of the bearing permit, please refer to the size specification table. The extreme speed of the bearing is related to the working temperature of the bearing, and the working temperature depends to a large extent on the structure, size, accuracy, pre -load, actual load, lubrication conditions, installation accuracy, environmental temperature and heat dissipation of the bearing. The limit speed in the size specification table is calculated based on the work conditions of the bearings under normal circumstances.
When a static load is applied on the bearing, the contact part of the rolling band and the roller tract will produce a local split -shaped plastic deformation. Because it is plastic deformation, it will cause poor bearings to rotate, and the noise and vibration will become larger. Therefore The benchmark of the load, the basis of the basis of the rated static load CO is as follows: Basic fixed -rate static load refers to the static load that is equivalent to the following contact stress between the contact regional center of the rolling and rolling surface under the state of the maximum static load. The rolling body and scroll plastic deformation of the roller of the bearing 4000MPa roller bearing under the above contact stress are 0.0001 times the diameter of the rolling body.
When the volume static load refers to the static load under the actual load when the roller and the roller contact surface are maximized. In general applications, the basic setting and quiet load CO is considered to be the limit load, but according to the nature and use of the actual use, the static security factor SO as shown below must be considered (used to indicate that the plastic deformation that is not allowed in the bearing in the bearings to be allowed safety)
So = COR/POR = CoA/POA
SO - static load safety coefficient
COR - radial basic rated static load
COA - axial basic rated static load
POR - radial equivalent static load
POA - axial equivalent static load
The main role of extreme static loading lotus is:
1. Determine the size of the bearings when the bearing is mainly loaded.
2. Calculate the overtime torque MK that the bearings can withstand.
The limit load map is calculated based on the static load safety factor of the bearing, and the strength of the bolt and bearing circles. When selecting bearings, do not exceed the limit static load, as shown in the figure below:
① Bearing size ② Allowable ③ No allowable range
Mk = overturned torque
FA = axial load
Yiyang Advanced Manufacturing Development Zone, Luoyang City, Henan Province, China.
mark.hu@avebearing.com avebearing01@163.com
+86 15036588800
