Radial thrust bearing specification sheet:

GB 273.1 Rolling bearings Tapered roller bearing dimensions;

GB 273.2 Rolling bearings Thrust bearing dimensions scheme;

GB 273.3 Rolling bearings Radial bearing dimensions scheme;

GB 276 rolling bearing deep groove ball bearing dimensions;

GB 281 rolling bearing, self-aligning ball bearing dimensions;

GB 283 rolling bearing cylindrical roller bearing dimensions;

GB 285 rolling bearing double row cylindrical roller bearing dimensions;

GB 288 rolling bearing Spherical roller bearing dimensions;

GB 290 rolling bearing dimensions of drawn cup needle roller bearings;

GB 292 radial bearing angular contact ball bearing dimensions;

GB 294 radial bearing four-point contact ball bearing dimensions;

GB 296 rolling bearing double row angular contact ball bearing dimensions;

GB 296 rolling bearing tapered roller bearing dimensions;

GB 296 rolling bearing flat bottom thrust ball bearing dimensions;
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Bearing maintenance, cleaning, overhaul, lubrication and installation

First, the cleaning of the bearing

When disassembling the lower bearing for inspection, first record the appearance of the bearing, confirm the residual amount of the lubricant, and then wash the bearing after sampling the lubricant for inspection. As a cleaning agent, gasoline and kerosene are commonly used.
The cleaning of the removed bearings is divided into coarse cleaning and fine cleaning. They are placed in the container respectively, and the metal mesh bottom is placed first so that the bearing does not directly contact the container. In rough cleaning, if the bearing is rotated with dirt, it will damage the rolling surface of the bearing and should be noted. In the rough cleaning oil, use a brush to remove the grease and the adhesive. After it is almost clean, it is transferred to the fine wash.
Fine washing is to carefully clean the bearing while rotating it in the cleaning oil. In addition, the cleaning oil should always be kept clean.
Bearing inspection and judgment: In order to judge whether the removed bearing can be used, it should be checked after the bearing is cleaned. Check the raceway surface, the rolling surface, the state of the mating surface, the wear of the cage, the increase of the bearing clearance, and the damage and abnormality that are irrelevant in dimensional accuracy. For non-separable miniature ball bearings, use one hand to support the inner ring horizontally and rotate the outer ring to check if it is smooth.

Separate bearings such as tapered roller bearings can be inspected separately for the rolling surfaces of the rolling elements and the outer ring.

Large bearings cannot be rotated by hand. Pay attention to the appearance of rolling elements, raceways, cages, and ribs. The higher the importance of bearings, the more careful inspection is required.

Second, the lubrication of the bearing

The purpose of bearing lubrication:

The purpose of lubrication of rolling bearings is to reduce internal friction and wear of the bearings, to prevent sticking, and the lubricating effect is as follows.
(1) Reduce friction and wear.
In the mutual contact portion of the ferrule, the rolling element and the retainer constituting the bearing, metal contact is prevented, and friction and wear are reduced.
(2) Extend the fatigue life.
The rolling fatigue life of the bearing is prolonged when the rolling contact surface is well lubricated during rotation. Conversely, if the oil viscosity is low and the thickness of the lubricating oil film is not good, it is shortened.
(3) Discharge friction heat and cool.
The circulation oil supply method or the like can be used to discharge heat generated by friction or heat from the outside to cool. Prevent the bearing from overheating and prevent the lubricant from aging itself.
(4) Others: There are also effects of preventing foreign matter from entering the inside of the bearing or preventing rust and corrosion.

Lubrication method:

The lubrication method of the bearing is divided into grease lubrication and oil lubrication. In order to make the bearing function well, first, choose a lubrication method that suits the conditions of use and the purpose of use. Lubricity of oil lubrication predominates if only lubrication is considered. However, grease lubrication has the advantage of simplifying the structure around the bearing and comparing the advantages and disadvantages of grease lubrication and oil lubrication.

Third, the installation of the bearing:
Whether the bearing is installed correctly affects accuracy, life and performance. Therefore, the design and assembly department should fully study the installation of the bearing. I hope to install according to the operating standards. The items of the job standard are usually as follows:
(1) cleaning the bearing and bearing related components;
(2) Check the size and finishing of the connected components;
(3) installation;
(4) Inspection after installing the bearing;
(5) Supply lubricant.

Generally grease is lubricated, not cleaned, and directly filled with grease. Lubricating oil is not necessary for cleaning. However, for instruments or high-speed bearings, it should be cleaned with clean oil to remove the rust inhibitor applied to the bearing. The bearing with the rust preventive removed is easy to rust, so it cannot be placed. Furthermore, bearings that have been sealed with grease are used without cleaning.

The mounting method of the bearing varies depending on the bearing structure, fit, and conditions. Generally, since the shaft is mostly rotated, the inner ring needs an interference fit. Cylindrical bore bearings, press with multiple presses, or use hot charging methods. For taper holes, mount directly on the taper shaft or with a sleeve.

When installed in the outer casing, the general clearance fits a lot, and the outer ring has an interference amount, which is usually pressed by a press or a cold shrink fit method after cooling. When dry ice is used as the coolant and the shrinkage is installed, the moisture in the air will condense on the surface of the bearing. Therefore, appropriate rust prevention measures are required.
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Analysis of different fault life of linear bearings

Fatigue life: The material of the main moving parts of the linear bearing reaches the limit, resulting in the accumulated time before the linear bearing fails.


Rated dynamic load: The load that a linear bearing can withstand when the service life is 10,000 rpm.


Equivalent dynamic load: The assumed load in which the actual load of the linear bearing is converted in accordance with the operating conditions for determining the dynamic load.


Wear life: The cumulative working time of the linear bearing before it reaches the specified limit due to normal wear. At today's linear bearing industry level, wear life > fatigue life should be used, but in fact traction motors are just the opposite.


Fault life: The cumulative working time before the linear bearing fails and the working capacity is lost.


Service life: It is the above three life-finding formulas. In theory, it refers to the fatigue life of linear bearings. In normal use conditions, it shows the wear life of linear bearings. When the conditions are abnormal and there are no defects in manufacturing, it represents the fault life. .
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Powder metallurgy oil bearing introduction

Powder metallurgy oil-impregnated bearings are generally formed at one time and are basically not machined. The cost is lighter than machining, the material waste is less, the price is therefore cheaper, and it is in line with the current national policy of promoting energy conservation, so it is considered to be a technology that will not fall behind.

The powder metallurgy oil-impregnated bearing has been filled with lubricating oil by vacuum impregnation in the base body, and the lubricating oil will seep out to the running surface due to temperature rise and pumping during operation, so it can be used without additional lubricating oil. The occasion.

Powder metallurgy oil-impregnated bearings (oil-bearing bearings) are a class of porous alloy products impregnated with lubricating oil in the pores. When the shaft rotates, the temperature of the oil-impregnated bearing rises and the pumping action is caused by the friction between the shaft and the oil-impregnated bearing.

The lubricating oil impregnates the friction surface containing the inner or outer diameter of the oil-impregnated bearing when the shaft stops rotating. The lubricating oil is returned to the inside of the oil-impregnated bearing. Therefore, the consumption of lubricating oil is extremely small, and it can be used for a long period of time without supplying lubricating oil from the outside, and is very suitable for the occasion of difficulty in supplying oil and avoiding contamination of lubricating oil.
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Overhaul of machine tool spindle bearings

Determine whether the disassembled machine tool spindle bearing can be reused. Check the machine spindle bearing after cleaning. Carefully check the raceway surface, rolling surface, mating surface condition, cage wear, bearing clearance increase and presence or absence. Damage and abnormality in which the dimensional accuracy is lowered. For the non-separable ball machine spindle bearing, use one hand to support the inner ring horizontally and the outer ring to check whether it is smooth.

Separate machine tool spindle bearings such as tapered roller bearings can be inspected separately for the rolling surfaces of the rolling elements and the outer ring.

Large-scale machine tool spindle bearings can not be rotated by hand, pay attention to check the appearance of rolling elements, raceways, cages, ribs, etc. The higher the importance of machine tool spindle bearings, the more careful inspection is required.

The above is the introduction of the cleaning and overhaul of the spindle bearings of the machine tool, hoping to help you better maintain the bearings and extend the service life of the bearings.
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Laser engraving machine engraving introduction

Engraving machine manufacturer laser engraving machine engraving introduction

The dot matrix engraving dot is like a high definition dot matrix print. The laser head oscillates left and right, each time engraving a line consisting of a series of points, and then the laser head simultaneously moves up and down to engrave a plurality of lines, and finally constitutes a full-page image or text. The scanned graphics, text and vectorized graphics can all be carved using dot matrix.

Vector cutting is different from dot matrix engraving, and vector cutting is performed on the outer outline of the graphic. We usually use this mode to perform penetrating cuts on wood, acrylic, paper, etc., as well as marking on a variety of materials.

Engraving speed: Engraving speed refers to the speed at which the laser head moves. It is usually expressed in IPS (inches per second), which results in high productivity. Speed ​​is also used to control the depth of the cut. For a particular laser intensity, the slower the speed, the greater the depth of the cut or engraving. You can adjust the speed with the engraver panel or with your computer's print driver. In the range of 1% to 100%, the adjustment range is 1%. The advanced motion control system of the Hummer makes you get super-fine engraving quality when carving at high speed.

Engraving intensity: Engraving intensity refers to the intensity of the laser that strikes the surface of the material. For a particular engraving speed, the greater the intensity, the greater the depth of the cut or engraving. You can adjust the intensity with the engraver panel or with your computer's print driver. In the range of 1% to 100%, the adjustment range is 1%. The greater the intensity, the greater the speed. The depth of the cut is also deeper

Spot size: The laser beam spot size can be adjusted with lenses of different focal lengths. Small spot lenses are used for high resolution engraving. Large spot lenses are used for lower resolution engraving, but for vector cutting, it is the best choice. The standard configuration for the new device is a 2.0 inch lens. Its spot size is in the middle and is suitable for all kinds of occasions.

Engravable materials: wood products, plexiglass, metal plates, glass, stone, crystal, Corian, paper, two-color board, alumina, leather, resin, spray metal

The latest 7 major technical features of woodworking engraving machine

In the current form, the technical functions of woodworking engraving machines are becoming more and more powerful, which makes the application of woodworking enterprises more and more time-saving and labor-saving. The following seven technical features of woodworking engraving machine are introduced, so that everyone can feel the convenience brought by scientific and technological progress. .

   First, display processing trajectory and simulation

1. Visually display the processing process and observe the processing effect, which can pre-examine the rationality of the processing effect, thereby reducing the trial cutting process and reducing the bottom processing cost.

2. The processing plan can be evaluated to help you choose a reasonable processing technology.

Second, breakpoint memory function

This function can be used to continue the engraving work when your equipment suddenly loses power (or if the knife is broken, or if half of the material being processed is not finished, or where further processing is required).

Third, optimized the arc command

The engraving circle is as fast as the straight line, and the cutting surface is very smooth. After the arc command is used, the engraving curve is faster and smoother, the relief effect is better, and there is no pause in the engraving process.

Fourth, can be compatible with all kinds of excellent carving software in the world

Connect to the world's best engraving software, such as: MASTERCAM\ARTCAM can also be compatible with domestic engraving software, such as JDP, Wentai and so on.

Fifth, you can directly edit the G code of the living

When the G code made by the user needs further modification, it can be directly read (opened in the WINDWS Notepad format), which is convenient for your operation on the file.

Six, woodworking engraving machine can be programmed by itself

You can directly edit some simple programs to test the performance of the device, or you can call the advanced users to special needs.

Seven, processing timing

The program greatly facilitates the choice of your purchase. By comparing the same piece of workpiece, you can compare it and then select the product you are satisfied with. If you need to mass produce the product, you can budget your processing time and help you choose The most efficient processing mode.