11x15-1 Roller Bearing

Name Roller material GCR15, stainless steel hardness HRC60-65 excircle tolerance 2um length tolerance 30um verticality ≤ 15um end face runout ≤ 15um roundness ≤ 1um surface roughness ≤ Ra1umGCr15 refers to a high carbon chromium Bearing steel with less alloy content, which has high hardness, uniform structure, good wear resistance and high contact fatigue performance after quenching and low temperature tempering. Areas of application Bearing rollers, jet nozzles of turbojets, plungers, flaps, bushings, etc.

The removal of the Roller Bearing is a regular maintenance and is performed when the Bearing is replaced. After removal, when you need to use it directly or check the Bearing status, please remove it as carefully as during installation. Please pay attention to the parts of the Bearing. The operation is difficult. Then, let's learn how to remove the Roller Bearing.

1. It must be installed under dry and clean environmental conditions. Before installation, the machining quality of each part must be carefully checked. All mating joint surfaces shall be carefully cleaned to remove burrs and the raw surfaces of castings shall be degrinded.

2. Before installation, it must be cleaned with gasoline or kerosene, and used after drying to ensure good lubrication. Bearing generally use grease lubrication, but can also use oil lubrication.

3. During installation, uniform pressure must be applied to the circumference of the end face of the ferrule, press into the ferrule, and do not use tools to directly knock, so as not to damage the Bearing.

4. When the amount of interference is small, can the sleeve be used to press the end face of the Bearing ferrule at normal temperature? Beat the sleeve and evenly press it into the ferrule through the sleeve. Please use hydraulic press for mass installation. The end face of the outer ring is pressed against the end face of the shell shoulder, and the end face of the inner ring is pressed against the end face of the shaft shoulder, and there is no gap during pressing.

5. When the overflow is large, it can be installed by oil bath heating or sensor heating Bearing. The heating temperature range is 80-100. The height shall not exceed 120. In addition, please tighten the Bearing with nuts or other appropriate methods to ensure that after the Bearing cools down, it shrinks in the width direction, and there will be no gap between the ferrule and the shaft.

6. Rotary test shall be carried out after installation, which shall be used for rotating shaft or Bearing box first. When there is no abnormality, the power runs at no load and low speed, and then gradually increase the speed and load according to the operating conditions, detect noise, vibration and temperature rise, and stop the machine for inspection when abnormalities are found. The operation test shall be carried out normally before delivery.

Through the above study, we found that the installation of the Roller Bearing is not simple, and many details need to be paid attention. Can't just pretend. This will affect future work. Even if you spend time on checking and setting up work, you hope that there will be no confusion during the work. Therefore, it is important to understand the installation considerations for the Roller Bearing.

It is also important that Roller Bearing design and make decomposition tools as needed. When decomposing, study the decomposition method and steps according to the drawings, and investigate the Bearing mosaic conditions to make the decomposition operation foolproof. When removing the outer ring of the outer ring interference fit, install several screws for outer ring extrusion screws on the circumference of the housing in advance, and remove them while tightening the screws evenly. These threaded holes are usually covered with blind plugs, conical Roller Bearing, etc. Separate Bearing, with several cutouts so that the housing will block the shoulders, and are removed by press using spacers or lightly tapped.

The removal of the inner ring of the Roller Bearing is simple to pull out with a press. At this time, please be careful not to apply a shedding force to the inner ring. Note that the pull hook shown in the figure is often used, no matter what kind of pull hook must be firmly clamped on the side of the inner ring. For this reason, the size of the shaft shoulder needs to be considered, or the machining groove needs to be considered to use the drawing chuck. The inner ring of large Bearing is disassembled by hydraulic method. Hydraulic pressure is applied through the oil hole on the Roller Bearing to facilitate extraction. Wide Bearing and using hydraulic method and drawing fixture for disassembly operation. The inner ring of the Roller Bearing can be removed by induction heating. The method of heating the local area in a short time to expand the inner ring and pull it out. When a plurality of such Bearing inner rings need to be mounted, the induction heating method is also used.

GCr15It refers to a high-carbon chromium Bearing steel with less alloy content. After quenching and low-temperature tempering, it has high hardness, uniform organization, good wear resistance and high contact fatigue performance.

Application field Bearing roller,turbojet engineNozzle, plunger, valve, bushing, etc.