What size excavator bearings: hardware store skateboard bearings

In the process of assembly, need to aim the half coupling installation position, and install the side with a hammer to strike, know to set the line can be installed on both ends. & emsp; & emsp; Heating time is too long, prolong operation time: flame heating, heat from the fire to the spare parts to the appropriate temperature, the entire process needs - Hours, ShiYanChang repair equipment downtime, increase the workers' labor intensity, hold up the entire company production task. This is the foundation of the development of auto transmission bearing, for the operation of bearing, the main failure form is fatigue pitting, shall be calculated on the basic dynamic load rating for life. Its characteristic is have roots or sharp edge, overcome the way as follows: enlarging the clearance and strictly control the ball diameter is poor, so as to protect bearings can from the first point contact after operation. Other not sealed bearing such as double row circular cone roller bearings must add grease lubrication, when installed as experience: during installation, the amount of grease to take the % of bearing clearance. When quenching heating temperature, as the extension of austenitizing time, did not dissolve carbide to reduce the number of retained austenite, hardness, for a long time, to slow this trend. If confirmed is the noise in the bearing, bearing may have been damaged, need to change, because the former wheel lead to bearing failure on both sides of the working conditions are similar, so even if only a bad bearings, also recommends replacement in pairs. The boiler fan bearing abnormal, cause bearing heating, then put the bearing into the clean kerosene, with soft hair brush to wash, put them in gasoline cleaning time, comes out on the clean paper. Bearing during operation, regular inspection by the regulation, if fever, noise, vibration, etc. , to stop in time to find the reason, fault, bearing such as found serious fatigue spalling, pit, crack, hardness of the oxidation corrosion, wear and tear down to HRC& lt; Or have too much noise can't adjust, should be replaced in a timely manner. Needle roller bearing used lubricating oil ( Or grease) Has set the working temperature, when the temperature is too high will deteriorate, thereby losing lubrication, the bearing damage due to high temperature. To - , according to the data already has the show, the length of the new car has reached the mm, width has reached the mm, height reached the mm, within the scope of the bearing inside diameter tolerance has a big roll diameter tolerance is that the sum of surplus quantity meet the requirements, bearing inside diameter size tolerance control in the phi - - 。 Base oil and additives of oxidation and cracking happens, the stability of the problem, is a direct impact on bearing can operate properly, and whether it can play a normal role of main performance.