Oil For Cardan Shaft

Why does the cardan shaft not add oil? How much oil should I pay for inspection and maintenance? This article largely addresses these common oiling problems.

Taking the cross package of the common SWC350BH model as an example, the effective clearance space inside the single bearing sleeve is about 97000 mm^3 after the cross-packing is not oiled. Since the new cross shaft assembly generally adopts the four-point lubrication method, during the assembly of the cross shaft assembly, Jiangsu Sitong Cardan Shaft CO., Ltd. is pre-oiled by the inside of the bearing in one pair of four directions to ensure the early use of the universal joint shaft.

Does refueling fail because of any problem with the cross shaft assembly? Before answering this question, let us first troubleshoot and solve several problems:

(1) Whether the oil hole is blocked? If the grease mouth is smashed to the hexagonal deformation or the grease rust is rusted, the oil passage will be blocked. In this case, the grease fitting should be replaced in time. Jiangsu Sitong Cardan Shaft CO., Ltd reminds you to keep the interface clean before the replacement process to prevent the incorporation of mechanical impurities, dust and sand.

(2) Grease gun intake pressure is insufficient. The high-pressure oiler is an oil-filling device powered by compressed air. The pump generates high pressure and uses high pressure for oil injection. Pay attention to starting the air compressor before use, and prepare compressed air of 0.6-0.8 MPa. The joints must be cleaned when connecting, and the nut should be tightened with a wrench to avoid oil leakage.

(3) Filled grease is not suitable. Grease works on the principle that the thickener keeps the oil in the position where it needs to be lubricated. When there is a load, the thickener releases the oil and acts as a lubricant. If temperature difference between winter and summer is large, it is necessary to pay attention to timely replacement of the grease in the season, so as to prevent hardened butter block from blocking the oil hole. ST universal joint shaft cross shaft assembly generally adopts 3# universal lithium grease, and is applied to various mechanical equipments in the working temperature range of -20°C-120°C, which has good water resistance, mechanical safety and prevention, rust and oxidation stability.

(4) The operator's misjudgment. In some cases, the operator will have a misjudgment that does not enter the oil. For example, the general common pneumatic high-pressure oiler delivers about 0.85 L/min. For the SWC350 cross-shaft assembly mentioned in the article, the bearing cavity is filled with a fuel-filled contract of 6.85 s, taking into account the factory pre-filled oil. The actual oil filling time is about 3-5s, depending on the amount of daily grease. Therefore, the replacement time of the grease should be determined according to the specific use conditions, so as to ensure reliable lubrication without causing waste of grease.

When you encounter problem of refueling again, you don't need to panic to determine that structure can't be refueled and use violent means to fill grease. First check above situation one by one, I believe that can solve most of problems you encounter.

If the customer's actual use of the site temperature control is extremely extreme, in the early selection or quotation, we must communicate with our technical personnel in time, we will use the appropriate grease in the design and production to meet your needs.

More maintenance knowledge will continue to push for you, we will be dedicated to serve you as a competent assistant for the logistical maintenance of industrial cardan shaft components.

For more information, please feel free to contact us.