The clearance of American TIMKEN bearings refers to the amount of movement when the inner or outer ring of the bearing is fixed when the bearing is not mounted on the shaft or the bearing box, and then the unfixed side moves radially or axially.According to the moving direction, it can be divided into radial clearance and axial clearance.
The size of running clearance (called working clearance) has an effect on the rolling fatigue life, temperature rise, noise, vibration and other performances of the imported bearing.When measuring the clearance of a bearing, a specified measuring load is usually applied to the bearing to obtain a stable measurement value.Therefore, the resulting measurement is larger than the actual clearance (called theoretical clearance), which increases the amount of elastic deformation generated by the measurement load.
However, for roller bearings in TIMKEN bearings in the United States, the elastic deformation amount is small and can be ignored.The internal clearance of the bearing before installation is generally expressed by theoretical clearance.
Bearing lubrication is the use of oil film will be relatively moving rolling surface separated from each other, not due to rough point contact lead to excessive wear and failure.If the user can attach great importance to the lubrication technology of imported bearing, it can ensure that the stable performance and rotation accuracy can be maintained during the working life.
Turn the outer ring and carefully rinse the junction of the cage, roller and raceway, thoroughly cleaning any remaining oil that was previously hidden.TIMKEN bearings should be attached after rinsing clean friendly dry cleaning, clean the lining of the neutral table to support dry, or in the far infrared drying box slowly.Since even dry cleaning friends dry or dry, the whole process should not put the bearing ring, adhere to any frame or rolling body.Bearing oil can be removed before test delivery in practice by oil seal packing and immersed in acid free 3% kerosene or gasoline cleaning.
Check for dripping oil and immediate delivery of dry or dry bearings upon request.At this time, there is no oil film to protect the outer surface of the bearing. The inspector is not allowed to touch the skin directly during the whole process. The operator should wear clean gloves and paint the bearing with rust, but must avoid in the hands of the rust inhibitor mixed with the appearance of the American TIMKEN bearing, otherwise the deviation of the measurement results will be measured.
The stock shall be immediately served or rusted and the entire inspection process shall be completed after inspection of the imported bearing.Take too long to avoid corrosion.Pay attention to the use of clean, oil-free pure gasoline, which can also cause corrosion.
Bearing is dry, or dry, shall be in accordance with the provisions, check without the outer surface of the bearing oil film protection drip into the lubricating oil and instant delivery, at this point, the entire process of inspection, does not allow direct contact with human skin, the operator should wear clean gloves, hand painted with rust, but in the hands of mixed corrosion inhibitor of rolling bearing surface must be avoided, otherwise it will be the deviation of measurement results.
American TIMKEN bearings are inspected immediately after delivery or rusted during the check process, and should not be held for too long to cause corrosion during the check process.Pay attention to the use of clean, oil-free pure gasoline, which can also cause corrosion.
The lubrication of imported bearing is divided into grease lubrication and oil lubrication, the advantage of grease lubrication is simple lubrication facilities, grease is not easy to leak, there is a certain waterproof, gas and other impurities into the bearing capacity, so generally widely used grease lubrication.Oil lubrication at heavy load, high speed, high temperature, etc.
The grease is composed of base oil, thickener and filler.The viscosity of the base oil plays an important role in the lubricating performance of the grease, and the composition of the thickener has an important impact on the performance of the grease, especially the temperature characteristics, water resistance, oil separation, etc. The filler is mainly used to enhance the properties of the grease such as anti-gasification, rust and extreme pressure.
