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Assembly and disassembly of the bearing force must be aware of when, of forces in force as far as possible by NSK bearings axis, this requires a uniform point of application symmetrically and smoothly through the sphere, or parallel to the axis of the force. The size of the force should be smooth and uniform, not shocks, this requires the use of oil or to impose a stable tension or compression tool, would certainly have used when hammering, also through copper sleeve is soft but not falling scrap metal to be buffered, strike force as gentle as possible. Best use copper or copper hammer for hammer. Avoid the rolling force, which requires Assembly and disassembly on the inner ring (shaft), through the inner force, Assembly and disassembly when the outer ring) by applying pressure on the outer ring.
When the bearing temperature rises, first determine whether misuse, as did rise, should be dealt with as follows:
(1). check oil oil level is normal, if normal, check that the tank Vent valve is closed. If you have tight, oil to be filled, if sealant gasket seepage, should be shut down.
(2). take oil samples observed oil color changes, and for tests to see if bad. If confirmed when the deterioration, downtime should be replaced with new oil.
(3.) check for abnormal noise bearing, and detect whether the swing bearings are the exception.
(4.) should check the hydraulic speed Governor, if oil pressure may lead to cooling water of hydraulic valve is closed.
(5). check cooling water pressure, the water and piping systems are functioning correctly. If the water pressure is likely to be clogging of the filter cannot be processed in a timely manner, can shut down, when the confirmation work, again put into use.
First, we have to look at the bearing temperature rise causes:
(1.) may be the bearing oil quality deterioration, deterioration of the oil in the oil itself is not clean or run, such as increased moisture in the oil can cause increased the acidity of oil, will reduce oil lubrication, bearings subjected to corrosion, resulting in bearing temperature.
(2.) may be because the cooling of the bearing caused by the interruption.
Bearing temperature rise:
(1). the issue of bearing temperature rise fault signal.
(2). thermometer (-expansion thermometers) black-pin with yellow needles coincide or exceed yellow needles.
(3). machine hydraulic machinery fault alarm window, indicates that the bearing temperature meter temperature, signal relay.
(4). There are alarm bells ringing.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| NNU4932 NTN | 160 | 220 | 60 |
| NNU4930K NTN | 150 | 210 | 60 |