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For as long as possible to maintain in good condition bearing the original performance, required maintenance, repair order to prevent accidents in the first place, to ensure the reliability of operation, improve productivity, economy. Operating standards, maintenance of the best corresponding mechanical operation conditions on a regular basis. The content includes monitoring the operation state, to supplement or replace the lubricant periodic disassembly inspection. Considerations overhaul operation, with rotation of the bearing sound, vibration, temperature, lubricant status, etc..
: Removing the lower bearing maintenance for cleaning of the bearing, the first record of the appearance of the bearing, to confirm the residual amount of the lubricant, the sampling after the check of the lubricant used, wash the bearing. As a cleaning agent, ordinary gasoline, kerosene.
The removed bearing cleaning, cleaning and fine cleaning sub-coarse, were placed in the container, first put the metal bottom of the network, bearing no direct contact with the container dirt. The rough cleaning the bearing with dirt rotation, will damage the bearing rolling surface, it should be noted. Rough cleaning oil, use a brush to remove to grease, adhesive material, generally clean, transferred to sperm washing.
Sperm washing, cleaning oil bearing while rotating, while carefully cleaning. In addition, cleaning the oil should be kept clean.
Bearing overhaul and judgment: In order to determine whether the removed bearing can be used to check bearing wash. Check raceway, rolling surface, with the surface state, cage wear, increased bearing clearance and damage decreased unrelated dimensional accuracy exception. Non-separable type of small ball bearings, the inner ring with one hand and the level of support the rotating outer ring to confirm whether smooth.
Tapered roller bearings and other separation-shaped bearing, rolling element, the outer ring raceway were examined.
Rotating the large bearing failure hand, pay attention to check the rolling body raceway to maintain the appearance of the rack, wall surface, the importance of bearing the higher the greater the need for careful checking.
Bearing lubrication purposes:
The rolling bearing lubrication to reduce friction and wear of the bearing internal to prevent sticking, its lubrication utility are as follows.
(1) to reduce friction and wear.
In constituting the bearing rings, rolling elements and a retainer of the mutual contact portions, to prevent metal to metal contact to reduce friction, wear.
(2) to extend the fatigue life.
The rolling fatigue life of the bearing, in rotation, the rolling contact surface of good lubrication, the extension. Conversely, the oil viscosity is low, the thickness of the lubricating film is not good, then the shortened.
(3) discharging the frictional heat, cooling.
Loop oiling method or the like can be oil discharge the heat generated by friction, or the heat coming from an external cooling. Prevent bearing overheating, aging prevent lube itself.
(4) Other
To prevent the intrusion of foreign matters inside the bearing, or prevent rust and corrosion effects. Lubrication method:
Bearing lubrication method, divided into grease and oil lubrication. In order to make the bearing play function, first, to select the appropriate conditions of use, the purpose of the lubrication method. If only to consider lubrication, oil lubrication lubrication dominant. However, the grease around the bearing structure can be simplified expertise, compare the pros and cons of grease and oil lubrication.
Bearing installation:
The bearing is installed correctly, affect the accuracy, life, and performance. Therefore, the design and assembly departments should fully study for the installation of the bearing. To be installed in accordance with the operating standards. Operating standards of the project is usually as follows:
(1) Clean the bearing and related parts;
(2) Check the connected components of size and finishing;
(3) Installation;
(4) Install a good bearing checking;
(5) The supply of lubricant.
I hope to be installed, just open the bearing packaging. General grease lubrication, cleaning, directly populate grease. The lubricating oil, Common without cleaning, However, the equipment used or the high speed with a bearing, etc., use clean oil wash, the anti-rust agent coated on the bearing is removed. Removing the rust inhibitor bearing rust easily, so can not be placed on regardless. Furthermore, a grease-sealed bearings, cleaning is not used directly.
The method of installation of the bearing, because the bearing structure, with different conditions, in general, due to the rotation of the multi-axis, so the inner ring needs interference fit. Cylindrical bore bearings pressed into the multi-purpose presses, or hot charging method. The occasion of the tapered bore, directly mounted on the taper shaft, or with the sleeve is mounted.
When mounted to the housing, generally clearance with multi outer amount of interference, usually pressed into the press, or are also shrink fit method installed after the cooling. With dry ice as the cooling agent, shrink fit installation of the occasion, the moisture in the air will condense on the surface of the bearing. So, you need the proper rust prevention measures.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7218CTYNP5 NSK | 90 | 160 | 30 |
| 7217ATYNP5 NSK | 85 | 150 | 28 |