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NTN Bearing Temperature Difference Method

wallpapers News 2020-12-21
In the assembly where the tapered bearing is difficult to assemble, the pre-tightening force NA of the tapered bearing directly affects the state of the driving bevel gear transmission system and the transmission accuracy.
 
The NTN bearing oil heating method is the most commonly used method of temperature difference. The heating oil should be non-corrosive mineral oil, and the flash point of the transformer is preferably above 250 degrees. When assembling the bearing, the oil bath heating method can be used. When disassembling NTN bearings, you can use the heating method of hot oil pouring.
 
When using an oil bath to heat NTN bearings, a thermometer should be used to control the oil temperature to prevent overheating. At the same time, the bearing should be placed on a sieve or bracket 50-70 mm from the bottom of the box. Do not directly touch the bottom of the box to prevent local temperature rise of NTN bearings. The rise is too high and is affected by dirt in the oil.
 

NTN bearing anti-wear and extreme pressure additives can generally be divided into two categories: oily agents and anti-wear extreme pressure agents:
 
Oily additives: NTN bearing oily additives form a physical adsorption film on the metal surface to improve the friction function of the metal contact surface and enhance the lubrication effect. Commonly used oily additives include: animal and vegetable oils, higher fatty acids, esters, alcohols and other metal soaps.
 
Antiwear agent and extreme pressure agent: NTN antiwear agent and extreme pressure agent are mainly organic compounds with strong chemical activity. This compound has no lubricating effect at room temperature, but will produce a relatively dense chemical film on the metal surface under high temperature and pressure. The film generally has a lower melting point than the original metal material and has a lower shear strength. The metal surface will wear and prevent scratches when rubbed.

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