- Hello Customer - Log in or Register!
Relubrication of the bearing is the best in equipment downtime during implementation of the plan, and added on a regular basis, at the same time, cleared the old oil or through the drain the old oil out. Before joining fresh fat injection inlet should be clean. If no injection inlet KOYO bearings the box, you should open the housing cover or cover in order to remove the old grease, after cleaning, add fresh oil of the same model.
Regularly check the oil level and oil lubricants, under normal circumstances, the normal oil level oil level Windows for devices within ' or ' 1/3-2/3. Cup of the oil supplement method for oil, their ability to display fuel level represents only oil supplement, housing the oil level is to meet operational requirements, the oil level in the oil Cup less than one-fourth could be considered to make up the total volume of oil.
Check and fill oil, removed a small amount of lubricating oil as Lube samples and fresh compared to units can be in a position to consider oil quality testing is done in order to ensure the quality of qualified. If sample looks like cloud, then the results may be mixed with water, that is, we often say that oil emulsification, lubricant should be replaced at this time. If sample way dimming or changing the color of thick, so may indicate that the oil has begun to carbide should be completely replaced the old lubricant. If possible, use fresh lubricant to rinse the circuit. When replacing the oil, should make sure that the replacement of oil the old and the new of the same model, and meet the requirements of supplement the oil level.
1. the outer packaging is a clear
Under normal circumstances, factory brand has its own dedicated external packaging designed for designers and production plant for production of the conditional clearance arrangements, so Pack both from the line to the blocks of color are very clear, in no uncertain terms.
2. the stamped words is clear
Will bear the brand on the bearing body, label, etc. Font is very small, but being factory produced mostly using stamping technology, and not overheated before embossing, fonts are small, concave deep, crystal clear. Counterfeit products instead of fuzzy fonts, rough due to printing technology, fonts, floating on the surface, and some can even easily erased with his hand.
3. are there miscellaneous rings
Left hand holding the bearing body, right hand toggle coat makes it rotate, listen to their trash. As most of the production conditions of the counterfeit products fall behind, fully manual workshop operation, in the production process will inevitably be doped with impurities such as sand, hidden in the bearing body, so when rotated will issue a hybrid sound. This is to strictly enforce standards of production, are plant and machine operation between brands, a major difference.
4. surface is opaque oil stain
Buying bearings should pay special attention. Due to domestic currently of rust technology also not special home, so on bearing body for rust processing Shi is easy left thick thick of oil traces, took in hand Shang stick stick heavy heavy, and abroad original of bearing Shang almost see not to antirust oil of traces, was special carefully of expert said bearing smell up has a taste, certainly is Xia has antirust oil, just see not to just.
5. the chamfer is even
So-called bearing a chamfer, which is horizontal and vertical surfaces at the junction of counterfeit bearings due to limitations in technology, in the fringes of the site dealing with unsatisfactory.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| NNU4921 NTN | 105 | 145 | 40 |
| NNU4920K NTN | 100 | 140 | 40 |