How To Inspect IKO Bearings After Installation
01/04/2024The Function Of Forklift Needle Roller Bearings And Installation Precautions
03/04/2024
- There are impurities in grease;
- Insufficient lubrication (the oil level is too low and improper storage causes oil or grease to leak through the seal);
- The bearing clearance is too small or too large (factory problem);
- Impurities such as sand or carbon particles are mixed into the bearing, which acts as an abrasive;
- Water, acid or paint and other contaminants are mixed into the bearings, which will cause corrosion;
- The bearing is pinched flat by the seat hole (the roundness of the seat hole is not good, or the seat hole is twisted and not straight);
- The pad iron on the bottom surface of the bearing seat is uneven (leading to deformation of the seat hole or even cracks in the bearing seat);
- There are debris in the bearing seat hole (remaining chips, dust particles, etc.);
- The sealing ring is eccentric (hits adjacent parts and causes friction);
- The bearing is subject to extra load (the bearing is axially tightened, or there are two fixed-end bearings on one shaft);
- The fit between the bearing and the shaft is too loose (the diameter of the shaft is too small or the adapter sleeve is not tightened);
- The clearance of the bearing is too small and it is too tight during rotation (the adapter sleeve is over-tightened);
- The bearing has noise (caused by the end face of the roller or the steel ball slipping);
- The thermal elongation of the shaft is too large (the bearing is subject to statically indefinite additional axial load);
- The shaft shoulder is too large (hits the bearing seal and causes friction);
- The shoulder of the seat hole is too large (distorting the seal of the bearing);
- The gap of the labyrinth seal ring is too small (friction occurs with the shaft);
- The teeth of the lock washer are bent (hit the bearing and cause friction);
- The position of the oil sling ring is inappropriate (hits the flange cover and causes friction);
- There are pits on the steel balls or rollers (caused by hitting the bearings with a hammer during installation);
- The bearing has noise (interference from external vibration source);
- The bearing changes color and deforms when heated (caused by using a spray gun to heat and disassemble the bearing);
- The shaft is too thick and the actual fit is too tight (causing the bearing temperature to be too high or making noise);
- The diameter of the seat hole is too small (causing the bearing temperature to be too high);
- The diameter of the bearing seat hole is too large and the actual fit is too loose (the bearing temperature is too high – the outer ring slips);
- The bearing seat hole becomes larger (the bearing seat hole of non-ferrous metal is enlarged or becomes larger due to thermal expansion);
- The cage is broken.
- The bearing raceway is rusty.
- Steel balls and raceways are worn (the grinding process is unqualified or the product is bruised).
- The ferrule raceway is unqualified (manufacturer problem).
