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Bearing after installation, to check for proper installation, operation check. Small machinery can be rotated by hand to confirm whether it rotates smoothly. Check project are caused by foreign bodies, scar, indentation to seize up, by poor installation, mounting bad moment of instability arising from processing, due to the clearance is too small, installation error, caused by seal friction torque is too large, and so on. Without exception you can start power operation.
Bearing temperature, generally according to the external temperature of the housing speculation. Oil hole direct measurement of SKF bearings temperature more accurately. Bearing temperature, work gradually began to rise, usually temperature-stable after 1-2 hours. If adverse bearing installation, temperature rises dramatically, unusual high temperatures. Its causes, such as excessive grease, the bearing clearance is too small, poor installation, excessive seal friction. High speed rotation, bearings, lubrication and a cause, such as selecting the wrong way.
Turning bearing sounds with a stethoscope to check, with strong metal noises, different sound irregular sound note exceptions. Due to poor lubrication, shaft or housing poor accuracy, bearing damage, intrusion of foreign bodies, etc.
Check the bearing without bearing environments exposed to contaminants or moisture. If the work is interrupted, the paper should be plastic or similar material of his machine. In cases where that may perform checks without dismantling cleaning bearings without masking, picking oil solvent coating with a brush, then wipe dry with a lint free cloth or compressed air to dry (be careful not to let the bearing Assembly rotate). With a small mirror and a similar probe of the kind used by dentists to examine the track side of the bearing and cage and beads. Could not be cleaned and sealed bearings with cover or dust; just wipe the external surface. If the bearing is damaged or needs replacing. Replace bearings in a regular outage maintenance period than suddenly, due to damage to the selected loss of economy.
Of not only against the bearing lubricant is very important, also for all bearings. But please note that the bearing should not add too much grease. And then replace the bearing lubricant. Oil lubricated bearings, after purging the old engine oil, if possible, should be poured into the fresh engine oil and make the machine at low speed spin for a few minutes. Oil collecting residual contaminants as much as possible and then purging these oils. Use grease-lubricated bearings when replacing the grease, used by Joe you should avoid contact with cotton in addition to any part of the bearing. Fiber because these residues may be wedged in between the rolling and cause damage, especially application of bearings but also should pay attention to this issue.
Bad bearing not only the surface quality of the workpiece, and Crystal asked corrosion resistance of workpiece falling. When the bearing serious overheating the workpiece produces large grain and 8 cable volume increases in steel, easily lead to workpiece hot workability deteriorated. Lcrl8Ni9Ti stainless steel with the body or flanges when there is a hot, easy to produce orange peel surface defects.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| NNU4938 NTN | 190 | 260 | 69 |
| NNU4936K NTN | 180 | 250 | 69 |