If the centrifuge is not used properly in the laboratory, the rotor will be unable to take out and the experiment process will be delayed. Generally, the main cause of unable to remove rotor is the adhesion between the spring chuck and the motor spindle. In last article we introduced 2 methods, and in this article we will show the following introduction.
3. Key points
3.1 In any case, the replacement screw must be screwed into the thread hole of the spindle in order to protect the spindle thread and the original locking screw. Otherwise, in case of damage to the original thread, it may be made into motor scrap.
3.2 Force to understand the appropriate, not brute force smash. When the resistance is too high, the time of rust removal and invasion can be prolonged.
3.3 After the rotor is taken out, the outer surface layer of the main shaft and the surface layer of the inner hole of the rotor shall be polished with fine sandpaper to remove the rust and apply grease to prevent the bonding again.
4. Preventive measures
4.1 To enhance the daily maintenance, the joint surface of the rotor and the main shaft should be wiped clean and coated with grease.
4.2 Especially for high-speed refrigerated centrifuges, do not close the cover door immediately after use, but let the moisture, condensate and corrosive gas in the centrifugal chamber evaporate completely and return to normal temperature before closing the cover door.
4.3 After each centrifugation, take out the rotor as soon as possible. If a rotor is not replaced or taken out for many days, it is very easy to cause adhesion. In the most serious case, the whole machine will be scrapped.
4.4 Each time the screw is tightened, do not use too much force. Otherwise, it will cause the screw sliding thread trip, and in serious cases, the motor will be scrapped. When the motor rotates counter clockwise, the inertia screw itself will produce a clockwise tightening force, which can just make the rotor be tightened. Therefore, when tightening the rotor, it is only necessary to feel a slight effort on the wrist.
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