Hydraulic chucks are widely used in CNC machine tools. After a long time of use, the clamping will not be tight. In order to ensure that the chuck still has good accuracy in long-term use, smooth operation is very important. Incorrect or inappropriate smoothness will cause some problems such as: abnormal function at low pressure, weakened clamping force, poor clamping accuracy.

The hydraulic chuck is abnormally worn and stuck, so it is necessary to smooth the chuck correctly. Use chuck lubricating oil, it is necessary to clean the chuck body and slideway surface with an air gun or similar when the work is over. The use of cutting oil with anti-rust effect can prevent rust inside the chuck. In case rust will reduce the clamping force, special attention is necessary.

It is necessary to remove the hydraulic chuck for cleaning every six months, but if cutting cast iron, clean it once or more every two months. Check each part for cracks and wear. After the inspection is over, you must give the oil before you can set up.

1. Do a good job smoothly to ensure that the lathe chuck still has good accuracy after long-term use. But incorrect or improper smoothing will cause some problems, such as abnormal function at low pressure, weakened clamping force, poor clamping accuracy, abnormal wear and jam, so it is necessary to smooth the chuck correctly.

2. Apply molybdenum disulfide grease (black in color) once a day, and drive the grease into the nozzle of the chuck until the grease overflows the jaw surface or the inner hole of the chuck (the inner hole protective sleeve and the connecting nut). If the chuck is high-rotating or a lot of water-based cutting oil is used for processing, more smoothness is required, and the decision must be made according to different conditions.

3. After the chuck is finished, it is necessary to clean the chuck body and slideway surface with an air gun or similar.

4. Remove the chuck and clean it every 6 months (keep the sliding surface of the jaws clean) and make it smooth. If cutting cast iron is cleaned once or several times every 2 months, check the parts for cracks and wear. After the inspection is over, give enough oil to the assembly.

5. For different workpieces, use different clamping methods or make special fixtures. (The three-jaw chuck is only a general-purpose clamping fixture. If it is used to clamp irregular or odd workpieces, it will cause damage to the chuck.) If the chuck pressure is abnormal, the chuck will be under high pressure, or the machine will be under high pressure. The chuck will also clamp the workpiece after the table is shut down, which will reduce the chuck's use time.

6. The use of rust-proof cutting oil can prevent rust inside the chuck, because rust on the chuck will reduce the clamping force and make it impossible to clamp the workpiece.