How to maintain hydraulic chuck

Hydraulic chucks are widely used in CNC machine tools. If they are used for a long time, they will not be clamped tightly. In order to ensure that the chuck still has good accuracy in long-term use, lubrication is very important. Incorrect or inappropriate lubrication will lead to problems such as abnormal function at low pressure, weakening of the clamping force, and poor clamping accuracy.

Hydraulic chucks wear and seize abnormally, so it is necessary to lubricate the chuck correctly. Use chuck lubricant, and be sure to use an air gun or similar tool to clean the chuck body and slide surface after work. Using cutting oil with anti-rust effect can prevent rust inside the chuck. If rust occurs, the clamping force will be reduced, so special attention must be paid.

The hydraulic chuck chuck must be removed and cleaned every six months, but if cutting cast iron, it must be cleaned once or more every two months. Check all parts for cracks and wear. After the inspection is completed, oil must be supplied before assembly.

1. Doing a good job of lubrication can ensure that the lathe chuck still has good accuracy after long-term use. However, incorrect or inappropriate lubrication will cause some problems, such as abnormal function at low pressure, weakened clamping force, poor clamping accuracy, abnormal wear and jamming, so the chuck must be lubricated correctly.

2. Apply molybdenum disulfide grease (black in color) once a day, and drive the grease into the chuck oil nozzle 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 rotates at high speed or a large amount of water-based cutting oil is used for processing, more lubrication is required, which must be decided according to different conditions.

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

4. Remove the chuck, separate and clean it every 6 months (keep the sliding surface of the clamp jaw clean) and lubricate it. If you are cutting cast iron, clean it thoroughly once or more every 2 months and check all parts for cracks and wear. After the inspection is completed, it must be fully refueled before assembly.

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

6. Use anti-rust cutting oil to prevent rust inside the chuck, because rust in the chuck will reduce the clamping force and make it impossible to clamp the workpiece.