The main reason for the sliding of the workpiece is :
- The mater jaw stroke is insufficient: Make arrangement such that when workpiece is chucked, the master jaw will be in the neighborhood of the strike center to ensure the clamping force is sufficient.
- Chucking force is insufficient: Confirm whether the set hydraulic pressure is reached.
- Formed dia of the top jaw does not match workpiece dia.: Perform reforming based on correct forming method.
- Cutting force excessively high: Recalculate cutting force and confirm whether the force methods chuck specifications.
- Insufficient lubrication on master jaws and each slideway: After re-lubricating the parts, perform lubrication from the grease nipple and perform chucking operation of pawls several times with no workpiece held in the chuck.
- Speed is excessively high: The higher rotary speed, the smaller clamping force. It is recommended to reduce speed to the level where necessary chucking force can be obtained.