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What is the most common cause of ball screw failure?

October 30, 2024
Ball Screw Troubleshooting

Ball Screw Failure Types

1. Wear - related Faults

1) Ball wear

The wear on the surface of the balls causes an increase in the clearance of the ball screw and ball nut assemblies, which in turn affects the transmission accuracy and stiffness.

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2) Ballnut wear

The wear of the internal thread within the nut decreases the contact area with the balls, thus influencing transmission efficiency and lifespan.
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3) Raceway wear

The wear caused by the rolling of the balls in the raceway of the ball screw kit leads to the appearance of grooves on the surface of the ballscrew.

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ball screw failure

2. Deformation-related Faults

1) Bending of the ball screw shaft

Due to improper installation, uneven force, or temperature changes, the ball screw shaft undergoes bending deformation.

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2) Ball nut deformation

Excessive pressure or impact on the nut deforms its internal thread, which in turn affects its mating with the balls.

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3) The ball is flattened

When the ball is subjected to excessive pressure, it gets flattened and deformed, affecting its rolling performance and service life.

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3. Fracture - related Faults

1) Fracture of the ball screw shaft

Due to overload, fatigue, or material defects, the screw shaft fractures at a certain position.

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2) Fracture of the ball nut

Excessive internal stress or impact within the nut causes it to fracture, making it unusable.

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3) Fracture of the balls

The balls crack when subjected to strong impact or overload, affecting the transmission and accuracy of the ball screw pair.

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4. Other Faults Type

1) Poor lubrication

Due to insufficient lubricant or contamination, the friction of the ball screw set increases, affecting the transmission efficiency and service life.

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2) Improper assembly

Due to failure to operate to specifications during installation, the linear ball screw has a poor fit, resulting in abnormal noise or jamming.

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3) Vibration and Noise

Due to the vibration and noise generated by the Ball Screws Cnc Router kit during high-speed operation, the normal operation and use of the equipment are affected.
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