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Installation and precision confirmation test method for THK ball screw

Publish Time：

2022-01-06

　　As a transmission component, even if the THK ball screw itself has high precision, if the installation is not strictly measured and adjusted during installation, it will seriously affect the equipment's usage precision, leading to abnormal wear and tear, and drastically reducing its lifespan. It provides the equipment with feed speed and feed distance, playing a very important role in ensuring the equipment's operational accuracy. Therefore, please strictly measure the precision and adjust it during installation. Let's learn about the installation part precision confirmation test methods for THK ball screws!

　　THK Ball Screw Installation Part Precision Test Methods

　　On the other hand, the circular vibration of the component installation part relative to the axis of the ball screw shaft support in the radial direction

　　Support the support part of the ball screw shaft with a V-shaped bracket. Use a dial indicator to measure the larger difference in runout, making the dial indicator's pointer contact the outer diameter of the component installation part, while rotating the screw shaft of the THK ball screw one revolution.

　　II. Radial Circular Vibration of the Screw Groove Towards the Axis of the Ball Screw Shaft Support

　　Support the support part of the ball screw shaft with a V-shaped bracket. Make the dial indicator's pointer contact the outer diameter of the ball screw nut, and use a dial indicator to measure the runout difference when the screw shaft of the THK ball screw rotates one revolution without rotating the nut.

　　III. Perpendicularity of the Support Part End Face Relative to the Axis of the Ball Screw Shaft Support

　　Support the support part of the ball screw shaft with a V-shaped bracket. Make the dial indicator's pointer contact the end face of the shaft support of the THK ball screw, and use a dial indicator to measure the runout difference when the screw shaft of the THK ball screw rotates one revolution.

　　IV. Perpendicularity of the Flange Mounting Surface to the Axis of the Ball Screw Shaft

　　Next to the ball screw nut, support the outer diameter of the screw shaft threaded part with a V-shaped support. Make the dial indicator's pointer contact the flange end face of the ball screw nut, and use a dial indicator to measure the larger difference in runout when both the ball screw shaft and nut rotate one revolution.

　　V. Vibration of the Outer Circumference of the Ball Screw Nut on the Radial Circular Circumference of the Screw Shaft Axis

　　Next to the ball screw nut, use a dial indicator to measure the runout difference when the ball screw nut rotates one revolution without rotating the screw shaft, supporting the outer diameter of the screw shaft threaded part with a V-shaped support. Make the dial indicator's pointer contact the outer diameter of the ball screw nut.

　　VI. Parallelism of the Ball Screw Nut Outer Circumference (Planar Mounting Surface) Relative to the Screw Shaft Axis

　　Next to the ball screw nut, measure the runout difference when the dial indicator moves parallel to the ball screw shaft, supporting the outer diameter of the screw shaft threaded part with a V-shaped support. Make the pointer contact the outer circumference (planar mounting surface) of the ball screw nut.

　　VII. Total Runout in the Radial Direction of the Ball Screw Shaft Axis

　　Support the support part of the ball screw shaft with a V-shaped bracket. Use a dial indicator to measure the runout at multiple positions in the axial direction, making the pointer contact the outer diameter of the ball screw shaft, and obtain the largest value when the screw shaft rotates one revolution.

　　The above is an introduction to the installation part precision confirmation test methods for THK ball screws. For more information, please contact us anytime!

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