Ballscrew End Machining Runout

With the rapid development of technology, the need for precise and fast production is increasing day by day. In order to achieve this speed and precision, it is necessary to use advanced technology products in the movement axes of the machines.

Today, the main axis drive systems used in machines are as follows.
1- Belt – Pulley
2- Screw Shaft
3- Rack-Pinion
4-Chain Gear

Moving the load with the ball screw enabled the machines to be able to position very precisely.

However, in order to make a correct production, the ball screw must move with high precision.

Ball screw can be divided into two groups as grounded and rolled.

Grounded type ball screws are the most accurative and precise group because they are produced by completing the end machining while the ball channels are being made.

Rolled-type ball screws are usually produced between 1500mm and 6000mm for easy keeping in stock.

Finally, it is sized and end machined according to the customer’s request.

After this point, the most important part is the correct processing of the ball screw end machining.

If the machine or the person doing the machining is faulty, the ball screw cannot be machined within the desired tolerances.

In addition, when ballscrews are not fixed correctly on the lathe can cause runout and become unusable as a result.

Run-out machined ball screws can make excessive noise or deform the ball screw nut too quickly.

In the videos below, you can see incorrectly machined ball screws.

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