When designing a CNC turned stainless steel part for automation, there are several important factors to consider：

1. Material selection: Stainless steel is a popular choice for its corrosion resistance and durability. However, there are different grades of stainless steel available, each with its own properties. Consider the specific requirements of your application and select the appropriate grade of stainless steel accordingly.

2. Dimensional accuracy: Precision is crucial in CNC machining. Ensure that the part's dimensions are accurately defined in the design, taking into account the tolerances required for your application. This will help to ensure the part fits properly and functions correctly within your automation system.

3. Machining features: Determine the necessary features and geometries of the part. This includes holes, threads, slots, and any other specific requirements. Communicate these details clearly to the CNC machinist to ensure the part is manufactured correctly.

4. Surface finish: Consider the desired surface finish of the part. Stainless steel can be machined to various levels of smoothness, ranging from rough to mirror-like. The surface finish can affect the part's appearance, functionality, and ease of cleaning.

5. Mounting and assembly: If the part needs to be mounted or assembled within an automation system, design it with appropriate features such as holes, slots, or threads for easy integration. Consider how the part will be secured and ensure proper alignment with other components.

6. Weight and balance: Depending on the application, the weight and balance of the part may be important. Ensure that the design takes into account the weight distribution and any necessary counterbalances to ensure smooth operation within the automation system.

7. Cost-effectiveness: While designing the part, consider the manufacturing process and aim for a design that minimizes material waste and machining time. This can help reduce costs and improve the overall efficiency of production.