Polishing Copper and Brass Parts with Ease: A Step-by-Step Guide to Vibratory Finishing

Update:04 May 2023

Copper and Brass

Copper and brass parts are widely used in various industries, including automotive, aerospace, and decorative arts. These metals have a unique color and luster, which can be enhanced by polishing. Polishing copper and brass parts can not only improve their aesthetics but also provide protection against corrosion and wear. In this article, we will discuss how to polish copper and brass parts using a vibratory finishing machine.


Step 1: Selecting the appropriate media and compound


The first step in polishing copper and brass parts is selecting the appropriate media and compound for the vibratory finishing machine. There are various types of media and compounds available for polishing, and the selection depends on the type of part, the desired finish, and the material being polished.


For copper and brass parts, we recommend using ceramic media with a polishing compound. Ceramic media is ideal for polishing copper and brass as it is hard enough to remove surface imperfections and produce a high shine. The polishing compound is essential as it provides a lubricating effect, which reduces friction between the media and the parts, preventing damage to the surface of the parts.

media and liquid


Step 2: Loading the parts and media into the vibratory finishing machine


After selecting the appropriate media and compound, the next step is to load the parts and media into the vibratory finishing machine. It is essential to load the parts and media in the right ratio to ensure that the parts are polished uniformly. Typically, the ratio of media to parts is around 3:1.


Before loading the parts, ensure that they are clean and free of any dirt or debris that could cause damage to the surface during the polishing process. Also, ensure that the parts are not too large for the vibratory finishing machine's chamber, as this could cause damage to the machine or the parts.


Step 3: Setting the machine to the appropriate settings


Once the parts and media are loaded into the machine, it's time to set the machine to the appropriate settings. The vibratory finishing machine has several settings that can be adjusted, including speed, amplitude, and time. The settings depend on the type of part being polished and the desired finish.


For copper and brass parts, we recommend setting the machine to a low speed (around 1200 RPM), low amplitude (around 1/16 inch), and a longer time (around 6-8 hours). The longer time allows the media and compound to work on the parts, producing a high shine and removing any surface imperfections.


Step 4: Monitoring the progress of the polishing process


During the polishing process, it is essential to monitor the progress of the parts' polishing regularly. Check the parts every hour or so to ensure that the parts are being polished uniformly and that there are no scratches or damage to the surface. If any damage or scratches are detected, stop the machine immediately and inspect the parts.


Step 5: Rinsing and drying the parts


After the parts have been polished for the desired time, remove them from the vibratory finishing machine and rinse them thoroughly with water to remove any remaining compound or media. Dry the parts using a clean towel one by one or using our dryers, ensuring that there is no water remaining on the surface.


Step 6: Applying a protective coating

before and after

To protect the polished copper and brass parts from corrosion and wear, it is recommended to apply a protective coating. There are various types of protective coatings available, including clear lacquer, clear powder coating, and wax. The selection depends on the desired finish and the environment in which the parts will be used.




Vibratory finishing is a highly effective process for polishing copper and brass parts. The process involves using abrasive media and a vibratory machine to smooth and polish the surface of the parts. The process can be customized based on the specific requirements of the parts and the desired finish.


When using a vibratory finishing machine for copper and brass parts, it is important to select the right media, compound, and process parameters. It is also essential to properly clean and dry the parts before and after the finishing process.


By following these steps, it is possible to achieve a high-quality, uniform finish on copper and brass parts. With the right equipment and expertise, vibratory finishing can be a cost-effective and efficient way to improve the appearance and functionality of these parts. Welcome to contact us for your vibratory finishing today!


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