The feed size for a ball mill generally falls within the range of 1-2 inches (25-50 mm) for large mills, but this can vary depending on the mill design and the material being processed. For smaller mills, the feed size may be smaller. It's important to follow the specifications provided by the manufacturer for optimal performance. If you're processing a very fine material or seeking to produce a very fine product, the feed size may need to be adjusted accordingly.
