What is the safest way to remove chips from a lathe or milling machine?

Using a brush is the safest way to remove chips from a lathe or milling machine due to its ability to allow the operator to maintain a safe distance from moving parts while effectively managing the chips. The brush can be used to sweep away the chips without the risk of entanglement in the machine's components. It also provides better control over the debris, reducing the likelihood of sudden movements that could occur if using hands directly.

Other methods, such as using a suction device or vacuum cleaner, while effective, might not provide the same level of control and could pose risks if not properly managed around moving parts or if the equipment is not designed for that environment. Manual hand removal can be the least safe option, as it requires direct contact with the machine, increasing the risk of injury from moving components. Therefore, using a brush is the preferred method as it ensures safety while maintaining cleanliness at the workstation.