Always use end mills and router bits under recommended cutting conditions.
Improper use of end mills and router bits or application of inappropriate cutting conditions may cause the tool to break and be expelled from the machine risking injury to operator or bystanders.
Never make contact with the spinning end mill or router bit.
Never attempt to tighten or adjust spindle or router nuts using machine power.
End mills and router bits have very sharp cutting edges. Handling them with bare hands may cause injuries. Always wear gloves or use a cloth when installing or storing them.
Never adjust your work piece or your mounting devices while operating your machine.
When setting up your work piece, always install the end mill or router bit last to avoid being injured.
Always shut the machine off before making any adjustments or measurements.
End mills, router bits and work pieces can become extremely hot during cutting. Touching them with bare hands can cause severe burns.
Routers or spindles with poor balance or off center revolving of end mills and router bits can cause vibration and chattering which could cause the tool to break and be expelled from the machine.
Always use end mills or router bits within the recommended cutting speeds and within the range of recommended cutting conditions.
Make sure no screws, clamps or other obstructions are in the path of the end mill or router bit. These obstructions can break the end mill, which is capable of flying off and hitting someone.