14"?? The biggest we use is a 9" and its probably one of the most dangerous bits of gear in school. Some tips from the teacher:
- Safety gear is imperative as the guys have already mentioned, and wear ear muffs, they will easily damage your hearing.
- Get in a comfortable position first, don't hold it in ridiculous positions and be very aware of where the cord is.
- Treat everyone around you like an idiot as someone bumping or distracting you can be very bad.
- Beware the exploding cutting disc!!
Mess with the bull, get the horns!