This "chop saw" may be used ONLY for cutting steel. Cutting any other material is dangerous and will ruin the expensive blade.
This machine is a Milwaukee model 6176.
Manuals can be found http://makerspace.tulane.edu/index.php/File:Milwaukee_14_inch_cutoff_saw_6176-20.pdf
Click here PPE for training (badge) levels and requirements and Personal Protective Equipment.
Replacement cutoff wheels for this saw should be 14" diameter, 3/32" thick with a 1" arbor, and can be ordered from Fastenal or McMaster.