Just because I find the old names for occupational diseases so colorful and informative and because i lost one grandparent to black lung and another to the pathological effects of Chromium plating. I looked up a few in an old pulmonary medicine text. Before the age of respirators when it was typically a piece of cloth at most and more typically nothing at all that constituted lung protection, the following diseases were attributed to metal grinding.
Grinder's Asthma-The aggregate of functional phenomena, induced by the inhalation of particles thrown off during the operation of grinding metallic instruments, etc. The structural changes induced are enlargement of the bronchial tubes, expansion of the pulmonary tissue, and phthisis. [Dunglison1874]
Knifegrinders Disease- A form of mechanical or chronic catarrhal bronchitis incident to a knife grinders occupation. [Appleton1904]
Knifegrinders Rot-Silicosis
Siderosis-Fibroid phthisis caused by the inhalation of steel, iron or iron oxide particles. [Kober1916]. Chronic inflammation of the lungs caused by excessive inhalation of dust containing iron salts or particles. [Heritage].
And remember when you are inhaling that dust from your grinder you are also inhaling the dust/grit from the belt itself being worn away and that leads to a whole slew of even more pathology most notably silicosis.
Remember these are all horrible ways to die. It is a slow suffocation, where you can never quite get enough breath as your lungs become stiff and inelastic, covered in mucus and lesions unable to get enough oxygen to your body. I saw both my grandparents die from pulmonary disease as a child in England and it is horrible horrible stuff. Now these illnesses have more up to date names and some treatment is available but no cure other then transplant and all will kill you slowly gasp by painful gasp. I hope I made my point.