i bought a narrow one and found out one the reason for the wide size: my grinder cant hold the narrow one tight enough.
i measured the discs accurately with a ruler and found they are actually 3.5(wide one) & 1.5(narrow one) mm wide
i mounted a narrow one this evening. lucky for me i checked the disc after mounting to see if it was firmly held in grinder.i found it could rotate with slight effort from my hand! i didnt try cutting with it as i imagined it would bind instantly.
> i was using 5mm wide iron cutting discs for cutting bars so far but i > saw 2.5mm discs
> in a shop which cost the same.
> wont a thinner disc cut metal bars faster and put less load on the
> motor and less heat in the bar?
> why do they make 5mm cutting discs then? are they less prone to
> blowing up than 2.5mm? or is it cause they have a longer life?
> same manufacturers(e.g. bosch,wurth) make both types, so what
> applications is one supposed to be better than the other at?