I understand that we have to deal with the grinding wheel the used and we want to be mounted on a grinder (with less cover) which will enable us to continue the work of the grinding wheel.
I note that on each abrasive disc contains information with which maximum speed can work. If you mount the wheel on the machine's speed is higher than declared on the disc may be damaged wheel.
Can you use discs beyond the expiration date?
You can not use discs after beyond the expiration date.
Is it possible to cut the grinding wheel to grind?
On each wheel should be about restrictions apply. If the disc is a pictogram on the Prohibition of grinding, categorically must comply with that information. (see under "Product Identification