Yes but if it’s placed on a smaller grinder it’s gonna run a hell of a lot faster than design speed.but at 6inch there only running at half the speed
Yes but if it’s placed on a smaller grinder it’s gonna run a hell of a lot faster than design speed.but at 6inch there only running at half the speed
yes faster but half the surface speed of the 12 inch so if the 12 inch grinder ran at just say 4000 rpm and the smaller grinder double the speed 8000 rpm the worn disc at 6inch will be the correct speed at that sizeYes but if it’s placed on a smaller grinder it’s gonna run a hell of a lot faster than design speed.
put a 6 inch disk on a 4inch grinder then your in real trouble
yes faster but half the surface speed of the 12 inch so if the 12 inch grinder ran at just say 4000 rpm and the smaller grinder double the speed 8000 rpm the worn disc at 6 inch will be the correct speed at that size
I do not know how people can use 12" discs on smaller machines as they have a different bore size (20mm) to 9", 7", 5" and 4 1/2" (22mm). I believe 4" is different again (16mm) and 14" abrasive chop saws different again (25.4mm).
I may be able to throw some light on this as I have asked one of our reps this question and he came back to me today.
Where a standard grinding disc is used it has a rubber based bond to hold the abrasive particles together and this has a lot of flexibility and can be self supporting and simply fitted into a grinder with just steel reinforcing around the mounting hole to spread the clamping force of the locking nut.
With thin discs there is insufficient thickness to create a self supporting structure and this requires a backing pad or disc and these come in two main types, GRP or epoxy and mostly they are GRP because its much cheaper than epoxy, with GRP you need a mat to create a solid base onto which the grinding medium can be attached and they make large sheets of GRP and the disc is cut out after curing, this means the edge of this disc is exposed and glass mat is exposed, which is absorbent and this absorbs water and over time this causes the GRP portion to delaminate.
Similarly, nobody ever uses a full disc all the time and at some point you will have a part used disc and having the same exposed edge also allows water or moisture into the glass matting and causes delamination.
If the GRP section delaminates it has to displace some or large parts of the abrasive material and this can fly off at over 300 MPH and this is apparently why they put dates on them as this is the period determined by the manufacturer at which they can be stored without delamination.