Those would more likely be for a small centerless or cylindrical grinder.
The G103 doesn't seem to mean anything of importance, probably just a production code of sorts. Norton made and continues to make a LOT of non-stocked standard wheels for all sorts of special applications.
In the "39C601-K8VK" the "39C" suggests it the 39C Crystalon, a silicon carbide abrasive good for carbide, tunsten and other dense materials. Is it a dark gray or green wheel?
The "601" part confuses me because that's usually a two-digit number or a zero in the third position if a 3-digit extra fine grit. It's grit size, and either it's a 60 grit or a super-fine 600. I tend to think it's a variation of 60 grit.
The "K "means it's a fairly hard bond, on the upper part of that scale for vitrified wheels.
The "8" means it's a free-cutting, relatively open wheel. More air spaces between the abrasive grains and bond gets an 8 to 12 (higher is more open), less air space and higher density gets a lower number.
The size is unusual. Being 6" in diameter but 3" wide is what has me thinking small centerless grinder. The 32mm bore lends me to think it's for a European made machine. You may not ever find the application, so just take some good photos and put them out there on eBay.
The G103 doesn't seem to mean anything of importance, probably just a production code of sorts. Norton made and continues to make a LOT of non-stocked standard wheels for all sorts of special applications.
In the "39C601-K8VK" the "39C" suggests it the 39C Crystalon, a silicon carbide abrasive good for carbide, tunsten and other dense materials. Is it a dark gray or green wheel?
The "601" part confuses me because that's usually a two-digit number or a zero in the third position if a 3-digit extra fine grit. It's grit size, and either it's a 60 grit or a super-fine 600. I tend to think it's a variation of 60 grit.
The "K "means it's a fairly hard bond, on the upper part of that scale for vitrified wheels.
The "8" means it's a free-cutting, relatively open wheel. More air spaces between the abrasive grains and bond gets an 8 to 12 (higher is more open), less air space and higher density gets a lower number.
The size is unusual. Being 6" in diameter but 3" wide is what has me thinking small centerless grinder. The 32mm bore lends me to think it's for a European made machine. You may not ever find the application, so just take some good photos and put them out there on eBay.