Blades are notched-rim blades similar to Green Economy Blades, but
JB Blades are thinner. They are made for general lapidary use such
JB Blades are only available with a 1" arbor hole and do not
come with adapter bushings. If your arbor is smaller than 1",
you will either have to save the bushing from your old blade, find
one at a hardware store, or have a machinist friend make one for you.
JB Blades are made from steel and will have some minor rust spots,
but this doesn't effect their cutting ability at all.
We suggest using an oil-based coolant such as Rockhound
Oil to extend the life of your blades. Heavy cutting jobs require
the use of an oil-based coolant.