[TheForge] Binders on Abrasive wheels

[Charles]

The binder varies depending on how fast of a cut the wheel is designed for.  A real fast cutting wheel can have a soft binder.  This means new edges are being presented constantly rather than having to wear through dull edges on the cutting particles. 

Charles 


________________________________
 From: Peter Fels & Phoebe Palmer <artgawk at thegrid.net>


Query: I pulled an old ( don't know how old...WW2 old?) 8"X1" grinding wheel out , dug up
some centering hardware and hung it on my bench grinder.
It cuts gratifyingly quickly on hard steel!!     It also wears really fast!
Looks to be around 60 grit with darkish grains in a grey matrix.
I'm wondering if the binder has gotten soft with age and it's dangerous?