The Toyoda GL-4A grinders use an 18" diameter vitrified wheel
with faces that range from 1" to 4.5".
The "new bond" in the address came from development of the first vitrified wheel
developed by an employee, Swen Pulson.
are not affected by water, oil or acid and may be used in all type of grinding operations.
Norton BCG centerless vitrified wheels
with Vortex technology are versatile because one wheel grade is able to produce the finish and performance of two or more conventional centerless wheels.
Resinoid bond: Resinoid bonded grinding wheels are second in popularity to vitrified wheels
. Phenolic resin in powdered or liquid form is mixed with the abrasive grains in a form and cured at about 360F.
Some wheels are quite brittle; the bond in vitrified wheels
is similar to glass and can be easily broken.
The solution to this problem: vitrified wheels
. This aggressive and free cutting bond structure adapts to various spindle speeds with minimal adjustments; porosity minimizes wheel loading during the grinding operation; and its free cutting nature eliminates the time and delays associated with frequent wheel dressing.
Notably, allowable surface speeds for vitrified wheels
, with their more brittle bond construction, are lower than for resin-bond wheels.
are trued and dressed in the same operation.