Our version of the facts on application and use of Plated bond Grinding wheels
Metalcore super abrasive wheels. (We like Aluminum)
Metal Plated bond Superabrasive wheels are designed to be run concentric in a thermally controlled condition as the cannot be shaped into true like with traditional truing methods and as they surface doesn’t breakdown like a vitrified wheel — friable.
Steel VS Aluminum
Nickel to Steel has always been a chemically ideal situation, thus it was
a natural first stop for plated bond wheels.
Only recently have the manufacturing processes improved
making it possible to develop a 100 percent strength bond between aluminum and nickel.
Now that this is a fully mature process aluminum brings certain Prefered physical attributes
In an environment where accuracy and Heat are vital considerations Aluminum wins the day
store less kinetic energy
better heat dissipation
same or better tensile strength that steel wheels
If the grinder has the torque and smoothness/accuracy of runout the result is longer life and a more accurate grind /finish
Variable Speed DC Grinders
Traditional AC induction motor Grinders were not designed with Plated wheels in mind. Their shaft accuracy speed is suited to for a Vitrified wheel which can be trued in place with diamond or another wheel truer and must be constantly maintained for shape.
Plated Bond wheels are good for shape retention and when mounted on a machine designed to present the best speed, torque and run out characteristics. In this situation smooth accurate material removal can be achieved in most all materials, Tool Steels, Carbide, Plastics, carbon fiber non-ferrous metals not possible with vitrified mineral wheels at high speeds.
Recent advances in electroplating technology have made possible the electroplating of CBN particles to aluminum.
Aluminium can be machined to finer tolerances than steel resulting in a Truer running wheel resulting in less tool bounce than on a steel wheel.
Aluminium transfers heat about 7 times faster than steel. When combined with CBN which conducts heat 20x faster than copper to the aluminium you can sharpen at a cooler temperature with less risk of tool damage compared to a steel wheel.
An aluminium wheel is 40% lighter in weight than a steel wheel. This weight reduction puts less stress on the grinder bearings and reduces the free wheeling time needed for the grinder to stop.
The radius edge allows sharpening of complex profiles by laying the tool flat on the grinder tool rest and simply guiding the tool edge along the radius.
The radius edge is safer than a sharp cornered wheel in case of accidental body contact.
Metal wheels are much safer than aluminium oxide wheels as they do not come apart or potentially disintegrate.
Unlike Aluminium oxide wheels, CBN wheels do not need to be dressed and the face remains flat and true.
Metal wheels do not wear down and therefore do not reduce in diameter with use like aluminium oxide wheels. Therefore sharpening jig set-ups remain the same with constant diameter metal wheels.