Ordered few via Banggood. Dirt cheap. Diameter 150 mm.
What are reasonable speeds of rotation for said discs?
I have motor with large pulley, entire setup was assebled in such a way that once discs have arrived, they will be supported by/fitted to side of pulley.
Side supportive surface of the pulley will be made flat and I will ensure, it runs true.
Cooling bath can be provided (wheel would be partially immersed in it).
Decent grinding table will be arranged.
Intention is to have realiable setup for grinding and lapping carbide tools, carbide inserts, also these tipped with CBN, HSS, and odd surface grind job on small items to remove machining marks.
I have *slow* rotating motor (700rpm, 3phase, 1/4Hp), can double the speed or go down to 100-200 rpm with frequency modulator.
Now what do you think about such a slowly rotating setup?
Diamond wheels are known to be used up to 15m/s. This setup will rotate up to 1 m/s.
High speed of metal removal is not my priority here. It is also known that lapping is done at low speed to work well. Cooled wheels are also moving slow on many machines, eg those used for knives sharpening. Fast grinding of steel with diamonds is also problematic because steel dissolves diamond at temperatures involved, hence CBN is often used because diamond doesnt last long enough.
Do I have a chance to achieve expected results with proposed setup, or such a slow grinding machine is just a nonsense?
Martin