Diamond saws often seem to stall easily, they seem to have insufficient torque, why?
The brief answer is: because diamond “cutting” is grinding and not cutting. Speed is more important than torque. Push lightly and maintain speed is the trick. That’s the theory anyway … The more detailed answer: Too long to list here, but we’ll give it anyway 🙂 What removes material is the work the cutting tool puts in it. The productivity, or cutting rate, is the measure of material removed per unit of time, i.e. work per unit of time, i.e. power. In theory, you could calculate the rate of work (power) delivered to the rock by multiplying the blade speed by the force with which the blade rubs against the rock times the energy transfer efficiency. So much for a nice and simple theory! In reality, the situation is more complicated than such a simple minded formula. Firstly, the there is no simple way to evaluate the energy transfer efficiency. That varies wildly with the cutting method, i.e. carbide or diamond, with the mechanical properties of the rock, i.e. hardness, coherence, mi
