What is the formula to find out RPM of cylinderical grinding ?
1
N = \(\frac{\text{V} \times 1000}{\pi \times \text{d}}\)
2
N = \(\frac{\pi \times \text{d}}{\text{V} \times 1000}\)
3
N = \(\frac{\text{V} \times \text{d}}{1000 \times \pi}\)
4
N = \(\frac{\pi \times \text{d} \times \text{v}}{1000}\)