G.Ratio = (WW1-WW2) / (DW1-DW2)
The G.Ratio more bigger, means the grinding discs can do more grinding works.
But G.Ratio is not the absolute index when measure the grinding discs performance, there are also others factors such like grinding speed, hand-feeling, vibration, etc to judge the comprehensive performance of grinding discs.
For example: A grinding discs can remove 100g work-piece in 10 minutes and itself weight consume 10g, the G.ratio=100g/10g=10, B grinding discs can remove 200g work-piece in 10 minutes but itself weight consume 25g, the G.weight=200g/25g=8. If only said G.ratio, seems the A is better than B, but we must see that - the B ginding discs have higher working efficence and will save your working time and labor cost.
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