### TECHNICAL NOTES 8 GRINDING R. P. King - Mineral Tech

The critical of the , & c, is defined as the at which a single will just remain against the wall for a full cycle. At the top of the cycle =0 and Fc Fg 8.5 mp & 2 cDm 2 mpg 8.6 & c 2g Dm 1/2 8.7 The critical is usually expressed in terms of the number of revolutions per second Nc & c 2 1 2 2g Dm 1/2 2×9.811/2 ...