FAQ: Express Dual

FAQ: Express Dual

The stone won’t move along the shaft properly (It “shudders” or sticks as it tries to traverse along).


Friction caused by trying to move along a dirty or improperly cleaned mainshaft. Clean out below the sleeve with WD40. Spray fluid into the gap between sleeve and mainshaft from each end. Work the sleeve and nut back and forth along the shaft and spray again. Spray and clean the whole mainshaft and move the sleeve and nut along the whole length of the mainshaft. Wipe off any excess fluid. (In extreme case the sleeve and nut may have to be removed for absolute cleaning).








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