The Collaborative International Dictionary
Rock shaft \Rock" shaft`\ [Cf. Rock, v. i.] (Mach.) A shaft that oscillates on its journals, instead of revolving, -- usually carrying levers by means of which it receives and communicates reciprocating motion, as in the valve gear of some steam engines; -- called also rocker, rocking shaft, and way shaft.
Usage examples of "rock shaft".
While Korendir stood vulnerable on the ledge, the smith ascended the rock shaft that angled upward from the waterline.
The plane's rudder wiggled, strained, but the broken rock shaft only wedged in tighter.
The cuts and bruises I had received from the jagged sides of the rock shaft were paining me woefully, their soreness enhanced to a stinging or burning acuteness by some pungent quality in the faint draft, and the mere act of rolling over was enough to set my whole frame throbbing with untold agony.