a. The large winding drum on which the drill cable or bull rope of a churn or cable-tool drill is wound. Long
b. Large sheave at the top of the mineshaft headframe over which the cage- or skip-hoist rope passes. Long
c. An underground sheave wheel; particularly, the wheel around which the tail rope is passed beyond each terminal of a tail-rope haulage system.
d. The pulley that rotates the camshaft of a stamp battery. Nelson
Source:
Dictionary of Mining, Mineral, and Related Terms












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