Bible Dictionaries
Temper Screw

Webster's Dictionary

(1):

A screw link, to which is attached the rope of a rope-drilling apparatus, for feeding and slightly turning the drill jar at each stroke.

(2):

A set screw used for adjusting.

Bibliography Information
Webster, Noah. Entry for 'Temper Screw'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​t/temper-screw.html. 1828.