screwfeed

screwfeed

[′skrü‚fēd]
(mechanical engineering)
A system or combination of gears, ratchets, and friction devices in the swivel head of a diamond drill, which controls the rate at which a bit penetrates a rock formation.
References in periodicals archive ?
The Woodpecker automatic screwfeed system from Nascomatic Screwfeeding Systems, Nasco Industries Inc.