tractor drill

tractor drill

[′trak·tər ¦dril]
(mechanical engineering)
A drill having a crawler mounting to support the feed-guide bar on an extendable arm.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Until the 1940s, tractor drills could be equipped with optional seats and horse hitches, while many of the hand-lift horse versions could be ordered with tractor hitches.
Grain drills brought innovation to spring planting
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