drill carriage

drill carriage

[′dril ‚kar·ij]
(mechanical engineering)
A platform or frame on which several rock drills are mounted and which moves along a track, for heavy drilling in large tunnels. Also known as jumbo.
References in periodicals archive ?
The drill carriage travel utilizes a special rack and pinion system, eliminating the usual problems associated with a chain drive.
Barbco's new BD60 Plus-20SC directional drill is armed with six drill carriage motors and delivers a constant 60,000 pounds of thrust and pullback with reserves up to 90,000 pounds.
With six drill carriage motors, the BD60 Plus delivers a constant 60,000 lbs thrust and pullback with reserves for up to 90,000 lbs.