Churn drill
id:
churn-drill-166-16109643
title:
Churn drill
text:
The churn drill is a large drilling machine that bores large diameter holes in the ground. In mining, they were used to drill into the soft carbonate rocks of lead and zinc hosted regions to extract bulk samples of the ore. Churn drills are also called percussion drills, as they function by lifting and dropping a heavy chisel-like bit which breaks the rock as it falls. Churn drills are most effective in soft- to medium-density rock of relative shallow depth.
brand slug:
wiki
category slug:
encyclopedia
description:
Ground boring machine
original url:
https://en.wikipedia.org/wiki/Churn_drill
date created:
2005-04-12T01:27:45Z
date modified:
2024-08-30T02:35:49Z
main entity:
{"identifier":"Q5118305","url":"https://www.wikidata.org/entity/Q5118305"}
image:
fields total:
13
integrity:
15