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WINKIE DRILL ASSEMBLY PARTS MANUAL
using less circulating water, has proven to be the first in various fields to get a larger percentage of core
recovery, drilling smaller diameter holes than the conventional drill.
For instance, on one drilling project using conventional Diamond Drills, the core recovery in the coal seam
was practically nil using double tube core barrels. The Winkie Drill was used on the same project with a
single tube core barrel. It recovered 29 ¾” of coal cores from a 32” seam.
The standard Diamond Bit sizes used are the following:
**IEW - 5 (1.5” hole – 1” core)
**AW - 34 (1.89” hole – 1.32” core
The mining series Thin Wall Diamond Bit allows faster penetration and uses less water to carry up the
cuttings. The automatic safety clutch on the Winkie Drill permits the use of thin wall bits to be run with a
minimum supply of water without the worry of burning an expensive Diamond Bit.
TECHNICAL INFORMATION
DRILLING PROCEDURE
First of all, drill must be securely anchored.
Starting the Drill Hole
Starting on Rock Surfaces:
A. Use a short core barrel ranging between 1-1/2” to 2’ often termed the starting barrel. This barrel is a single
or double tube barrel. Drill the starting barrel at least 4” to 6” into the rock.
B. If using a whole stone straight wall bit (a bit without a core spring), dry block. Dry blocking with
impregnated bit will significantly reduce bit life.
1.
Shut off the water supply and
2.
Run the drill at half throttle, at the same time applying pressure to bit.
The machine will automatically stop when the bit has dry blocked (wedged the core in the face of the bit
with rock dust). With a core spring, the bit may be drawn off the bottom and the core will remain in the
barrel in the event the core may be left in the hole, a core fisher with springs is attached to the core barrel
to fish the lost core. Do not rotate the core fisher.
Summary of Contents for GW-15
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