© 2018 Utilicor Technologies Inc.
minicor-3 V1.5
20
Utilicor Process, Pilot Bit and Integral Center Pilot Hole
The central pilot bit and related pilot hole, are unique to the Utilicor process,
and perform four important functions in Rotary Coring and Reinstatement
(1)
Accuracy:
The 2 3/8" PDC central pilot bit, which is integral to the
Utilicor coring process, acts as a concentric guide for the coring drum,
centering and stabilizing it to ensure a fast and accurate cut. It is the
same type of robust, high-performance bit that is used in the drilling
industry to quickly and accurately cut through rock and other tough
materials.
(2)
Access and Handling:
The central pilot hole, created by the pilot bit,
provides a convenient access for the core-puller by which the core or
coupon is removed from the pavement and by which it is repositioned
back into the pavement during reinstatement after completion of the
repair. Other coring processes which do not employ an integrated
central pilot bit must either drill a separate bar hole in the core, insert a
separate lifting ring into the core or use some form of clamping
mechanism or other device to lift the core out of the hole after cutting
and to accurately refit the core back into the hole after the repair. This
involves an extra step and adds more complexity to the coring process.
(3)
Coring Guidance:
Because the pilot bit cuts slightly deeper than the
coring drum, it can provide the coring operator with an audible and
sensory cue as to when the coring drum is about to core through the
bottom of the pavement. When the pilot bit breaks through the
pavement into the sub-grade there usually is a noticeable change in
the sound and the feel of the coring process, which can alert the
operator to the fact that the coring drum is about to cut through the full
pavement depth.
(4)
Reinstatement:
The pilot hole allows you to easily manipulate the core
using a core puller (CP-Puller)
.
The pilot hole allows allows for the
easy egress of Utilibond when leveling the core.
