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KOKEN
RPD（arrow drill） equipped with a hydraulic driven percussion unit
developed using KOKEN original know−how are capable of very rapid
drilling under any angles from horizontal to vertical．The RPD arrow
drills with the newly incorporated hydraulic operated percussion function
added to the conventional rotational and feeding functions are capable
of drilling holes through rocks and hard formations such as conglomerates
and boulders.
With its wide selection of RPD arrow drills ranging from one of the
largest ones in the world, the RPD-200, to the small and compact RPD-20，KOKEN
is able to supply contractors with the machine that is best adapted
to their drilling work. |
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| KOKEN water well drilling
rigs are in use today in many countries developing groundwater resources
to satisfy people's need for clean water. |
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| BIG MAN,
the first raise drill developed in Japan, has accomplished full mechanization
of raise drilling. With its unique mechanisms and dynamic performance,BIG
MAN has a wide range of applications such as well drilling，
ventilation shaft drilling and large diameter foundation piling hole
drilling for buildings and landslide prevention. BIG MAN
is capable of easy drilling at any type of geological formation |
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Speed
SPA Drill has many functions and was developed for various
needs or demands .Derrickless long feed method can drill to a maximum
of 9 m (SSD-3000) depth per one rod each. As this machine does not
need any derrick, it saves time, cost less and is also safe to work
with.
The machinery is adaptable for drilling with down the hole hammer,
three cone bits and also various type of tools. It is suitable for
accurate and fast drilling in all type of hard geological condition
including boulder and pebble.
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KOKEN Spindle type
boring machines (Core drills) have been designed and manufactured
based on our many years field experience．These drilling machines are
compact in shape and strongly built，they are reliable in every field
condition soft to hard formation strata，for small to large diameter，on
or offshore，etc．
They are now being operated in many places in the world with excellent
results. |
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