Operator's Manual

Table Of Contents
g021765
Figure41
1.20cm(8inches)
Thisexibilityisoftenratedinmaterialsasa
minimumbendradius,whichistheradiusofthe
circleformedifthematerialorpipes,connected
together,werebenttoformagiantcircle.The
minimumradiusofacirclemadewiththepipe
usedwiththismachineis31m(101ft).
Entrypitch
Theentrypitchistheangleatwhichthedrillbit
enterstheground.Withthetracksonlevelground,
thestabilizersdown,andthestake-downplate
ontheground,thedrillframeangleisabout15
degreesora27%pitch.Thispitchwillchange
dependingontheslopeofthegroundandother
factorsofthejobsite.Youcanalsoreducethis
pitchabitbybuildingupthegroundunderthe
stake-downplatebeforepositioningthemachine.
Youcandeterminetheactualpitchofthedrill
framebyplacingthedrillbitandsondehousing
ontheframeandthenusethereceivertodisplay
thepitch.
Thesteeperyourentrypitchis,thedeeperyour
boremustbeduetothelimitationsofthepipe
exibility.Typically,youneedtoinsertthedrillbit
andatleast1/3ofapipeintothegroundbefore
youcanstartsteeringtowardthebeginningofthe
borepoint.Figure42,Figure43,andthefollowing
tableillustratetherelationshipbetweenentrypitch
anddepth.
g218953
Figure42
1.26%pitch3.76cm(30inches)
2.3m(10ft)
g218953
Figure43
1.18%pitch3.53cm(21inches)
2.3m(10ft)
40