Operator's Manual

g021765
Figure28
1.20cm(8inches)
Thisexibilityisoftenratedinmaterialsasa
minimumbendradius,whichistheradiusofthe
circleformedifthematerialorpipes,connected
together,werebenttoformagiantcircle.The
minimumradiusofacirclemadewiththepipe
usedwiththismachineis33m(108.2ft).
•Entrypitch
Theentrypitchistheangleatwhichthemachine
enterstheground.Withthetracksonlevelground,
thestabilizersdown,andthestake-downplate
ontheground,thedrillframeangleisabout15
degreesora27%pitch.Thispitchwillchange
dependingontheslopeofthegroundandother
factorsofthejobsite.Youcanalsoreducethis
pitchabitbybuildingupthegroundunderthe
stake-downplatebeforepositioningthemachine.
Youcandeterminetheactualpitchofthedrill
framebyplacingthedrillbitandsondehousing
ontheframeandthenusethereceivertodisplay
thepitch.
Thesteepertheentrypitchis,thedeeperthebore
willhavetobeduetothelimitationsofthepipe
exibility.Typicallyyouneedtoinsertthedrilland
atleast1/3ofapipeintothegroundbeforeyou
canstartsteeringtowardthebeginningofthebore
point.Figure29,Figure30,andthefollowingtable
illustratetherelationshipbetweenentrypitchand
depth.
g034677
Figure29
1.26%pitch3.76cm(30inches)
2.3m(10ft)
g034678
Figure30
1.18%pitch3.53cm(21inches)
2.3m(10ft)
43