Toro 4045 - Entry Pitch Calculation

1
g021765
Figure52
1.20cm(8inches)
Thisexibilityisoftenratedinmaterialsasaminimum
bendradius,whichistheradiusofthecircleformedifthe
materialorpipes,connectedtogether,werebenttoform
agiantcircle.Theminimumradiusofacirclemadewith
thepipeusedwiththismachineis36.6m(102ft).
•Entrypitch
Theentrypitchistheangleatwhichthemachine
enterstheground.Withthetracksonlevelground,the
stabilizersdown,andthestake-downplateontheground,
thedrillframeangleisabout15degreesora27%pitch.
Thispitchwillchangedependingontheslopeofthe
groundandotherfactorsofthejobsite.Youcanalso
reducethispitchabitbybuildingupthegroundunder
thestake-downplatebeforepositioningthemachine.
Youcandeterminetheactualpitchofthedrillframeby
placingthedrillbitandsondehousingontheframeand
thenusethereceivertodisplaythepitch.
Thesteepertheentrypitchis,thedeepertheborewill
havetobeduetothelimitationsofthepipeexibility.
Typicallyyouneedtoinsertthedrillandatleast1/3ofa
pipeintothegroundbeforeyoucanstartsteeringtoward
thebeginningoftheborepoint.Figure53,Figure54,
andthefollowingtableillustratetherelationshipbetween
entrypitchanddepth.
1
2
3
g021766
Figure53
1.26%pitch3.76cm(30inches)
2.3m(10ft)
2
3
g021767
1
Figure54
1.18%pitch3.53cm(21inches)
2.3m(10ft)
52