Technical Reference
PRACTICAL TECHNICAL REFERENCE
Deep Hole
Drilling Guide
Method Selection · Cutting Parameters · Troubleshooting · Material Guides · Machine Selection3Core MethodsGundrilling · BTA · Ejector
>10:1L/D ThresholdDeep hole definition
0.5–2000mmDiameter RangeMicro to large bores
FEATURED GUIDES
Popular Guides
What Is Deep Hole DrillingWhat Is BTA DrillingWhat Is Ejector DrillingGundrill vs Deep Hole DrillingGundrill vs Twist DrillBTA vs EjectorMethod Selection WizardFeeds & Speeds TablesGundrill Speeds & FeedsCoolant System GuideMaterial Parameters ReferenceTolerances & QualityGundrill Sizes & DiametersHow Deep Can a Gundrill GoDeep Hole Drilling CostHow to Buy a MachineMachine PricesGundrilling ProcessBTA DrillingEjector DrillingTroubleshooting GuideMachining Center Deep HolesMicro Deep Hole DrillingSkive & Roller Burnishing
CORE PROCESSES
Core Processes
★ FeaturedMethod Selection WizardCompare & decide★ FeaturedGundrilling ProcessSingle-lip external chip★ FeaturedBTA Drilling ProcessSingle-tube internal chip★ FeaturedEjector DrillingDouble-tube DTSOther MethodsTrepan · Skive · Pull★ FeaturedFeeds & Speeds TablesVc · feed · depth factor★ FeaturedCoolant System GuidePressure · flow · filtrationTool Geometry & CoatingsDrill types · guides · coatings★ FeaturedTolerances & QualityIT grades · Ra · straightness★ FeaturedMaterial Parameters RefQuick-lookup tableChip Shape DiagnosisIdentify & adjust★ FeaturedTroubleshooting GuideSymptoms · causes · fixesCNC ProgrammingG73 · G83 · custom macroCutting FluidsOil · emulsion · syntheticToolholding & RunoutShrink · hydraulic · colletGuide BushingsTypes · setup · tolerancesIndustry Deep DivesBarrels · cylinders · moldsEDM DrillingSpark erosion · micro holesCase StudiesReal-world resultsFinishing OperationsHone · ream · burnishAerospace DrillingLanding gear · turbinesGun Barrel DrillingRifle bores · rifling★ FeaturedMicro Deep Hole DrillingSub-mm · high aspect ratioPilot Holes & StartingEntry · bushings · bell-mouthDrilling vs EDM/LaserCompare alternative methods★ FeaturedGundrill vs Twist DrillWhen to switch★ FeaturedHow Deep Can a Gundrill GoL/D limits★ FeaturedGundrill Speeds & FeedsParameters★ FeaturedBTA vs EjectorSTS vs DTSHydraulic CylindersBarrel drillingEV Motor ShaftsRotor shaft holesMedical ImplantsBone screws & instrumentsMold Cooling ChannelsWaterlines · P20 / H13 / SKD61Oil & Gas DownholeTool components · Inconel★ FeaturedWhat Is Deep Hole DrillingDefinition & fundamentals★ FeaturedGundrill vs Deep Hole DrillingTerminology clarified★ FeaturedSkive & Roller BurnishingOne-pass bore finishingDeep Hole HoningCrosshatch & final sizeGun ReamingDeep-hole reamersTrepanning Deep HolesSolid core recoveredBlind Hole DrillingDead-end boresDeep Hole TappingThreads at depthBroken Tool RecoverySave the partCrankshaft Oil HolesAngled galleriesFuel Injector HolesSub-mm nozzlesTurbine Shaft BoresMetre-long center boresValve Block DrillingCrossing galleriesTube Sheet DrillingHundreds of holesCamshaft Oil HolesLobe & gear feedConnecting Rod Oil HolesRod galleriesTransmission Shaft GalleriesMulti-spindle feedsTurbocharger Oil HolesBearing oil feedsPiston Cooling GalleriesDiesel oil galleriesDental Implant DrillingTitanium micro holesGeothermal DrillingGround-source bores★ FeaturedWhat Is BTA DrillingSingle-tube system★ FeaturedWhat Is Ejector DrillingDouble-tube systemDissimilar Stack DrillingCFRP / Al / Ti one-shot
MATERIAL-SPECIFIC GUIDES
Materials by Type
Carbon & Alloy SteelP-group materialsStainless SteelAustenitic · MartensiticAluminum AlloysHigh-speed parametersTitanium AlloysHeat managementSuperalloysInconel · HastelloyHardened SteelHRC 40+Cast IronGray · Ductile · CGINon‑Standard MaterialsExotic alloys · compositesCompositesCFRP · delamination controlCopper & BrassGummy-chip controlMagnesium AlloysFire-safe machiningTool SteelsH13 · D2 · SKD61Duplex Stainless2205 · 2507Cobalt-ChromeCoCr implants & turbinesZirconiumFire-safe machiningMonel AlloysNi-Cu marine gradeBeta TitaniumStrongest Ti alloys
EQUIPMENT & REFERENCE
Equipment & Reference
Machine Selection GuideSpecs · budget · brand comparison
SuppliersMachine & tool suppliers
Industry ApplicationsAerospace · Automotive · Mold & Die
GlossaryTechnical terminology
VDI Standards3208 · 3209 · 3210 · 3211
Industry ResourcesMagazines · forums · handbooks
SafetyCoolant · chip · tool breakage
Automation & CellsRobotics · lights-out · case studies
TSC SystemsRotary union · pump · design
Coolant FiltrationFilter types · chip conveyors
Machine MaintenanceDaily · weekly · annual
Process MonitoringIoT · OPC-UA · predictive
★ FeaturedMachining Center Deep HolesGundrill on VMC · TSC retrofit
BTA Pressure HeadsBOZA · seals · drill bushings
Drill Tubes & Boring BarsTube design · connections
Workholding & FixturesChucking · long-part support
Steady Rests & Whip GuidesSupport · vibration dampers
Gundrilling on a LatheTailstock · turret setups
★ FeaturedHow to Buy a Deep Hole Drilling MachineBuyer's guide · specs · price
Used Deep Hole Drilling MachinesBuying used · inspection · retrofit
★ FeaturedGundrill Sizes & Standard DiametersSize charts · length formula
DESIGN & ECONOMICS
Design & Economics
DFM GuideDesign for deep holesCost Per HoleAnalysis & comparisonQuality InspectionMeasurement & metrologyTool RegrindingReconditioningVibration SuppressionChatter controlStandards ReferenceVDI · ISO · NASA · ASMEQuality CertificationsAS9100 · ISO 13485 · NADCAPMake vs BuyOutsource · evaluate · decideContract Drilling ServicesHire a job shopSustainable DrillingGreen · cryogenic · MQLSPC & QualityCp · Cpk · control charts★ FeaturedMachine PricesCost ranges & quotesMarket & Industry OutlookSize · growth · trends★ FeaturedDeep Hole Drilling CostWhat it really costs
INTERACTIVE TOOLS
Calculators & Tools
Speed & Feed CalculatorRPM · feed · MRRCost Per Hole CalculatorMachine · tooling · scrapCoolant CalculatorPressure · flow · pumpMethod Selection WizardPick gundrill / BTA / ejectorCycle Time CalculatorRPM · feed · timePower & ThrustMachine sizingUnit Converterm/min · SFM · barCoolant Pressure DropLine loss estimateWhip Guide SpacingSupport calculatorL/D Ratio CalculatorDepth ratio · methodTool Life EstimatorSpeed & feed impact
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