16 articles
Methods and standards for inspecting deep hole drilling bore quality. Diameter measurement, straightness, roundness, surface finish, and cylindricity. Practical acceptance criteria by application and industry.
A complete guide to chip formation and evacuation in deep hole drilling. Chip shapes, breaking mechanisms, coolant parameters, troubleshooting, and material-specific strategies for reliable chip control.
Select the right coolant system for deep hole drilling. Pump type comparison (screw vs centrifugal vs piston), filtration micron ratings, centralized vs standalone systems, chiller sizing, and total cost considerations.
Compare neat oil and water-miscible emulsion for deep hole drilling coolant. Lubrication performance, cooling capability, EP additives, maintenance requirements, and selection criteria by material and method.
A comprehensive preventive maintenance checklist for deep hole drilling machines. Daily, weekly, monthly, quarterly, and annual tasks covering coolant system, spindle, guideways, hydraulics, and electrical systems.
Select the right tool coating for deep hole drilling. TiN, TiCN, TiAlN, AlTiN, and AlCrN compared by hardness, temperature tolerance, friction, and material compatibility with application-specific recommendations.
Why coolant is more critical in deep hole drilling than conventional machining. The three functions — cooling, lubrication, chip transport — and why low-pressure systems fail at depth.
How to calculate coolant pressure and flow rate for deep hole drilling. Formulas for gun drilling and BTA systems, pump sizing guidelines, filtration requirements, and diameter-based reference charts.
Essential formulas for deep hole drilling — cutting speed, spindle speed, feed rate, material removal rate, power, torque, machining time, coolant pressure drop, and tooling cost per edge. With worked examples.
Deep hole drilling parameters for tool steels — P20, H13, A2, D2, and S7. Cutting speeds, feed rates, tool coating recommendations, and material-specific considerations for gun drilling and BTA.
A technical comparison of deep hole drilling and conventional twist drilling across 10 dimensions: tool design, chip evacuation, coolant delivery, precision, surface finish, straightness, productivity, cost, and decision thresholds with data.
A comprehensive technical guide to the four primary deep hole drilling methods — gun drilling, BTA (single-tube), ejector (double-tube), and trepanning. Detailed process mechanics, specifications, applications, and a selection decision matrix with cost data.
Proven parameters and practices for deep hole drilling Inconel 718, Inconel 625, and Hastelloy X. Cutting speeds, feeds, coolant pressure requirements, tool coatings, and real case study data from aerospace manufacturing.
A comprehensive introduction to deep hole drilling: definition, how it differs from conventional drilling, the three main methods (gun drilling, BTA, ejector), key components, achievable tolerances, and industry applications with technical data.
Complete guide to depth-to-diameter (L/D) ratio in deep hole drilling. Maximum achievable ratios by method, correction factors for speeds and feeds, and practical selection criteria.
Proven parameters for deep hole drilling titanium Ti-6Al-4V. Cutting speeds, feeds, coolant pressure, tooling selection, and practical tips from manufacturer data and shop-floor experience.