The difference between a good drilling parameter and a bad one can be 50% in tool life or hole quality. Cutting data reference tools — whether mobile apps, web-based calculators, or desktop software — bring decades of machining data to the operator's fingertips. They replace dog-eared printed charts, handwritten notes, and guesswork with structured, searchable, and calculable reference data. For deep hole drilling, where parameters vary significantly by material, hole geometry, and machine type, a good reference tool is essential.
Type Comparison
| Tool Type | Platform | Cost | Content Depth | Best For |
|---|
| Tool manufacturer app | iOS/Android | Free (with registration) | Limited to their tooling | Quick lookup for specific tools |
| General machining calculator | iOS/Android/Web | Free to $10 | General — broad material range | Speed/feed calculation — unit conversion |
| Material-specific app | iOS/Android | Free to $5 | Deep — one material family | Specialized materials (titanium, Inconel) |
| Web-based reference database | Web browser | Free to subscription | Comprehensive — multi-source | Parameter research — comparison |
| Desktop cutting data software | Windows/Mac | $100–500 | Very comprehensive | Programming — documentation — team use |
| Digital handbook (e-book) | Any e-reader | $20–100 | Comprehensive — static | Reference reading — training |
| Tool | Type | Key Features | DHD Specific | Cost |
|---|
| Sandvik Coromant CoroPlus | Tool manufacturer app | Speed/feed calculator — tool selection | Limited (general drilling) | Free |
| Kennametal NOVO | Tool manufacturer platform | Tool recommendation — parameter calculation | Covers deep hole drilling tools | Free |
| Seco SecoPoint | Tool manufacturer app | Parameter calculator — tool selection | Limited | Free |
| FANUC CNC Guide | CNC simulation | Parameter verification — program test | Not parameter reference | Subscription |
| Walter Walter GPS | Web platform | Tool selection — parameter optimization | Covers deep hole drilling | Free (registration) |
| Iscar IscarMate | Mobile app | Tool recommendation — parameters | Limited | Free |
| Machinery's Handbook (digital) | Digital reference | Comprehensive machining data | General — covers drilling | $80 |
Key Features
Essential Features
| Feature | Description | Why Important for DHD |
|---|
| Material database | List of materials with hardness ranges — machinability ratings | DHD materials vary widely — from low-carbon steel to Inconel |
| Speed and feed calculation | Calculate cutting speed and feed rate from material and tool data | Core parameter selection |
| Tool geometry database | Recommended point angles — flute geometry — coatings | DHD tool geometry is specialized |
| Coolant pressure recommendation | Optimal pressure and flow rate for the operation | Critical for deep hole drilling — chip evacuation |
| Tool life estimation | Expected tool life at given parameters | Production planning — cost estimation |
| Unit conversion | Metric/imperial — speed units — pressure units | International standards — mixed equipment |
| Power and torque calculation | Required spindle power and cutting torque | Machine capability verification |
| Hole tolerance estimation | Expected diameter tolerance — surface finish | Quality planning |
Deep Hole Drilling Specific Features
| Feature | What It Does | Why It Matters |
|---|
| Depth-to-diameter ratio input | Adjusts parameters for depth ratio | Shorter tools can run faster — deeper holes need reduced parameters |
| Guide bushing parameters | Recommends bushing clearance | Proper bushing fit is critical for hole straightness |
| Coolant type and pressure | Suggests optimal pressure for material and depth | Insufficient pressure causes chip packing and drill failure |
| Entry and exit parameters | Recommends reduced feed at entry and exit | Prevents drill wander and exit burr |
| Through-coolant vs external | Adjusts for coolant delivery method | Gun drilling and BTA have different coolant requirements |
| Material hardness input | Adjusts parameters based on actual hardness | 50 HB difference changes optimal speed by 15–20% |
Selection Criteria
Evaluation Factors
| Factor | Why It Matters | What to Look For |
|---|
| Material coverage | Must cover materials you drill | Include alloy steels — stainless — titanium — nickel alloys |
| DHD-specific data | General drilling data does not apply | Separate gun drilling and BTA parameters |
| Calculation method | Transparent methodology | Shows formulas or references — not a black box |
| Update frequency | Cutting data evolves | Regular updates — active development |
| Offline availability | Shop floor may not have internet | Offline mode or downloadable data |
| Input flexibility | Accept actual parameters | Hardness — tool geometry — machine power |
| Output detail | Useful parameter set | Speed — feed — pressure — power — torque — tool life |
| Ease of use | Quick to use on the shop floor | Clear input — unambiguous output |
Questions to Ask
| Question | What It Reveals |
|---|
| Does it include deep hole drilling specific parameters? | Relevance to your application |
| Can I input material hardness? | Result accuracy |
| Does it calculate coolant pressure requirements? | Utility for DHD |
| Can I save and share parameter sets? | Team usability |
| Is it based on published cutting data or user-contributed? | Data reliability |
| Does it include tool life data? | Production planning value |
Using Apps Effectively
| Input Parameter | How to Get Accurate Values | Common Mistake |
|---|
| Material | Use actual material specification — not generic name | Selecting "Steel" instead of "4140 Annealed 200 HB" |
| Hardness | Measure or obtain from material cert — do not guess | Using estimated hardness off by 50 HB |
| Tool diameter | Measure actual drill diameter | Using nominal diameter for worn drill |
| Hole depth | Actual hole depth | Using total part length instead of drilling depth |
| Machine power | Include drive efficiency — not just motor rating | Using spindle motor rating without transmission loss |
| Coolant pressure | Actual pressure at the drill — not pump discharge | Using pump pressure without line losses |
Understanding Assumptions
| Assumption | Effect on Calculated Parameters | Check |
|---|
| Tool is new | Calculated parameters assume sharp tool | Reduce 10–15% for reground tools |
| Coolant is at correct concentration | Assumes optimal lubrication | Reduce speed 10% if concentration is low |
| Machine is rigid | Assumes stable setup | Reduce parameters for thin-wall parts or long overhangs |
| Material is homogeneous | Assumes uniform hardness | Adjust for surface hardness or heat-treated materials |
| Tool is correctly aligned | Assumes < 0.01 mm TIR | Reduce feed 20% if runout is high |
Verification Cycle
| Step | Action | Detail |
|---|
| 1 | Calculate starting parameters using app | Use accurate inputs |
| 2 | Run first part at calculated parameters | At nominal values |
| 3 | Inspect hole quality | Diameter — surface finish — straightness |
| 4 | Check tool condition after first hole | Edge condition — wear pattern |
| 5 | Adjust parameters based on results | Increase or decrease as indicated |
| 6 | Run 10 parts at adjusted parameters | Verify consistency |
| 7 | Establish standard parameter set | Document for future reference |
| 8 | Compare actual tool life to app estimate | Calibrate app assumptions to your conditions |
FAQ
What is the best cutting data app for deep hole drilling?
The best cutting data apps for deep hole drilling are tool manufacturer platforms that include deep hole drilling specific data: Kennametal NOVO (covers deep hole drilling tools — provides parameter recommendations for gun drilling and BTA), Sandvik Coromant CoroPlus (excellent general drilling data — includes some deep hole drilling content), and Walter GPS (comprehensive material database with parameter calculation for various drilling methods). For general machining calculation, any app with a complete material database and speed/feed calculator works — but verify that the data is appropriate for deep hole drilling depths (standard drilling data assumes depth-to-diameter ratios of 3:1–5:1, while DHD ratios can exceed 50:1).
How accurate are cutting data mobile apps?
Cutting data mobile apps provide starting parameters that are generally within 10–20% of optimal for the specified material and operation. The accuracy depends on: input accuracy (actual material hardness, tool condition, machine rigidity — the app can only calculate based on what you enter), the app's data source (tool manufacturer data is based on their specific tool geometries — it may not apply to other brands), and your specific conditions (coolant type, machine condition, setup rigidity — no app accounts for all variables). Use app results as a starting point, verify with actual parts, and adjust based on results. The app replaces the handbook lookup — it does not replace process optimization.
What cutting data is most important for deep hole drilling?
The most important cutting data for deep hole drilling is: cutting speed (m/min or SFM) — determines tool life and surface finish; feed rate (mm/rev) — determines chip thickness and material removal rate; coolant pressure (bar or psi) — determines chip evacuation effectiveness — most critical parameter that distinguishes DHD from conventional drilling; coolant flow rate (L/min) — determines cooling and chip transport; and tool geometry parameters (point angle, web thickness, margin width) — must match the material and application. Unlike conventional drilling, coolant pressure is often the limiting parameter in DHD — if the app does not calculate coolant pressure requirements, it is not adequate for deep hole drilling.
Can cutting data apps replace experience?
Cutting data apps cannot replace experience — they replace handbook tables and provide starting points, but they cannot account for the specific conditions of your machine, setup, and tooling. An experienced operator adjusts parameters based on chip color, spindle sound, surface finish appearance, and tool wear patterns — factors no app can measure. The effective use of cutting data apps is: app provides the starting parameters → operator runs the first part → operator observes results → operator adjusts based on experience → parameters are documented for future reference. The combination of data-driven starting points and experience-driven optimization produces the best results.
Do I need different cutting data for gun drilling vs BTA drilling?
Yes — gun drilling and BTA drilling require fundamentally different cutting data. Gun drilling uses higher cutting speeds (60–120 m/min for steel) with lower feed rates (0.01–0.06 mm/rev) and lower coolant pressure (20–80 bar). BTA drilling uses lower cutting speeds (40–100 m/min for steel) with higher feed rates (0.05–0.20 mm/rev) and higher coolant pressure (30–150 bar). The tool geometry also differs — gun drills have a single cutting edge with a coolant hole, while BTA heads have multiple cutters with coolant passages. A cutting data app that does not distinguish between these methods is not adequate for deep hole drilling reference.
Cutting data mobile apps and digital reference tools put machining knowledge at the operator's fingertips. Select tools that include deep hole drilling specific data — coolant pressure calculation, depth-to-diameter ratio adjustment, and material-specific parameters for gun drilling and BTA. Use app results as starting points, verify with actual parts, and combine digital data with operator experience for optimal parameters. The best reference tool is the one that is actually used on the shop floor — prioritize ease of use and quick access. This article reflects industry practice as of 2026.
