30-Second Summary: VDI (Association of German Engineers) has published four core standards for deep hole drilling — 3208 (Gundrilling), 3209 (BTA/external coolant supply), 3210 (Overview), and 3211 (Machining Centers). The most recent update is VDI 3209 Blatt 1:2024-01, which was revised in January 2024. Mastering these standards is key to a systematic understanding of deep hole technology.
Four Core Standards
| Standard No. | Latest Revision | Title | Core Content |
|---|---|---|---|
| VDI 3208 | 2014-04 | Deep hole boring with gun drills | Gundrill definition, technical requirements, cutting data recommendations (material-specific Vc and feed tables), tool design parameters, coolant flow rate and pressure charts |
| VDI 3209 Blatt 1 | 2024-01 (most recent) | Deep hole boring systems with external supply of coolant | Asymmetric BTA tool design, process parameters, equipment requirements. Updated cutting data for modern tool materials and coatings. |
| VDI 3209 Blatt 2 | 2019-01 | Approximate values for skiving and roller burnishing of bores | Skiving and roller burnishing parameters, surface finish predictions, tool selection guidelines for finishing operations |
| VDI 3210 Blatt 1 | 2006-03 | Deep-hole boring — Overview | Deep hole drilling overview, terminology, method classification, basic requirements, space requirements for different machine types |
| VDI 3210 Blatt 2 | 1986-10 | Deep-boring equipment — Form for enquiry, quoting and ordering | Standardized form for specifying deep hole drilling equipment during procurement — still useful for RFQ documentation |
| VDI 3211 | 2015-01 | Deep hole drilling on machining centers | Guidelines for deep hole drilling on machining centers, programming cycles (G73, G83), auxiliary equipment requirements, tool design for non-dedicated machines |
Key Technical Data in the Standards
The VDI standards provide extensive immediately usable technical data:
- Recommended cutting speeds (Vc) and feed (f) tables for different material groups — directly applicable to process planning
- Coolant flow rate vs. bore diameter charts for both gun drilling and BTA systems
- Coolant pressure vs. bore diameter charts accounting for L/D ratio
- Spindle drive power requirement calculation methods — net power, torque, and feed force tables by diameter and material
- Unified specifications for symbols, abbreviations, and terminology
- Tool geometry standards: clearance angles, land widths, chip breaker dimensions
- Quality assessment criteria for deep drilled bores (straightness, surface finish, tolerance)
Additional Relevant Standards
| Standard | Scope |
|---|---|
| ISO 286 / DIN 7154 | ISO tolerance system for holes — used to specify deep hole tolerances |
| DIN 1835 / DIN 6535 | Shank dimensions for drills with parallel and Morse taper shanks |
| ISO 513 | Classification of cutting tool materials (P/M/K/N/S/H groups) |
💡 How to obtain: VDI standards can be purchased online at www.vdi.de, available in German and English. Some standard content can be found referenced and summarized in manufacturer technical handbooks (such as the ISCAR Drilling Handbook, which features extensive excerpts from VDI 3208 and 3209 cutting data). DIN Media (dinmedia.de) also distributes VDI standards.
⚠️ Note: VDI 3210 Blatt 1 (2006) and Blatt 2 (1986) have not been recently updated. While they still provide valid foundational definitions, the cutting data and equipment specifications in VDI 3208 (2014), 3209 (2024), and 3211 (2015) should be given priority for current process planning.