30-Second Summary: When selecting suppliers, look beyond product specifications to technical support capability. Deep hole drilling relies heavily on process experience — a supplier with applications engineers is far more valuable than a cheap single-product vendor. The global deep hole drilling market was valued at approximately $225-228 million in 2024, with the top five manufacturers (TBT, Mollart, Kays, Entrust, TechniDrill) accounting for ~45% of the market. Asia Pacific leads with ~40% market share.
Machine Manufacturers
| Company | Country | Specialty | Typical Bore Size | Characteristics |
|---|
| UNISIG | USA | High-end BTA machines, multi-spindle cells | 25-300 mm | One of the deep hole technology leaders, strong in automation |
| TBT (Tiefbohrtechnik) | Germany | Full-range deep hole machines | 1-500+ mm | Global market leader, comprehensive process expertise |
| Mollart Engineering | UK | Custom deep hole machines, turnkey cells | Various sizes | Exclusive UK partner of Botek, strong in defense/automotive |
| Precihole | India | Gundrill/BTA machines | 1-250 mm | Good value, depth up to 10m, strong mid-range option |
| Kays Engineering | UK | Custom deep hole drills | Various sizes | Custom solutions for non-standard parts, top-5 global market share |
| Entrust / TechniDrill | Global | Specialized deep hole machines | Various sizes | Among top-5 global manufacturers |
| Sunnen | USA | Skive & burnish/honing | Various sizes | Authority in finishing and bore sizing |
| Galbiati Group | Italy | Deep hole drilling machines | Various sizes | European specialist with automation focus |
| Dezhou Guanlu / Jutai | China | Economical deep hole drills | Various sizes | Domestic cost-effective choice, strong in Asian market |
| Honge Precision | China | Deep hole drilling machines | Various sizes | Growing regional supplier |
Tool Brands
| Company | Country | Core Products | Key Technology |
|---|
| Botek | Germany | Gundrills, BTA drill heads, ejector drills, trepanning heads | Full-line deep hole tooling, Ø0.5-500mm. Solely focused on deep hole drilling tools. |
| Allied Machine | USA | GEN3SYS XT deep hole drills | SS/nickel-based alloy specific geometry, indexable BTA systems |
| Sandvik Coromant | Sweden | CoroDrill 860, deep hole drills for machining centers | Machining center deep hole solutions, Coromant Capto interface |
| Iscar | Israel | TRI-DEEP indexable drills, SUMOCHAM | Indexable insert deep hole drills, extensive reference data in Drilling Handbook |
| Gühring | Germany | Solid carbide drills, micro-drills | Small diameter deep hole expertise (<5 mm), high-performance coatings |
| Walter | Germany | Titex X-treme, DC170 Supreme | General high-performance drills, deep hole variants for machining centers |
| Mapal | Germany | Custom gundrills, reamers, BTA tools | High-precision custom solutions, often for automotive engine components |
Supplier Websites
| Company | Website |
|---|
| UNISIG | unisig.com |
| TBT Tiefbohrtechnik | tbt-tiefbohrtechnik.de |
| Mollart Engineering | mollart.com |
| Precihole | precihole.com |
| Kays Engineering | kaysengineering.co.uk |
| Sunnen | sunnen.com |
| Dezhou Guanlu | guanlucn.com |
| Botek | botek.de |
| Allied Machine | alliedmachine.com |
| Sandvik Coromant | sandvik.coromant.com |
| Iscar | iscar.com |
| Gühring | guehring.com |
| Walter | walter-tools.com |
| Mapal | mapal.com |
Supplier Evaluation Criteria
- Technical capability: Can they provide a complete process solution, not just sell equipment — including cutting data optimization, troubleshooting, and training
- Application engineering: Do they have process engineers to support trial cuts and troubleshooting onsite? This is the single most important differentiator between suppliers.
- Delivery and after-sales: Spare parts availability (especially for tooling — regrinding turnaround time matters), response time, training services
- Industry references: Successful applications in the same industry and similar part geometry. Ask for specific case studies, not general testimonials.