# SYSBOHR Reverse Circulation Drilling System D 139.7-406 mm

URL: https://knoedlseder.com/en/products/sysbohr-reverse-circulation-bohrsystem-d-1397-406-mm  
Languages: [de](https://knoedlseder.com/de/products/sysbohr-reverse-circulation-bohrsystem-d-1397-406-mm?format=md) · [en](https://knoedlseder.com/en/products/sysbohr-reverse-circulation-bohrsystem-d-1397-406-mm?format=md) · [cz](https://knoedlseder.com/cz/products/sysbohr-reverse-circulation-bohrsystem-d-1397-406-mm?format=md)

![Technische Darstellung: Sysbohr Reverse-Circulation-Bohrsystem D 139,7–323,9 mm mit Gewindeverbindung](https://knoedlseder.com/media-cache/uploads/2026/09/sysbohr_16-1.png)

Category: [Tools and Accessories](https://knoedlseder.com/en/products/categories/werkzeuge-und-zubehoer?format=md)

RC system for exploration and specialist foundation drilling with dual-wall rods. Compressed air travels down the outer passage to the DTH hammer; cuttings return through the inner tube. Threaded and hexagonal connections are available, along with flushing heads and adapters for Kelly rigs.

| Technical data |
| --- |
| Threaded rods: diameter | 139.7–323.9 mm |
| Threaded rods: working length | 1500–6000 mm |
| Hexagonal rods: diameter | 193.7–406.4 mm |
| Hexagonal rods: working length | 1500–12000 mm |
| Flushing medium | Compressed air |
| Cuttings return | Through the inner pipe to the surface |

### Manufacturer Link

Detailed technical information can be found on the manufacturer’s product page.

[Manufacturer Link](https://www.sysbohr.com/de/produkte/reverse-circulation-bohrsystem/)

## Documents

- [SYSBOHR Reverse-Circulation-Bohrsystem mit Gewinde- und Sechskantverbindung – Datenblatt](https://knoedlseder.com/media-cache/uploads/2026/10/sysbohr-1262-datenblatt-2b2387b5f73a.pdf)

## Contact Person

- [Head of Internal Sales](https://knoedlseder.com/en/team_members/michael-kirchinger-2?format=md)  
  Head of Internal Sales Germany  
  Gotthard Knödlseder Hammerwerk GmbH  
  Email: km@knoedlseder.com  
  Phone: +49 85 86 96 78 11
- [Head of Internal Sales](https://knoedlseder.com/en/team_members/thomas-schmid?format=md)  
  Head of Internal Sales Austria  
  Gotthard Knödlseder Bohrtechnik GmbH  
  Email: ts@knoedlseder.com  
  Phone: +49 85 86 96 78 14