# SYSBOHR Duplex Overburden Drilling System D 88.9–323.9 mm with Rotary Head

URL: https://knoedlseder.com/en/products/sysbohr-duplex-ueberlagerungsbohrsystem-d-889-3239-mm-mit-drehkopf  
Languages: [de](https://knoedlseder.com/de/products/sysbohr-duplex-ueberlagerungsbohrsystem-d-889-3239-mm-mit-drehkopf?format=md) · [en](https://knoedlseder.com/en/products/sysbohr-duplex-ueberlagerungsbohrsystem-d-889-3239-mm-mit-drehkopf?format=md) · [cz](https://knoedlseder.com/cz/products/sysbohr-duplex-ueberlagerungsbohrsystem-d-889-3239-mm-mit-drehkopf?format=md)

![Technische Darstellung: Sysbohr Duplex-Überlagerungsbohrsystem D 88,9–323,9 mm mit Drehkopf](https://knoedlseder.com/media-cache/uploads/2026/09/sysbohr-01-ueberlagerung-duplex-drehkopf.png)

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

Cased duplex drilling with a single rotary drive for casing and inner drill string. The inner string uses a rotary bit or DTH hammer to suit the formation. With an internal auger for spoil removal, casing and auger are advanced alternately.

| Technical data |
| --- |
| System diameter | 88.9–323.9 mm |
| Drive | Rotary head |
| Pipe/rod lengths | 500–6000 mm |
| Cuttings return | Annulus between outer casing and inner drill string |
| Threads | Right-/left-hand, tapered or parallel |

### Manufacturer Link

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

[Manufacturer Link](https://www.sysbohr.com/de/produkte/ueberlagerungsbohrsysteme/ueberlagerungsbohrsystem-duplex-mit-drehkopf/)

## Documents

- [SYSBOHR Überlagerungsbohrsystem Duplex D 88,9–323,9 mm mit Drehkopf – Datenblatt](https://knoedlseder.com/media-cache/uploads/2026/10/sysbohr-1207-datenblatt-7e8b6fdd6a47.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