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The optimal preparation of a weld seam means a high-quality weld. That's why we developed the Graebener® circular beveling and root milling machine. Leveraging our globally leading market experience, you can prepare weld seams with milling depths of up to 120 mm more profitably, faster, and healthier than ever before.

Overview

Until the 1990s, we operated our own Graebener® pipe mill and prepared the weld seams of our pipes with boring and manual processes. Then we developed the Graebener® beveling and root removal machine and today more than 100 customers on four continents benefit from our market-leading machine technology.

The Graebener® circular beveling and root pass milling machine ensures cost-effective, reliable, and safe preparation of circular seams on pipes, ships, and vessels. For this reason, our beveling and root pass milling machines have been among the most popular machines for milling extremely narrow weld seams for years. According to actual usability studies, our machines offer a cost advantage of over 50 percent.

Your Graebener® machine will save you time and money, as the circular weld seam preparation and root removal machine is also ideally suited for fast and reliable processing. Benefit from our individual concepts and the numerous advantages we offer compared to conventional grooving or grinding methods.

Machine Concepts

Graebener® circular beveling and root cutting machines can be supplied with two different designs that best suit your requirements: a portable system that can be easily transported to the machine tool by crane or forklift, or a rail system. We offer the optimal solution for cost-effective beveling for different capacity classes. As a special machine manufacturer, we also develop customized machine designs upon request.
Graebener® Circular Weld Joint Preparation and Root Pass Machine, Type GRF 30

• Power: 30 kW
• Milling depth: up to 60 mm
• Outer pipe diameter: From 31″ (800 mm)
• Transportation options: crane, forklift

Graebener® Circular Weld Back Gouger and Root Removal Machine, Type GRF 45

• Power: 45 kW
• Milling depth: up to 100 mm
• Outer pipe diameter: From 31″ (800 mm)
• Transportation options: crane, forklift

Graebener® Circular Fusion Spool Welder and Root Pass Removal Machine, Type GRF 55

• Power: 55 kW
• Milling depth: up to 150 mm
• Outer pipe diameter: From 31″ (800 mm)
• Transportation options: crane, forklift

Graebener® Circular Groove Welding Back Gouging Machine, Type GRF 45-V

• Power: 45 kW
• Milling depth: up to 100 mm
• Outer pipe diameter: From 31″ (800 mm)
• Transportation options: rail system

Graebener® Circular Welding Joint Preparation and Root Pass Removal Machine, Type GRF 55-H

• Power: 55 kW
• Milling depth: up to 150 mm
• Outer pipe diameter: From 31″ (800 mm)
• Transportation options: rail system

Graebener® Circular Weld Joint Preparation and Root Removal Machine, Type GRF-S

• Custom Design Upon Customer Request

All Graebener® circular beveling and root removal machines are equipped with an intelligent sensor system to compensate for any unevenness or inclination. This ensures your Graebener® machine always provides a consistent seam depth.

Leverage the technical advantages of your Graebener® circular beveling and root trimming machine:

• Milling speed up to 600 mm/min
• Seamless stitch tracking on the control screen thanks to the integrated camera and laser
• Compensates for ±35 mm of lateral workpiece drift
• Low-cost milling inserts with multiple cutting edges

Milling and Grooving

Compared to standard processes like grooving or grinding with carbon electrodes, Graebener® The milling method offers you numerous advantages:

• Improved gutter quality
• Improved working conditions
• Recyclable chips
• Reduction in processing time
• Prerequisite for automatic welding process
• Reduction in welding defects
• The internal source root is visually controllable
• Source sediment and thus a reduction in heat input
• Decrease in energy demand

As proven by real-world studies with our customers, you as a machine operator can also save time and money. Furthermore, you can protect the health of your machine operators and significantly increase seam preparation quality – you will eliminate the need for manual reworking.