CB-2

Overview

The BUG-O CB-2 is an oxy-fuel circle burner designed for square and beveled hole cutting on vessels and large-diameter pipe. It is built for industrial applications where accurate circular openings, controlled torch movement and repeatable cutting geometry are required.

The CB-2 is mounted on a special frame with a releasable permanent magnet base, allowing the machine to be positioned directly on ferrous vessels and large-diameter pipe. This makes it a practical solution for field fabrication, vessel work, maintenance operations and production environments where the workpiece is too large or inconvenient to move to a fixed cutting station.

The machine includes variable speed rotation, a 2-hose oxy-fuel machine torch, adjustable tip adaptor, vertical and horizontal torch adjustment, and a rise and fall cam. It is capable of cutting beveled holes from 1.5″ to 42″ / 38 to 1067 mm and square-cut holes from 4″ to 48″ / 102 to 1219 mm.

Recommended options and accessories

1. CWO-6210 Rotation Control Box: Controls rotation speed, travel direction, on/off operation and machine power indication.
2. CWO-6100-K Rotation Control: Rotation control assembly used with the CB-2 circle burner.
3. BUG-1298 2-Hose Machine Torch: Oxy-fuel machine torch supplied with the CB-2 for cutting operation.
4. BUG-1259 Adjustable Tip Adaptor: Allows torch tip adjustment for correct cutting setup and torch alignment.
5. BUG-1252-2 Acetylene Tips: Cutting tips referenced in the CB-2 parts list.
6. CWO-1635 Racking System: Provides vertical torch positioning adjustment during setup and cutting.
7. CWO-1690 Large Horizontal Racker: Provides horizontal torch adjustment for accurate positioning relative to the cut line.
8. CWO-3205 Cam Assembly: Rise and fall cam assembly used to follow the contour of vessels and large-diameter pipe.
9. Oxy-fuel hose connections: The machine accepts standard oxy-fuel hose fitting connections at the top of the shaft.
10. Special frame with releasable permanent magnet base: Integrated CB-2 mounting method for secure positioning on ferrous vessels and large-diameter pipe.

Key points

• Oxy-fuel circle burner for square and beveled hole cutting.
• Designed for vessels and large-diameter pipe.
• Mounted on a special frame with a releasable permanent magnet base.
• Manually operated magnet mounting system.
• Beveled hole capacity from 1.5″ to 42″ / 38 to 1067 mm.
• Square-cut hole capacity from 4″ to 48″ / 102 to 1219 mm.
• Rise and fall cam range from 0″ to 7″ / 0 to 178 mm.
• Rotation speed range from 0.1 to 2 rpm.
• Variable speed rotation for process control.
• 2-hose oxy-fuel machine torch with adjustable tip adaptor.
• Vertical and horizontal torch adjustment.
• Single-pass square or beveled hole cutting.
• Brushes and collector rings eliminate cable and hose wrap-up.
• 120 VAC and 240 VAC versions available.
• Made in USA.

Technical advantages

The main technical advantage of the BUG-O CB-2 is its ability to bring controlled oxy-fuel circle cutting directly to large ferrous workpieces. The special frame and releasable permanent magnet base allow the machine to be mounted directly on vessels and large-diameter pipe, avoiding the need to move the workpiece to a fixed cutting system.

The rise and fall cam is central to the CB-2’s performance. It raises and lowers the torch during rotation, helping the torch follow the geometry of the vessel or pipe and supporting accurate square or beveled hole cutting in a single pass.

The variable speed rotation system allows the operator to control travel speed according to material, hole size, torch setup and cutting conditions. The CWO-6210 control box provides speed control, travel direction, brake position, on/off control and pilot light indication.

The machine also includes adjustable vertical and horizontal torch positioning. This allows the operator to align the torch correctly before cutting, set the required standoff distance and angle, and improve cut consistency.

Another important operational benefit is the elimination of hose and cable wrap-up. Brushes and collector rings allow the machine to rotate while maintaining control and gas connections, supporting cleaner workflow and reducing interruption during circular cutting.

Applications

The BUG-O CB-2 is designed for oxy-fuel cutting on vessels and large-diameter pipe. It is suitable for producing square holes, beveled holes and circular openings where controlled, repeatable cutting is required.

Typical applications include pressure vessel fabrication, tank work, large pipe fabrication, industrial maintenance, heavy repair work, fabrication workshops, field cutting operations and applications where magnetic mounting directly to the workpiece is required.

The CB-2 is particularly useful when the workpiece is large, heavy or difficult to handle. Instead of moving the material to a fixed machine, the CB-2 can be mounted directly on the work surface using its manually operated permanent magnet base.

Why choose this product

The CB-2 is a strong choice for companies that need repeatable oxy-fuel circle cutting on large ferrous workpieces. Its magnetic mounting system, controlled rotation, torch adjustment and rise and fall cam make it more accurate and consistent than freehand cutting for large pipe and vessel openings.

For fabrication teams, the practical value is reduced manual variability, improved hole geometry, better control over bevel cutting and faster repeatable setup. The machine is purpose-built for square and beveled hole cuts in vessels and large-diameter pipe, making it a focused production tool rather than a generic cutting accessory.

For maintenance and field teams, the advantage is mobility. The CB-2 can be brought to the workpiece and mounted directly on the surface, which is strategically useful when dealing with large industrial components that cannot easily be repositioned.