Rothenberger ROLOCK Power Torque Expander Head 42mm

Precision-machined from hardened special steel, this 42mm expander head delivers exact, repeatable cold expansions for soft copper, aluminum, and soft steel tubing—creating the ideal capillary gap for flawless soldering or brazing joints.

Overview

The Rothenberger ROLOCK Power Torque Expander Head 42mm is a dedicated jaw set engineered exclusively for the ROLOCK Power Torque Expander system. Its quick-change mechanism allows for tool-free head swaps in seconds, minimizing downtime on busy job sites. The head's robust construction and corrosion-resistant treatment ensure consistent performance across plumbing, HVAC, and refrigeration applications.

What stands out

• Hardened special steel body resists wear and deformation under high torque.
• ROLOCK-specific connection guarantees secure, wobble-free mounting.
• Cold expansion process preserves pipe wall integrity without heat distortion.
• Precision-machined profile produces uniform capillary gaps for stronger joints.
• Corrosion-resistant surface extends service life in humid or aggressive environments.

Technical details

• Pipe diameter: 42 mm (1 5/8 inch)
• Compatible tool system: Rothenberger ROLOCK Power Torque Expander
• Material: High-quality, hardened special steel
• Application: Expanding soft copper, aluminum, and soft steel pipes
• Expansion method: Cold expansion
• Connection type: ROLOCK system specific
• Manufacturing process: Precision-machined
• Target industries: Plumbing, HVAC, Refrigeration

Our verdict

For professionals who demand speed and accuracy, this expander head is an indispensable addition to the ROLOCK Power Torque system, delivering reliable cold expansions and long-term durability.