Rothenberger GIÄTARKA MINIBEND for 1/4, 5/16, 3/8 in (RO 25151) is a compact manual pipe bender engineered for making precise bends in small-diameter tubes. Designed for copper, aluminum and other soft metal tubing, the tool supports common refrigeration, HVAC, plumbing and automotive tubing sizes of 1/4, 5/16 and 3/8 inch. Its small footprint and manual operation make it suitable for use both in the workshop and on-site, where controlled, repeatable bends and minimal tube deformation are required.
Advantages
The compact design enables access to tight spaces while maintaining control over bend radius and alignment. The manual mechanism provides tactile feedback for accurate, repeatable results without the need for power sources. Constructed for use with soft metals, the bender reduces kinking and flattening of the tube wall when operated correctly. The tool is lightweight and easy to position, simplifying tasks that require multiple short runs or in-field repairs.
Suitable for
- Forming precise bends in copper refrigeration and air conditioning lines
- Bending aluminum and soft metal tubing for plumbing installations
- Shaping brake or fuel lines in automotive maintenance and repair
- On-site service and workshop fabrication of small-diameter tube runs
Key specifications
- Compatible tube sizes: 1/4 in, 5/16 in, 3/8 in
- Material compatibility: copper, aluminum and other soft metals
- Operation: manual, hand-operated bending mechanism
- Design: compact, low-profile body for tight access
- Typical use: precision bends with minimized wall deformation
How to use
Select the appropriate die or guide for the tube size and position the tube in the bender so the mark for the intended bend aligns with the bending profile. Hold the tube firmly and operate the handle to form the bend gradually, monitoring the angle until the desired curvature is reached. Release the handle and carefully remove the tube, checking for consistent radius and absence of kinks. For best results, support the tube ends during bending and avoid rapid, forceful movements that can deform the tube wall.
Usage recommendations
Use the bender with clean, straight tube sections and with the correct die for each nominal size. Inspect tubes for soft spots or corrosion before bending. For refrigeration or hydraulic lines, verify system cleanliness after forming and test fittings for proper seating. Store the tool in a dry place to prevent corrosion and periodically check moving parts for smooth operation.
