Pipe cutter ST-319

The ST-319 roller tube cutter is designed for precise and easy cutting of tubes with diameters from 3 to 19 mm (1/8″–3/4″). The high-quality bearing construction ensures smooth operation, less friction and precise pressure adjustment during cutting. It is equipped with an alloy steel blade that ensures long service life and good wear resistance. The lightweight yet robust aluminum housing allows for comfortable work, while the ergonomic triangular adjustment knob ensures good grip and precise adjustment.

Usage:

The ST-319 is suitable for cutting copper, aluminum and other pipes with a diameter of 3–19 mm. It is mainly used in:

• refrigeration and air conditioning systems
• HVAC installations
• service and maintenance work
• assembly and processing of smaller metal pipes

Technical data:

• Type: pipe cutter with cutting wheel
• Cutting range: Ø 3–19 mm (1/8″–3/4″)
• Blade: alloy steel
• Housing: aluminum alloy
• Adjustment knob: triangular shape, ergonomic
• Construction: with bearings, robust

It is important to know

Before choosing a pipe cutter like the Super Stars ST-319, it’s crucial to consider the type and dimensions of pipes you’ll be cutting most often, as well as your own use of the tool – whether you need it for regular maintenance work or just occasionally. A tool can be a necessary addition to your air conditioning service, but its practical usefulness only proves to be if it meets your specific needs. There are a few less obvious details to consider before making a purchase:

• For optimal use, the type of tool must be matched to the type of pipe (material, wall thickness), as this directly affects the quality and accuracy of the cut.
• When choosing such an accessory, it is not appropriate to assume universality: check that the knife is suitable for your pipe dimensions (even for smaller and larger diameters within the specified range).
• If you only use the device occasionally, it makes sense to choose a more robust model that can withstand less frequent, but perhaps rough, use - otherwise you may quickly notice wear on the blades or housing.
• Tools designed for specific pipe diameters are generally not suitable for thicker walls or non-standard materials – such applications may require specialized tools.

Source of editorial recommendations: general verifiable guidelines for product selection.

In practice

🟢 Cutting copper pipes in standard air conditioning systems

Very suitable – the product is designed for typical pipe diameters most commonly used in the installation or repair of air conditioning installations.

🟡 Cutting pipes of non-standard materials or very thick walls

Suitable with limitations – for materials that are not common for air conditioning installations (e.g. particularly hard plastics, non-standard metals) or pipes with a particularly thick wall, usability may be limited, affecting cutting accuracy and tool wear.

🟢 Quick replacement or repair during occasional services

Very convenient – the design makes the knife practical for quick and clean cutting when you need a reliable tool in the field without lengthy preparation or additional settings.

🔴 Cutting pipes outside the specified diameter range

Less suitable – if you frequently encounter pipes outside the specified measurement range, using this tool is not recommended as it may cause damage to the tool and poor results.

Answers to frequently asked questions

Is this knife suitable for cutting plastic pipes?

The knife is primarily intended for standard metal (e.g. copper) pipes, so its usability with plastic pipes is not always guaranteed.

What should I check before buying regarding compatibility?

Check the diameter and material of the pipes you cut most often and compare it to the specified range and product description.

How difficult is blade maintenance?

Maintenance is easy – regular cleaning and occasional blade sharpness checks are recommended to extend the life of the tool.

Description updated: September 2026

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