Introduction

Stainless steel tubing cutters are commonly used in chromatography, laboratory fluid handling, instrumentation assembly, and general tubing preparation. These tools are designed to create a controlled score line that can facilitate cutting or breaking tubing and capillary materials to the desired length.

While often referred to as tubing cutters, performance can vary significantly depending on the tubing material, outside diameter, wall thickness, and hardness of the material being processed.  Understanding these limitations helps users select the appropriate cutting method and achieve more consistent results.

Compatible Tubing Materials

The stainless steel tubing cutter can be used to score the following materials:

• Carbon steel
• Low-alloy steel
• Steel
• Chrome steel
• Chrome-moly alloys
• Various metal alloys
• Stainless steel
• Titanium
• Copper
• Aluminum
• Copper-nickel alloys

These materials can generally be scored effectively using the cutting wheel mechanism.

Scoring Versus Cutting

It is important to distinguish between scoring and complete cutting.

The tubing cutter is designed to create a controlled score line on the material surface. Depending on tubing dimensions and wall thickness, this score may:

• Result in a complete cut
• Facilitate a clean break
• Require manual snapping after scoring
• Require additional finishing steps

In many laboratory applications, particularly with harder materials or thicker walls, scoring followed by controlled breaking may produce better results than attempting to force a complete cut.

Effect of Wall Thickness on Performance

Wall thickness is one of the most important variables affecting cutter performance.

Thinner Wall Tubing

Generally offers:

• Easier scoring
• Cleaner separation
• Reduced cutting effort
• More predictable results

Thicker Wall Tubing

May result in:

• Greater cutting resistance
• Partial scoring only
• Additional effort required for separation
• Increased likelihood of manual breaking

For this reason, tubing dimensions should always be considered when evaluating cutter suitability.

Maximum Tubing Size Capacity

The cutter has a maximum opening measured from the cutting wheel tip of:  0.1940 inches (approximately 3/16 inch)  Tubing larger than this dimension is not suitable for use with this tool.

Not Recommended

• Tubing greater than 0.1940 inches OD
• Large process tubing
• Oversized laboratory tubing
• Materials exceeding tool opening capacity

Attempting to cut tubing beyond the specified capacity may damage the cutter and produce poor cutting results.

Factors That Affect Cutting Success

Several variables influence actual cutting performance:

• Tubing material
• Material hardness
• Wall thickness
• Outside diameter
• Cutter condition
• Operator technique
• Desired cut quality

Because these variables differ significantly between applications, performance may vary even among tubing having similar dimensions.

Common Laboratory Applications

Stainless steel tubing cutters are frequently used for:

• HPLC tubing preparation
• LC-MS tubing installation
• Fluid path modifications
• Instrument maintenance
• Tubing replacement
• Laboratory plumbing assemblies
• Analytical instrumentation setup

Proper tubing preparation helps maintain connection integrity and improve overall fluid-path performance.

Best Practices

For optimal results:

• Verify tubing diameter before cutting.
• Confirm tubing is within tool capacity.
• Apply gradual cutting pressure.
• Avoid excessive force during scoring.
• Inspect cut ends before installation.
• Deburr or finish tubing if required.
• Replace worn cutting wheels as needed.

Following these practices can improve cut quality and reduce installation issues.

Conclusion

Stainless steel tubing cutters can score a broad range of metals commonly used in chromatography and laboratory applications, including stainless steel, titanium, copper, aluminum, and various alloys. However, cutting performance depends heavily on tubing dimensions and wall thickness. The tool is suitable for tubing up to 0.1940 inches in diameter, and some materials may require manual snapping or additional finishing after scoring.