NAVAC NTF66 45-Degree Flaring Tool, Eccentric Cone & Internal Clutch — Nitride Finish

The NAVAC NTF66 is a professional 45-degree HVAC flaring tool that uses an eccentric cone and an internal clutch to produce precise, leak-resistant flares on common copper tubing sizes.

Built for HVAC technicians and serious DIYers, the NTF66 combines a hardened nitride finish, a patented rivet connection, and an internal clutch to reduce over-torquing while delivering consistent 45° flares on 1/4" through 3/4" outside-diameter copper tubing. It’s designed to speed up jobsite work and extend tool life without sacrificing accuracy.

How does the eccentric cone improve flare quality?

The eccentric cone geometry centers and forms the tubing into a true 45-degree flare, minimizing uneven lip formation and potential seal problems. Because the shaping action is optimized for common HVAC tubing sizes, the result is a uniform flare face that mates cleanly with fittings.

• Produces consistent 45° flares across specified tube sizes
• Reduces uneven edges that cause leaks
• Works with both soft and work-hardened copper

What does the internal clutch protect against on the NTF66?

The built-in clutch limits applied torque so the operator can’t over-tighten while forming the flare. This feature protects the tool internals and the tubing, preventing ripped threads, distorted flare lips, or premature tool wear from excessive force.

• Clutch disengages at a safe torque threshold
• Prevents over-squeezing and tube damage
• Improves repeatability by standardizing user force

Which tubing sizes and materials are compatible with this flaring tool?

The NAVAC NTF66 is made for standard HVAC copper tubing outside diameters: 1/4", 5/16", 3/8", 1/2", 5/8", and 3/4". It handles common copper types used in refrigeration and air-conditioning installations, giving technicians broad coverage with one tool.

• Supports six common O.D. sizes from 1/4" to 3/4"
• Works for typical refrigeration and A/C copper tubing
• Single tool replaces multiple specialty flaring heads

How durable and serviceable is the NTF66 for regular jobsite use?

The tool is nitride-treated for surface hardness and corrosion resistance, and its riveted axial spacing gives stable mechanical alignment during repeated use. NAVAC backs the tool with a one-year warranty to encourage regular professional use and to provide coverage for manufacturing defects.

• Nitride treatment increases wear resistance and lifespan
• Patented rivet connection maintains consistent alignment
• One-year warranty supports professional service use

Who is this for: The NAVAC NTF66 is ideal for HVAC technicians, refrigeration specialists, and experienced homeowners who need a rugged, accurate flaring tool that saves time and reduces rework. If you frequently make 45° flares on copper tubing and value repeatability, a built-in torque safeguard, and a corrosion-resistant finish, the NTF66 is engineered to meet those demands while simplifying tool selection on the truck.