NAVAC NTF66 HVAC Flaring Tool — 45° Eccentric Cone, Internal Clutch, 1/4–3/4"

The NAVAC NTF66 is a heavy-duty HVAC flaring tool that creates consistent 45° flares on copper tubing while protecting the tool and fittings with an internal clutch and durable nitride finish.

Built for HVAC technicians and service professionals, the NTF66 combines precision engineering with long-lasting materials. It uses an eccentric cone for accurate 45-degree flares across common tubing sizes, an axial spacing design and patented rivet connection for repeatable results, and an internal clutch to reduce the risk of over-torquing. NAVAC backs the tool with a one-year warranty to support reliability on the job.

How does the NTF66 prevent over-torquing and tool damage?

The NTF66 integrates a built-in internal clutch that disengages when torque exceeds the preset threshold, protecting both the flaring mechanism and the copper tubing. This feature reduces operator guesswork and helps avoid ruined fittings or stripped threads.

• Internal clutch system limits excess torque
• Protects flaring cone and tubing from mechanical stress
• Improves repeatability by preventing inconsistent force

Which tubing sizes and flare angle does it support?

Designed for common refrigeration and HVAC copper tubing, the NTF66 handles outside diameters from 1/4" up to 3/4". The eccentric cone forms a standardized 45-degree flare, compatible with most flare fittings and assemblies used in service work.

• Compatible sizes: 1/4", 5/16", 3/8", 1/2", 5/8", 3/4"
• Eccentric cone produces precise 45° flares
• Works for refrigeration and HVAC flare fittings

What design features ensure consistent, leak-proof flares?

Axial spacing and a patented rivet connection keep the cone and clamp aligned during flaring, which reduces wobble and keeps the flare geometry uniform. A nitride-treated finish adds surface hardness and corrosion resistance for stable performance over many cycles.

• Axial spacing maintains accurate alignment during forming
• Patented rivet connection secures components for repeatability
• Nitride treatment improves durability and wear resistance

What support and warranty does NAVAC provide?

NAVAC includes a one-year warranty to cover manufacturing defects and give technicians confidence in daily use. The warranty complements the tool's build quality, helping shops manage tool upkeep and replacement planning.

• One-year limited warranty from NAVAC
• Durable construction intended for frequent field use
• Designed to reduce downtime with consistent results

Who is this for: The NAVAC NTF66 is tailored to HVAC and refrigeration technicians, service contractors, and dedicated DIYers who need a reliable, portable flaring tool for field repairs and system installations. It’s best for users who value repeatable 45° flares across a wide range of copper tube sizes, require a tool that resists wear, and appreciate built-in torque protection to safeguard fittings and minimize rework.