Built for pros who need reliable inverted double flares on steel brake lines (plus neat 45° single flares on soft tubing), the Robinair Double Flaring Tool Set 6503 delivers repeatable, spec-grade results without the muck-around. Ideal for mobile auto A/C techs, mechanics, and fabricators.

Key Features & Trade Benefits

• Made for steel brake lines — forms strong, inverted double flares to support ADR-compliant brake work when used with specified components and procedures.
• Also does 45° single flares — on copper, aluminium, brass & magnesium (3/16″–5/8″) for fuel, trans and soft-line jobs.
• Includes No. 6514 tubing cutter — square, clean cuts before you flare for better sealing.
• Size adapters included — double-flare adapters for 3/16″, 1/4″, 5/16″, 3/8″, 1/2″ cover common brake & fuel lines.
• Blow-moulded case — keeps dies/yoke organised in the ute; fewer lost parts, faster pack-up.
• Knurled yoke & smooth feed screw — better control and consistency on harder materials.

Why Techs Pick It

Real job: a tech in Parramatta had to remake a rusty rear line roadside in 36 °C. With the 6503 he cut, deburred and double-flared in minutes — leak-free on the pedal test. Too easy. Building out your metal-line kit? See our Flaring & Swaging Kits.

Pro Tip

Cut square, lightly chamfer inside/outside, then add a dab of brake fluid to the die cone — smoother metal flow and cleaner flare faces. For refrigeration copper that needs 45° single flares, use a dedicated HVAC kit to match SAE flare nuts and torque specs.

Compatibility & Use

• Double flares (inverted): Steel brake lines — 3/16″, 1/4″, 5/16″, 3/8″, 1/2″.
• Single flares (45°): Copper, aluminium, brass & magnesium — 3/16″, 1/4″, 3/8″, 7/16″, 1/2″, 5/8″.
• Not for: 37° AN/JIC or metric bubble flares (use the correct kit).
• Best fit: Automotive A/C, brake & fuel lines, general fabrication. For HVAC refrigerant lines, use a purpose-built 45° HVAC flaring tool with torque gauge.

Aussie Conditions

From humid workshops in Brisbane to coastal sheds in Geelong, the carry case keeps everything tidy and the cutter speeds through oxidised line — handy when the clock’s ticking.

What’s in the Box

• Flaring bar & yoke
• Double-flare adapters: 3/16″, 1/4″, 5/16″, 3/8″, 1/2″
• No. 6514 tubing cutter
• Blow-moulded carry case

Specifications

Specs aligned with brand-family listings and AU distributor references.

Warranty & Returns

Covered by standard manufacturer/supplier warranty against defects (return-to-base). Keep proof of purchase and inspect contents on arrival. For change-of-mind or assessment, contact Support for an RMA — no worries.

FAQs

Can I use this on refrigeration copper?
Yes for 45° single flares on soft copper. For HVAC installs, a dedicated refrigeration flaring tool matched to SAE nuts/torque practice is recommended.

Does it make bubble or 37° AN flares?
No. This set is for inverted double flares and 45° single flares.

What sizes are included for double flares?
3/16″, 1/4″, 5/16″, 3/8″ and 1/2″ adapters.

How do I prevent leaks?
Cut square, deburr lightly, lube the die cone, check concentricity, then torque evenly and pressure-test.

Related Products

• After tidy 45° HVAC flares? Imperial 120 Series kits make leak-free joints on copper for refrigeration installs.
• A quick deburr protects seals and saves time — deburring tools keep flare faces smooth.
• Clean, square cuts every time — browse tube cutters that pair well with the 6503.

For manufacturer guidance on flaring tools within the Robinair family, see: Robinair – Hydraulic Flaring Kit.