Tube Cutter & Flaring Tool Guide

The matching socket and drive size live in our Socket Size Chart — every common fastener head covered.

Tube cutters and flaring tools sit in every plumber, refrigeration mechanic, brake-line technician and maintenance fitter's kit for the same reason: a hacksaw can't deliver a square, burr-free, deformation-free cut on copper, brass, stainless or thin-wall steel, and a hacksaw cut won't take a flare. This guide covers every cutter geometry stocked at AIMS — wheel cutters, ratchet cutters, telescopic, mini, internal, chain-style — plus single, double and bubble flaring tools for plumbing, refrigeration and automotive brake-line work.

Honest scope upfront: AIMS doesn't stock Milwaukee, Ridgid, Knipex or Rothenberger (the global premium brands that carry significant brand-keyword search volume). What AIMS does stock is the AU industrial-supply equivalent — Garrick Herbert, Trax, Maverick, Sterling and Noga — at trade-tier pricing for plumbers, HVAC/refrigeration mechanics, automotive workshops and industrial maintenance teams. Bunnings and the consumer hardware tier carry entry-level Wynns and Cyclone for the DIY audience; AIMS is the next tier up.

Tube Cutter vs Pipe Cutter vs Hacksaw — When to Use Each

The terms "tube cutter" and "pipe cutter" are used interchangeably in AU trade conversation, but in supplier catalogues they map to different products: a tube cutter usually means a small-to-medium wheel cutter for thin-wall copper, brass, aluminium and stainless tube up to about 35mm OD; a pipe cutter usually means a larger heavy-duty wheel or chain cutter for thicker-wall steel pipe up to 150mm NB. Both work on the same principle — a rotating hardened cutter wheel scores progressively deeper as you tighten — but the geometry, jaw capacity and wheel hardness differ.

A hacksaw works on anything, but the finish is the problem: rough, square-deviated, deformed at the edge, and full of burrs. Worse for plumbing and refrigeration — a hacksaw cut cannot be flared because the edge isn't square enough for the cone to seat evenly. Use a hacksaw for cutting threaded steel rod or rough-cutting where a re-finish step follows. Use a tube/pipe cutter when the cut surface is the working surface.

Cutter Types — Wheel, Ratchet, Chain, Internal, Mini

Wheel cutter — the workshop standard

Single hardened cutter wheel runs against two or three rollers. Pipe rotates 360° around the static cutter as you incrementally tighten the wheel feed. The Garrick NB Pipe Cutter ($127.68) and Garrick Telescopic Tube Cutter ($55.78) sit in this category — Garrick covers a wide nominal-bore range with rated jaw capacity for copper, brass, aluminium and thin-wall steel. Trax ARX-15K178 Universal Pipe Cutter ($45.50) handles 3-30mm and is the workshop default for plumber and HVAC work.

Ratchet pipe cutter — heavy-wall and steel pipe

Ratchet mechanism replaces the screw feed. Each handle compression advances the cutter wheel a few degrees. Good for thick-wall steel pipe, low-clearance positions, and operators who want speed over fine control. The MVRK Dual Gear Ratchet Pipe Cutter ($40.31) is the AIMS-stocked option — Maverick brand, AU industrial-trade pricing.

Chain pipe cutter — cast iron and large-NB steel

Chain wraps the pipe; multiple cutter wheels embedded along the chain length all bite simultaneously. As the chain ratchets tighter, the cutters score the pipe circumference at once. The Garrick Tri-Stand Chain Vice with Chain Pipe Vice ($651) handles 6–150mm NB pipe — heavy-duty cast iron drainage work and large-bore steel where a wheel cutter can't get around the pipe. On cast iron, the cut is actually a controlled snap — the chain cutters score a deep circumferential groove, then a final ratchet snaps the brittle iron along the score line. Different to ductile metal cutting. Captures "chain pipe cutter" 90/mo AU keyword at CPC $90 — niche but heavy-commercial industrial-maintenance audience.

Mini tube cutter — tight spaces

Same wheel mechanism, scaled down to fit in confined spaces — wall cavities, behind cabinets, under sinks. The Garrick Herbert 6430-1 Mini Tube Cutter ($31.50) handles 3–30mm copper and brass; the Garrick Herbert 7330-1 Tube Cutter No.30 ($30.32) is the alternative compact format. Operating clearance: a mini cutter needs only about 1/3 of a full rotation, where a standard cutter needs full 360° clearance.

Internal pipe cutter — flush-to-wall recovery

When a galvanised stub-out has snapped off below floor level, or a brass nipple has corroded in flush to the wall, you can't get a wheel cutter onto it from the outside. An internal pipe cutter (also called a "flush cutter" or "stub-out cutter") inserts into the pipe bore and cuts from the inside out. Tight specialty product — captures "internal pipe cutter" 100/mo AU keyword at CPC $140. Not currently stocked at AIMS — source on request through supplier network for one-off jobs.

Sterling and economy tube cutters

Entry-level workshop cutters for general use. The Sterling Red Tube Cutter TC-11 ($7.55) is the lowest-cost replaceable-blade tube cutter AIMS stocks — apprentice kit standard, glove-box spare, single-job tool.

Cutter Wheel Materials — Standard Steel, Hardened, Stainless-Specific

The cutter wheel is the wear part. Three grades matter:

• Standard hardened steel — copper, brass, aluminium, thin-wall mild steel. Most cutter wheels stocked are this grade. Long life on soft metals.
• High-hardness steel — thick-wall steel pipe, stainless tube. Required when standard wheels dull within 5-10 cuts. Garrick replacement cutter wheels ($14.36) and Garrick Cutter Wheel ($10.84) are sized for the 6430/7330/7435 Garrick range.
• Stainless-specific cutter wheel — dedicated wheel for stainless tube only. Critical rule: never use a standard carbon-steel cutter wheel on stainless. Carbon transfer from the wheel onto the stainless surface seeds rust within days. Same logic as the wire brush rule: stainless gets its own wheel, full stop. Forum-documented across r/Plumbing, Practical Machinist, and Eng-Tips threads. AIMS — source dedicated stainless wheels on request through Garrick or specialty supplier.

Materials Compatibility Matrix

Plastic Pipe Cutters — Scissor vs Ratchet vs Wheel

PVC, PEX, multilayer and poly pipe cannot be cut cleanly with a metal-tube wheel cutter — the wheel compresses and deforms the plastic, leaving an oval cross-section that won't seat into push-fit or compression fittings. Plastic pipe cutters use a blade (not a wheel) that slices through the wall in a single shearing action. Scissor-style for ≤25mm, ratchet-style for 25-42mm. Captures "pvc pipe cutter" 700/mo AU + "poly pipe cutter" 150/mo + "plastic pipe cutter" 100/mo (CPC $140) — strong commercial-intent plumbing cluster.

AS/NZS 3500 plumbing requirement: PVC cuts must be free of shavings and burrs that would obstruct flow or interfere with solvent-weld joints. A blade cut achieves this; a wheel-cut PVC pipe doesn't (deformed walls won't seat in fittings). The cutter is non-optional for compliant work.

Flaring Tools — Single, Double and Bubble Flares

A flare is a coned outward expansion of the tube end that seats against a matching cone in a fitting. The flare itself is the seal — no thread tape, no compound, just metal-on-metal cone contact under torque. Three flare profiles dominate the AU market:

Brake Line Flaring — Double Flare vs Bubble Flare (Automotive Critical)

Automotive brake hydraulic systems require either a double flare (US, AU, most Australian-built and US-built vehicles) or a bubble flare (European, most Asian — Toyota, Honda, Nissan, BMW, VW). A single 45° flare is NOT acceptable for brake hydraulic service — the single thickness of metal at the cone can split under hydraulic pressure, especially after fatigue cycling. DOT (US) and ADR (AU vehicle standards) both require double or bubble flares on brake line connections.

How a double flare works: the tube end is first flared outward to about 45° (the single flare), then the tip is folded back inward on itself — doubling the wall thickness at the cone. The result is twice the metal thickness at the seating surface, which is why it can hold against 2,000+ psi brake hydraulic pressure without splitting.

How a bubble flare differs: instead of folding inward, the tube end is rounded outward into a bubble shape against a forming die. Common on European/Asian vehicles. The flaring tool kit must include the bubble forming die or you cannot make this flare.

AIMS brake-line flaring options:

• Trax ARX-FST200 Heavy Duty Double Flaring Tool Kit ($159.60) — handles 3/16" to 5/8" brake line. Workshop standard.
• Trax ARX-FTD250A Double Flaring Tool Kit ($95.90) — mid-tier brake-line kit.
• Garrick FT-DFS Double Flaring Tool Standard Kit (3/16-5/8) ($81.90) — Garrick AU industrial-grade brake-line kit.
• Garrick HD Eccentric Flaring Tool Kit (1/4-3/4) ($210.00) — heavy-duty eccentric press for larger tube. Eccentric design applies even pressure around the full circumference (vs flat-clamp pressure that can deform thin-wall tube).

Refrigeration and HVAC Flaring — R32, R410A, R290 Compatibility

Refrigeration and split-system air-conditioning use 45° SAE flares almost exclusively on copper line-sets up to about 5/8" OD. The flare must be smooth, concentric, full-depth (no under-flaring) and free of micro-cracks at the cone surface — any defect leaks refrigerant.

R32, R410A and the newer R290 (propane) refrigerants run at higher operating pressures than legacy R22 — R32 system pressure can hit 4 MPa (40 bar / 580 psi) under high-ambient conditions. A poorly-formed flare that held R22 for a decade will start weeping R32 within months. Standards have tightened accordingly.

AIMS refrigeration flaring options:

• Trax ARX-FST210 Swaging & Tube Cutter Kit ($142.10) — combination kit: cuts the tube, swages the end for slip-joint expansion (one tube ID expanded to mate with another tube OD), and the swaging dies double as flaring components for AS/NZS HVAC service work.
• Trax ARX-FTT260B Flaring Tool & Tube Cutter Set ($100.80) — cutter + flaring tool combination for refrig/HVAC install.
• Garrick FT-U Universal Flaring Tool (5-16mm) ($45.61) — entry-level universal 5-16mm copper flaring tool.

Swaging is the operation that expands one tube's OD into a "socket" so a same-OD tube can slip into it — eliminates a coupling fitting on a copper line. Common technique in HVAC service work to eliminate joints and joint-leak risk. The Trax FST210 swaging kit ($142.10) covers this dual function.

Eccentric vs Concentric Flaring Tools — Why It Matters on Thin-Wall Tube

Most flaring tools use a flat clamp block — the tube is locked in a die hole, and a press cone descends into the tube end to flare it. The clamp force comes from one direction (the clamp screw or lever). On thin-wall tube, particularly soft copper and aluminium, this single-direction clamp force can deform the tube cross-section into an oval before the flare even forms. The resulting flare is non-concentric — uneven cone thickness around the circumference — which seats unevenly in the fitting and leaks.

An eccentric flaring tool like the Garrick HD Eccentric Flaring Tool Kit ($210.00) applies clamp pressure around the full circumference of the tube simultaneously, plus the forming cone rotates eccentrically as it descends — pressing the tube wall outward in a sweeping motion rather than a single ram. The result is a more concentric, uniform flare with less deformation risk. Preferred for premium HVAC work, aerospace tubing, and where flare integrity must be perfect first time.

For most workshop and trade work, a quality concentric (flat clamp) tool like the Garrick FT-DFS ($81.90) or Trax FST200 ($159.60) is more than adequate.

Tube Reamers — The "After the Cut" Step Most People Skip

Every wheel-cut tube has an inner burr — the wheel pushes a small ridge of metal inward at the cut edge as the wheel scores deeper. That inner burr does three things if you don't ream it off: (1) restricts flow, especially on smaller bore tube where the burr can occupy a meaningful percentage of the cross-section; (2) creates turbulence at the joint, which on refrigeration lines means accelerated wear and oil-return problems; and (3) on a flared end, the burr interferes with the cone forming evenly — micro-cracks at the flare seat are a direct consequence.

The fix: ream the cut. A tube reamer cuts the burr away from the inside of the tube end. Noga PC6000 25 to 75mm Inner-Outer Reamer ($205.90) covers both inner and outer burrs — outer burr on the cut end matters for sliding into push-fit couplings; inner burr matters for flow and flaring. Built-in reamers on most quality tube cutters (the small triangle blade that swings out from the cutter body) cover smaller diameters; the Noga handles the 25-75mm range where built-in reamers don't reach.

Forum-validated practice: r/Plumbing, HVAC-Talk and Practical Machinist consensus — "always ream the cut" is the #1 advice given to apprentices learning copper work. The 10-second reaming step prevents 6-month leak callbacks.

Pipe Vices and Chain Vices — Holding the Pipe While You Cut

Workshop bench: the pipe needs to be held rigidly while you score the cutter wheel. On bench vices a standard engineer's vice grips the pipe directly but can deform it (jaw marks). A dedicated pipe vice — jaws shaped for round stock — holds without deforming. On-site: a chain pipe vice wraps the pipe and clamps it down to a portable workstand or tripod.

AIMS pipe-holding options:

• Garrick Tri-Stand Chain Vice with Chain Pipe Vice 6-150mm NB ($651) — tripod-mounted chain vice for in-situ work, full 6-150mm NB pipe capacity. The pipe wrenches collection and plumbing tools collection round out the holding kit.
• Garrick Bench Chain Vice ($79.63) — bench-mounted chain pipe vice for workshop use. Smaller capacity than the tri-stand but workshop-fixed.

Common Mistakes — From AU Trade and Workshop Forums

Brand Reality — AIMS Stock vs Premium Global Alternatives

AIMS Supply Ladder by Trade

Plumber starter kit: Trax Universal Pipe Cutter ($45.50) + Garrick Mini Tube Cutter ($31.50) + Garrick FT-U Universal Flaring Tool ($45.61) + Noga PC6000 Reamer ($205.90). Total ~$330 covers domestic plumbing copper/brass work with refrigeration-style flare capacity.

HVAC/refrigeration tech: Trax ARX-FST210 Swaging + Tube Cutter Kit ($142.10) + Trax ARX-FTT260B Flaring + Cutter Set ($100.80) + Noga reamer ($205.90). Total ~$450 covers split-system install, refrigeration line-set flaring and swaging for R32/R410A/R290 systems.

Automotive brake-line technician: Trax ARX-FST200 Heavy Duty Double Flaring Tool Kit ($159.60) or Garrick HD Eccentric Flaring Tool Kit ($210.00) + small tube cutter — Garrick 6430-1 Mini ($31.50). DOT-compliant double flares for brake hydraulic service work. ~$190-240.

Industrial maintenance fitter: Garrick NB Pipe Cutter ($127.68) + Garrick Tri-Stand Chain Vice 6-150mm ($651) + Garrick Bench Chain Vice ($79.63) covers in-plant pipework up to 150mm NB. ~$860 covers a maintenance department's pipe-work needs.

Selection Checklist — Buying the Right Cutter and Flaring Tool

1. What material? Copper/brass → wheel cutter standard. Stainless → dedicated wheel. Steel → ratchet or chain. PVC/PEX → plastic blade cutter.
2. What diameter range? ≤30mm copper → mini cutter. 3-50mm general → universal/telescopic. 50-100mm steel → ratchet. 100-150mm NB cast iron → chain.
3. Will it be flared? Yes → tube cutter (not hacksaw). What flare angle? 45° SAE for refrig/HVAC/gas/standard auto. Double 45° for brake hydraulic. Bubble for Euro/Asian car brake. 37° JIC for hydraulic systems.
4. Where is the work done? Workshop bench → bench vice + standard cutter. In-situ wall/ceiling → mini cutter + chain vice on tripod.
5. Volume of work? Occasional → entry-level kit OK. Daily trade use → mid-tier or premium kit, dedicated stainless wheel where applicable.
6. Reamer included? Built-in deburring blade on the cutter for small tube ≤25mm. Noga reamer for 25-75mm tube where built-in blade doesn't reach.
7. Pipe holding? Bench → engineer's or pipe vice. On-site → chain vice on tripod for in-situ work.

Frequently Asked Questions

What's the difference between a tube cutter and a pipe cutter?

In AU trade conversation the terms are interchangeable. In supplier catalogues, "tube cutter" usually means a smaller wheel cutter for thin-wall copper, brass, aluminium and stainless tube up to about 35mm OD. "Pipe cutter" usually means a larger heavy-duty cutter for thicker-wall steel pipe up to 150mm NB. The cutting mechanism is the same (rotating cutter wheel); the size, jaw capacity and wheel hardness differ.

Can I use a hacksaw instead of a tube cutter?

For threaded rod, rough cuts, or any cut that will be machined later — yes, a hacksaw is fine. For any tube end that will be flared, soldered, push-fit jointed, or compression-fitted — no. A hacksaw cut is too rough, often non-square, and full of burrs. The fitting won't seat correctly. Use a tube cutter for anything where the cut surface is the working surface.

Why does the cutter wheel leave a burr inside the tube?

The wheel scores progressively deeper, pushing a small ridge of metal inward at the cut edge. That inward ridge is the inner burr. Always ream it off after every cut — restricts flow, causes turbulence at joints, and on a flared end interferes with the cone forming evenly. Built-in reamer blade on the cutter handles small tube; the Noga PC6000 reamer covers 25-75mm.

Do I need a different cutter wheel for stainless steel tube?

Yes — dedicated stainless cutter wheel. Carbon-steel wheels transfer iron particles to the stainless surface at the cut. Those embedded particles oxidise within hours-to-days, creating "rust" on a "stainless" pipe — the customer callback arrives 2-3 weeks later. Same cross-contamination rule applies to wire brushes, grinding discs and files: stainless gets its own dedicated tooling, full stop.

What's the difference between a single, double and bubble flare?

A single flare is one outward 45° cone — used for refrigeration, HVAC, gas, low-pressure plumbing. A double flare folds the tube end back inward on itself, doubling the wall thickness at the cone — required for automotive brake hydraulic lines (DOT/ADR mandated; single flares split under brake pressure). A bubble flare rounds outward into a bubble shape — used on European and most Asian vehicle brake lines (Honda, Toyota, BMW, VW).

Can I use a 45° SAE flare on a 37° JIC fitting?

No. The cones don't match. The joint will leak and eventually fail. SAE 45° is for refrigeration, HVAC, gas and standard automotive. JIC 37° is for hydraulic systems (industrial, mobile plant). Always verify the fitting angle before flaring the tube — the flaring tool clamp block must match the fitting cone angle.

Why is my freshly-flared connection leaking?

Most common causes ranked: (1) tube cut wasn't reamed — inner burr disturbed flare formation; (2) flare cone clamp over-tightened during forming — cracked the flare; (3) cutting fluid/oil not used on the cone — galling and micro-cracks; (4) flare angle mismatch with fitting (45° vs 37°); (5) tube material too hard or work-hardened from previous bending; (6) fitting cone surface damaged. Re-cut, re-ream, re-flare with a drop of oil on the cone, hand-tight + 1/4 turn maximum on the forming clamp.

What's the AS/NZS standard for plumbing tube cutting?

AS/NZS 3500 (Plumbing and Drainage) requires PVC cuts to be square and burr-free with no obstruction to flow or fitting seating. AS/NZS 5601 (Gas Installations) requires copper gas pipe to be cut with a wheel cutter (not hacksaw) and reamed before flaring/soldering. AS/NZS 3500.4 specifically addresses heated water and the cleanliness requirements for soldered copper joints — cut quality is part of joint integrity.

Can a wheel cutter cut stainless steel tube?

Yes — with a dedicated stainless cutter wheel and slow feed. Standard carbon-steel wheels will work briefly on thin-wall stainless but dull within a few cuts and contaminate the surface. For sustained stainless work, invest in a stainless-specific cutter wheel and label it (tag, dedicated tool box, separate storage).

Why use a chain pipe cutter on cast iron drainage pipe?

Cast iron is brittle — it scores cleanly but doesn't cut continuously. A chain cutter wraps the pipe and scores the full circumference simultaneously. A final ratchet snaps the brittle iron along the score line. Wheel cutters won't progress through cast iron (too thick, too brittle), and hacksaw cuts are slow and uneven. The Garrick Tri-Stand Chain Vice ($651) integrates the chain cutter mechanism with the pipe vice.

What's swaging and when do I need a swaging tool?

Swaging expands one tube's OD into a "socket" that another same-OD tube can slip into — eliminates a coupling fitting. Common HVAC/refrigeration practice to reduce joint count on copper line-sets (fewer joints = fewer leak points). The Trax FST210 Swaging + Tube Cutter Kit ($142.10) handles standard refrigeration line-set sizes. Swaging requires the tube to be annealed (soft copper) or annealed locally with a torch before forming.

What's the difference between eccentric and concentric flaring tools?

Concentric (flat-clamp) flaring tools press the forming cone straight into the tube end from one direction. Single clamp pressure direction can deform thin-wall tube into an oval. Eccentric flaring tools — like the Garrick HD Eccentric Flaring Tool Kit ($210) — apply circumferential pressure and the cone rotates eccentrically as it descends, sweeping the metal outward more uniformly. Better flare quality on thin-wall and aluminium tube. For standard workshop work, a quality concentric tool is fine; for premium HVAC or aerospace work, eccentric is preferred.

Can I cut PEX pipe with a wheel tube cutter?

No. PEX, PVC, polyethylene and multilayer plastic pipe compress and deform under the wheel — the cross-section ends up oval, which won't seat in push-fit, crimp or compression fittings. Use a dedicated plastic pipe cutter — scissor-style for small diameters, ratchet-style for 25-42mm. The blade slices through the wall in a single shearing action without compressing the cross-section.

How do I cut a pipe flush to a wall or floor?

External wheel cutters can't reach close to a wall or floor — they need 360° clearance around the pipe. Two options: (1) mini cutter, which needs only about 1/3 of a rotation — gets you within about 15mm of the wall depending on cutter dimensions; (2) internal pipe cutter, which inserts into the bore and cuts from the inside out. For a flush-to-floor stub-out recovery, the internal cutter is the dedicated tool. Source through specialty plumbing supplier — not currently stocked at AIMS.

What standards govern automotive brake-line flaring?

SAE J512 covers 45° flare profiles (single and double). DOT specifies double flares (or bubble flares for Euro/Asian vehicles) on hydraulic brake lines — single flares are not acceptable. ADR (Australian Design Rules) align with international standards for vehicle braking systems. Brake-line work that fails the flare specification fails roadworthy inspection and creates liability exposure on commercial vehicle servicing.

For complete pipe and hose context across hydraulic, pneumatic and gas systems, see our companion guides: hydraulic fittings, pneumatic fittings, industrial hose.

Need help choosing the right tube cutter or flaring tool for your trade or workshop? Call AIMS Industrial on (02) 9773 0122 or contact our trade team — we'll match the kit to your application.