How to Buy a Scrap Metal Shear from China: A Complete Guide

Buying a gantry shear from China is a ten-year decision that gets made in about two weeks. The machine itself is 30 to 45 days of build time; everything that determines whether it was the right purchase — your heaviest material, your shift pattern, your power supply, your crane — is decided long before the deposit clears. This guide is the sequence we walk through with buyers on the first call, written down so you can run it before you request a quotation.

A quick note on who we are: HUAXIN builds hydraulic scrap metal shears in Tangshan, China, and sells them factory-direct to yards, demolition contractors and mills around the world. Everything below comes from what we see go right and go wrong on real orders. Where a number matters, it is the number published on the product page, not a sales figure.

What a Scrap Metal Shear Actually Does

A shear is a cutting machine. It sizes charged material — HMS 1&2, plate and section steel, structural offcuts, rebar — by slicing it against a fixed blade with a moving box or blade arm driven by hydraulic cylinders. The output is clean, dense and furnace-ready, which is why shredder-free yards still run a shear at the head of the line.

Force and opening are the two numbers that matter: rated cutting force in tons, and the box or chamber dimension that sets the largest piece that can physically enter. Both matter, and they matter independently. A big box with insufficient force stalls on heavy plate; enormous force with a small box forces you to pre-cut everything by torch, which is labor you pay for on every shift for the life of the machine.

What a shear does not do is reduce bulky mixed waste to a small clean fraction. That is a shredder’s job. Yards whose main problem is volume of mixed material are shredder customers; yards whose main problem is oversized steel are shear customers. Plenty of lines run both, with the shear first.

Step 1: Start From Your Heaviest Material, Not the Tonnage

The honest first question is not “how many tons do I need” but “what is the thickest, hardest piece that arrives at my gate every week?” Plate thickness and material grade set the floor. Turnings, thin sheet and light section stay on the smaller classes; HMS 1&2, crane rail and thick plate push the requirement up.

Write down the three heaviest items you process weekly — actual measurements, not estimates. If those three items sit comfortably inside a machine’s published material capability, the tonnage is probably right. If they sit at the top of the range with no margin, move up a class: running at the limit shortens blade life and stresses the frame, and the saving on the machine price disappears into wear parts inside two years.

One honesty point that saves buyers money: if your heaviest material arrives occasionally rather than weekly, say so. A machine sized for your typical week with the occasional piece handled by a different method beats a machine sized for your worst day.

Step 2: Size the Tonnage on the Ladder

Our gantry shear range runs from 200 to 2000 tons, and the ladder is not marketing decoration — each class exists because a distinct feed profile needs it. The capability boundaries below are the published figures from each product page, and they are the numbers to compare your material list against.

Class	Typical fit	Output	Continuous cutting	Occasional
200 ton (Q91-200)	Small yards, single shift, light to medium scrap	20-40 t/day	Light to medium plate	HMS 1&2 in small quantities
315 ton (Q91-315)	Growing yards moving to two shifts	25-45 t/day	30 mm plate	50 mm plate
400 ton (Q91-400)	Commercial yards, mixed steel	35-55 t/day	40 mm plate	55 mm plate
500 ton (Q91-500)	Demolition contractors, concrete-adhered sections	45-60 t/day	50 mm plate	65 mm plate
630 ton (Q91-630)	Yards running continuous HMS	60-80 t/day	60 mm plate	80 mm plate
1000 ton (Q91-1000)	Mid-size plants, high throughput, bale cutting	100-120 t/day	100 mm plate	130 mm plate
1250 ton (Q91-1250)	Plants feeding a mill or foundry line	160-200 t/day	120 mm plate	150 mm plate
1600 ton (Q91-1600)	Steel mills, three-shift duty	200-240 t/day	150 mm plate	190 mm plate
2000 ton (Q91-2000)	Largest yards and mills, heaviest feed	250-300 t/day	170 mm plate	210 mm plate

Two patterns in that table are worth reading twice. First, continuous HMS duty starts at the 630-ton class — below it, HMS is an occasional material, not a daily one. Second, bale cutting starts at 1000 tons: if baled material is part of your feed, the honest answer is the 1000-ton class or above, not a hope and a bigger blade.

Where you settle inside a class has more to do with shift count than with tonnage pride. A 630-ton machine on two shifts will out-produce a 1000-ton machine fed by one operator with a crane that cannot keep the box charged.

Step 3: Chamber Size Decides Your Labor Bill

Two shears of equal tonnage can take completely different material. The box opening decides the largest piece that goes in one bite. Every piece you must pre-cut by torch or hand saw is labor you pay for on every shift for the life of the machine — and it is the cost buyers forget when they compare quotations.

Take the three heaviest items from Step 1 and set them against the chamber dimensions on the product page. If the fit is marginal, go up a chamber size even at the same tonnage: the upgrade costs less than the labor it saves in the first year. And check the feeding tank length while you are there — a longer box takes whole structural members instead of pre-cut sections, which changes what your crane operator does all day.

Step 4: Duty, Shift Count and Blade Life

Blade life is the number buyers forget, and it is the number that decides your operating cost. Abrasive, contaminated feed wears blades faster than clean HMS on the same machine. Be honest about your feed before ordering: mixed or dirty material earns a different blade configuration and steel grade than the standard build.

The standard blade build uses H13 or M6V tool steel at 56-62 HRC, four-edge reversible, with published life measured in thousands of tons per set depending on feed. Regrinding is part of the cycle — plan the regrind interval and the spare edge set into your operating budget from day one, not after the first surprising wear bill.

Shift count matters as much as material. A build quoted for single shifts is not the build quoted for three-shift continuous duty — frame, seals and hydraulics all change. Give your supplier the real duty at quotation, not the duty you wish you had. The machine that comes back will be built for the duty you described.

Step 5: Power Supply and Installation

Shear installations are heavy electrical projects. Motor ratings in this class often exceed what a small yard’s supply can start, and the starting method — direct-on-line, star-delta or soft start — must be matched to your transformer before the machine is built, not after it ships.

Machines are built for 380 V, 400 V or 415 V at 50 Hz, or 60 Hz supply to order. Confirm three things with your electrician first: the voltage and frequency available, the spare capacity in kilowatts, and the route the machine travels into the building. Foundation drawings and electrical schematics ship with every machine — send them to your contractor the week the order is placed, not the week the machine arrives.

The receiving end deserves its own checklist: door widths, floor loading along the route, and crane hook height at the set-down point. Send site photos with your inquiry and route problems get flagged before the build, which is the only cheap time to solve them.

Step 6: Discharge, Feed and Downstream

A shear runs at the speed of the crane that feeds it and the handling that clears its output. Plan three flows before ordering: material in, cut scrap out, and where cut pieces accumulate. A machine whose output piles up under the box spends half its shift waiting.

Also decide who ties, stacks and loads. On busy yards the cut material goes straight onto a conveyor to a scrap metal baler or a bunker; on small yards it is handled by the existing loader. Discharge height and arrangement are confirmed at quotation against your layout — use that review rather than discovering the mismatch at commissioning.

What the Buying Process Looks Like

An import that goes well looks boring, and it runs on four parallel tracks: the machine, the site, the paperwork and the people. Here is the shape of it.

Send your heaviest material list, your shift pattern and your site supply with the first inquiry. Quotations come back within two business days, factory direct, with the specification sheet your electrician and foundation contractor can work from. The deposit starts the build, and standard configurations ship in 30 to 45 days; non-standard chamber, motor or control combinations run longer, with the exact date confirmed in writing.

During the build window the useful work is at your end: foundations, electrical scope, delivery route, operator scheduling. Documentation — commercial invoice, packing list, bill of lading and the certificate set — is prepared alongside the build, so ask for drafts with the quotation and your broker can classify early.

Commissioning is part of the purchase, not an extra. We send an engineer for leveling, electrical connection, no-load and load runs and operator training; repeat configurations can be commissioned remotely if you prefer. The week the machine arrives is leveling and connection, the week after is test runs, and the third week is your operators running it with training fresh. Plan production around that shape.

What It Costs to Run

We quote machines, not prices on the page — every configuration is priced against your specification — but the operating economics are worth understanding before you compare quotations, because they decide which machine is actually cheaper.

Three cost lines dominate a shear’s life: power, blades and labor. Power follows the installed motor rating and your hours; blades follow your material’s abrasiveness and your feed discipline; labor follows your chamber size and discharge arrangement, because every pre-cut piece is paid for twice — once to cut it, once to handle it. A machine that is cheap to buy and expensive on those three lines is the expensive machine.

The maintenance schedule that keeps the warranty valid is published with the machine — filters, oil, clearances, fastener torque. It is not optional work, and yards that treat it as optional are the ones whose warranty conversation gets short.

When a Shear Is the Wrong Machine

Not every cutting job belongs on a gantry. Small shops processing rebar, short offcuts and light plate are usually better served by an alligator shear — a portable machine that needs no foundation and can even run on a diesel option. If your space rules out foundations, the 250-ton alligator shear deserves a look before you price a gantry.

Yards whose main problem is bulky mixed waste that must be reduced to a small, clean fraction are shredder customers, not shear customers. And if your heaviest material is above the continuous boundary of the class you were considering, the honest answer is the next class up — we will say so on the first call, because the machines that come back to haunt a factory are the oversized and undersized ones, never the right-sized ones.

Scrap Metal Shear Buying FAQ

How do I know which tonnage class I need?

Start from your heaviest weekly material and your shift count, then check the published material boundary for each class. If your heaviest items sit at the top of a class’s continuous range with no margin, move up. The comparison table above is the same data we use on the phone.

Can one shear handle both HMS and non-ferrous?

Yes for mixed steel-dominant feed. Non-ferrous such as aluminum and copper can be cut, but blade choice and chamber configuration should follow the mix you actually run. Send a material list with your inquiry and suitability gets confirmed in writing rather than assumed on both sides.

What power supply do I need?

Machines are built for 380 V, 400 V or 415 V at 50 Hz, or 60 Hz supply to order, and the starting method is matched to your site at quotation. Never wire a machine to a supply it was not built for — it voids the warranty and the first week of production.

How long does delivery take?

Standard builds ship 30 to 45 days after the deposit clears. Non-standard chamber, motor or control combinations run 60 to 75 days, and the exact date is confirmed in writing against the order. The long pole is usually your own foundations and electrical work, not the factory.

What warranty and support come with the machine?

One year on the machine, with the maintenance schedule attached to the purchase order. Every machine ships with leveling instructions, electrical schematics and the hydraulic diagram, and commissioning includes connection, test runs and operator training. Wear parts such as blades and seals are consumables — order the spare kit with the machine, not after the first failure.

Is the range CE certified?

Yes, and the certificate ships with the machine documentation. Tell us your market at quotation if you need additional documentation for import or inspection — it is far easier to prepare alongside the build than to request afterwards.

Talk to the Factory Before You Decide

Send us your heaviest material, your shift pattern and your site supply, and we will recommend the tonnage class and chamber size against real data — including telling you when a smaller machine, or a different machine entirely, is the honest answer. Quotations come back within two business days, factory direct, complete with the specification sheet for your electrician and foundation contractor.

Ready to shortlist? Start at the scrap metal shear range and compare the published specifications against your material list, or send our team the list directly. The FAQ page covers warranty, delivery and commissioning in detail, and the buying guides for balers and shredders cover the other two stages of the line.