630 Ton Scrap Metal Shear: The HMS Watershed
Somewhere between 500 and 800 tons of shearing force, a scrap operation stops being a yard with a big machine and becomes a heavy-processing plant. The boundary is not the tonnage on the badge — it is a specific material: HMS 1 & 2 as a daily diet rather than a weekly exception. The Q91-630 is where our range begins taking that duty seriously, and this article explains what the watershed means, what changes in the build at this class, and why buyers whose intake is dominated by heavy HMS are quoted this machine rather than the class below it.
If you are still sizing the decision from scratch, the general buying guide covers the framework; this piece is about the class where the framework’s central question — what is your heaviest routine material — starts returning a different answer.
The Published Figures for the Class
| Specification | Q91-630 |
|---|---|
| Rated force | 630 ton |
| Typical output | 60–80 tons per day |
| Continuous cutting | 60 mm plate |
| Occasional cutting | 80 mm plate |
| Duty | Continuous HMS, two-shift and heavier |
Read the duty row first. “Continuous HMS” is the whole identity of this class: the machine is built around heavy melting steel arriving as a routine diet, not as an occasional punishment. Everything else on the sheet — the force rating, the output band, the plate boundaries — follows from that identity. A buyer quoting this class against light mixed feed is buying capacity the operation cannot feed; a buyer quoting the class below against continuous HMS is buying a machine that will fight its material every shift.
Why the 500 Is Not an HMS Machine
The Q91-500 is the demolition class: 50 mm continuous, 65 mm occasional, built for feed that arrives dirty, adhered and irregular. That is a different job from continuous HMS, and the difference is not a small step in force. HMS is dense, uniform and heavy — it loads the blade and the frame differently than demolition material, and it does it all shift long. A 500 takes heavy HMS occasionally; a yard that runs it on HMS every day gets half the published blade life and a hydraulic system that runs hot.
The 630 closes that gap with a build specified for the duty: frame and hydraulics rated for sustained heavy cutting rather than occasional heavy bites, blade configuration and hold-down matched to dense material, and a duty conversation at quotation that assumes two shifts or more. That is what “watershed” means in practice — not a bigger number, but a different specification basis.
What Changes in the Build
Buyers stepping up from the demolition class notice three changes, and only one of them is on the specification sheet.
The hydraulic package. Sustained heavy duty demands stable pressure through the shift rather than peak pressure in bursts. The pump station, reservoir and cooling are specified around continuous cycles at heavy load, which is why oil temperature and cleanliness become operational concerns rather than maintenance trivia at this class.
The wear strategy. Blades, hold-down inserts and wear liners at this duty are planned consumables with a rotation schedule, not emergency replacements. The blade specification — tool steel hardened for abrasive ferrous scrap, four-sided reversible heads — delivers its published life inside that schedule, and the yards that run this class well treat blade rotation as a production-line activity with a maintenance window rather than a tool change.
The duty declaration. A 630 quoted for two shifts on continuous HMS is a different build than one quoted for one, and the difference is invisible on a price sheet and obvious in year three. The shift pattern you declare at quotation is the specification the machine is built against.
The Two-Shift Rhythm
Continuous HMS is a rhythm rather than a burst, and the operation around the machine has to find the beat. Charge consistently rather than in surges — dense material fed in surges starves the cycle and overloads the discharge. Rotate blade edges on the tonnage schedule rather than on failure, because a failure at this duty costs a shift, not an hour. Keep the discharge clearing at the rate the box delivers, because heavy cut pieces accumulate faster than light ones and the pile becomes the bottleneck before the machine does.
The yards that run this class well treat the machine like a production line with a maintenance window. That discipline is most of the difference between the published 60 to 80 tons per day and the numbers buyers report when the rhythm slips — and none of it is visible in the purchase price.
Where the Class Sits in the Range
| Class | Output band | Continuous / occasional | The operation it fits |
|---|---|---|---|
| Q91-500 | 45–60 t/day | 50 mm / 65 mm | Demolition feed, adhered sections |
| Q91-630 | 60–80 t/day | 60 mm / 80 mm | Continuous HMS 1 & 2 |
| Q91-1000 | 100–120 t/day | 100 mm / 130 mm | Mill-grade, heavy plate |
| Q91-1250 | 160–200 t/day | 120 mm / 150 mm | Heavy-plate production lines |
Above this class the range moves into mill territory: the 1000 takes heavy plate at 100 mm continuous and pairs with balers in plant lines, and the 1250 becomes a production machine judged on cut consistency. The step from the 630 to the 1000 is the step from heavy yard to plant — a different operation, not a bigger one. The full range maps every step from 200 to 2000 ton.
What the Quotation Should Pin Down
Four inputs decide whether the 630 that arrives is the watershed machine your intake needs:
- The material list. The proportion of HMS 1 & 2 in a normal week, the heaviest routine sections, and whether plate appears in the 60 mm band. The blade configuration, hold-down specification and steel grade recommendation all follow this list.
- The shift pattern. Two shifts or three, declared honestly. This is the row that changes the build.
- The discharge plan. Where 60 to 80 tons a day of cut heavy material goes, and how it leaves the yard. At this tonnage the pile under the box is the most common self-inflicted bottleneck.
- The supply. Voltage, frequency, spare kilowatts and the starting method — confirmed with your electrician before the build, because motor ratings at this class commonly exceed what a smaller yard’s supply can start cleanly.
Send those four with your inquiry and the written quotation comes back within two business days, factory direct, with the specification sheet your electrician and foundation contractor can work from. If your numbers say the class above, the quotation will say so.
The Blade Log at Heavy Duty
At continuous-HMS duty the blade log stops being optional. The rotation interval is set against tonnage and material rather than against the calendar, and the only way to know the interval has arrived is to have written down when the last one happened. Log every rotation with the tonnage and the dominant material of the period; three months of that log tells you more about your wear than any supplier’s average figure, because it is your material, your feed and your discipline producing the number.
The log also catches the silent changes. A new supplier with dirtier intake, a seasonal shift in material mix, a crew change that altered the charging habit — all of them show up in the log as shortening intervals before they show up in the wear bill. The yard that keeps the log adjusts; the yard that does not discovers the change at the blade purchase.
The Duty Conversation, Written Down
The duty declaration at this class is a document, not a conversation topic. Two shifts or three, on the material mix you actually run, written into the quotation because the build follows it — frame, hydraulics, cooling and wear strategy all keyed to the declared duty. The operations that declare honestly get machines that disappear into the production plan; the operations that declare aspirationally get machines that fight them in year two. The quotation is where that sentence becomes a specification, and it is the last cheap moment to change it.
Buyer FAQ
Is the 630 the right class for continuous HMS?
Yes — continuous HMS 1 & 2 is the duty this class is built around, at 60 to 80 tons per day with continuous cutting at 60 mm. Below it the machines take heavy HMS occasionally; above it the range moves into mill plate territory.
What is the 630’s daily capacity?
60 to 80 tons per day, with the position inside the band set by material density, loading efficiency and running hours. The configuration is sized against your actual feed.
How does the build differ from the 500?
The hydraulic package, wear strategy and duty basis. The 500 is quoted for demolition feed with occasional heavy bites; the 630 is specified for sustained heavy duty with a maintenance window planned around production.
What plate thickness does it handle?
60 mm as a continuous daily diet, reaching 80 mm occasionally. Routine plate past 80 mm points at the 1000-ton class.
What support comes with the machine?
CE and ISO 9001 certification, factory load testing before shipment, a one-year warranty with extended main-frame coverage available per order, and spare blades shipped within 48 hours by DHL or FedEx. Remote commissioning support and operator training come as standard, with on-site service quotable where the site requires it.