Sizing a baler for your yard’s tonnage is not a matter of buying the biggest machine the budget allows. It is matching hourly throughput capacity to your actual material flow — measured at peak, not average — so the press neither bottlenecks the yard nor sits idle for most of the working day. Getting this wrong in either direction costs money: undersizing chokes throughput at the busiest hour of the week, and oversizing pays for capacity and footprint the yard never uses.
Start from peak flow, not average tonnage
Average daily or monthly tonnage is the wrong starting number. A yard that averages 20 tonnes a day but receives half its weekly intake in two peak days needs a machine sized to that peak, not the average — otherwise the baler becomes the bottleneck exactly when the yard is busiest and material is backing up at the gate. Start by mapping tonnage against time: peak hour, peak day, peak week across a full year, including seasonal swings in scrap flow and any predictable surges tied to demolition contracts, fleet disposal cycles, or industrial clients’ production schedules.
A baler sized to your average day will always disappoint you on your busiest day — and the busiest day is when the cost of a bottleneck is highest.
Match machine class to material, then confirm hourly capacity
Throughput figures only mean something once the material class is fixed, because different streams process at different rates on the same machine. Roter RR series balers process 8–14 tonnes per hour of light mixed ferrous and non-ferrous scrap, and the same RR series machines process 15–20 tonnes per hour of end-of-life vehicles. A yard mixing both streams should size around whichever dominates its peak flow, and confirm the secondary stream’s throughput separately rather than assuming it scales the same way. Our decision matrix by material stream goes deeper on matching machine class to what actually crosses your gate.
For yards handling long or oversized material that needs cutting as well as compacting, sizing shifts to shear force rather than throughput alone. Roter shear balers deliver 550 tonnes of cutting force on the RR550.5 and RR550.6, and 715 tonnes on the RR715.6 — the right choice depends on the toughest material regularly entering the yard, not the average piece.
Build in headroom, but price it honestly
Sizing exactly to today’s peak leaves no room for growth, seasonal spikes beyond historical pattern, or a new contract landing unexpectedly. Sizing generously for hypothetical future volume that may never materialise means paying for capacity, footprint, and possibly a higher-tier configuration that sits underused for years. A reasonable approach is to size to documented peak flow plus a modest, evidence-based growth margin — not a round-number guess — and revisit the calculation if the business genuinely scales.
- Map tonnage by hour, day, week, and season for at least twelve months of history where available
- Identify the true peak, not the average, and size hourly capacity to that peak
- Separate material streams and confirm throughput figures per stream, not blended
- Add a documented growth margin tied to actual pipeline, not aspiration
- Confirm the configuration — fixed, semi-mobile, roll-on/off, trailer-mounted — fits the site layout at that capacity
Undersizing and oversizing both show up in the same place: cost per tonne
An undersized baler creates queuing, overtime to clear backlogs, and idle loader time waiting on the press — costs that rarely get attributed back to the machine but land squarely on labour and throughput lines. An oversized baler carries higher upfront capital cost, a larger footprint than the site needs, and in some configurations higher idle energy draw between cycles. Both errors show up in the same metric: cost per tonne processed. Sizing correctly is one of the few decisions in a baler purchase that directly protects that number from day one.
The right-sized baler is invisible in daily operations — it processes peak flow without becoming the story. Both undersizing and oversizing make the machine the story, for different reasons.
When tonnage projections are uncertain
New yards, or yards entering an unfamiliar material stream, often lack the twelve months of throughput history that a confident sizing calculation needs. In that situation, semi-mobile and no-foundation configurations are worth weighing specifically for their flexibility: a machine that can be redeployed or reconfigured as real tonnage data emerges reduces the cost of an early sizing miscalculation, compared with a fixed installation that assumes the yard’s future shape on day one.
Not sure what your peak-hour tonnage actually requires? Bring your material mix and volume pattern to Roter’s technical team — start with the full range here — and get a sizing recommendation built on your gate data, not a generic capacity chart.
FAQs
Should I size a baler to average tonnage or peak tonnage?
Peak tonnage. A machine sized to average daily flow will bottleneck during the busiest periods, which is exactly when the cost of a stoppage or queue is highest. Map peak hour, day, and week across at least a year of history where possible.
What throughput can I expect from a compacting baler versus a shear baler?
Roter RR series balers process 8–14 tonnes per hour of light mixed scrap and 15–20 tonnes per hour of end-of-life vehicles. Shear balers are sized by cutting force instead — 550 tonnes on the RR550.5/RR550.6 and 715 tonnes on the RR715.6 — because their limiting factor is the toughest material, not average throughput.
How much growth headroom should I build into the sizing calculation?
Enough to cover documented, evidence-based growth — a confirmed new contract or a clear historical trend — rather than a round-number guess. Oversizing for hypothetical future volume means paying for capacity and footprint the yard may never use.
What happens if I undersize a baler for my yard?
The machine becomes the bottleneck during peak flow, creating queuing at the gate, overtime to clear backlogs, and idle loader time waiting on the press — costs that typically get misattributed to labour or logistics rather than traced back to machine sizing.
Is a flexible configuration better if I’m unsure of future tonnage?
Semi-mobile and no-foundation configurations reduce the cost of a sizing error, since the machine can be redeployed or reconfigured as real throughput data emerges, unlike a fixed installation committed to one site layout from day one.
