It does not prove bad faith
A listing may be quoting a smaller block, an optimistic cycle, or copying a number from elsewhere. The useful response is to ask for the real operating rate in writing, not to walk away.
No DramaChinaIndustrial sourcingContact
Claim review 01 · 21 August 2026
8,000 in eight hours.
The machine says 7,680.
This is not an accusation. It is arithmetic any buyer can repeat, on a number that appears in published listings for one of the most quoted machines in the category.
The working
Four blocks a press.
Fifteen seconds a press.
A QT4-15 forms four standard 400 × 200 × 200 mm blocks per mould cycle, at a stated cycle of 15 to 20 seconds. Four blocks every fifteen seconds is 960 an hour, and 7,680 across an eight hour shift.
That ceiling assumes the machine never stops. No pallet change, no mix batching, no shift break, no fault. A working line runs at roughly 70 to 85 per cent of it.
So the published figure is not merely optimistic. It is above the number the machine could reach if it never stopped for anything, all day.
Claim review 01QT4-15
4×3,600÷15
Physical ceiling, per hour960
Ceiling across 8 hours7,680
Published claim 8,000 / 8 hrsAbove the ceiling
Realistic net, 70-85%5,360-6,530
What this does and does not prove
The limits of the finding, stated.
+
Block size changes everything
Every figure here assumes the 400 × 200 × 200 mm standard block. A 400 × 100 × 200 block roughly doubles the count, and a listing that does not say which it means is not comparable to one that does.
A separate listing claims 2,880 an hour
For the same model code. That is three times the ceiling. Presumably a smaller unit, unstated.
What we could not verify
We did not obtain a timed production run from any factory. The ceiling is arithmetic from published specifications; the 70-85 per cent net figure is an industry rule of thumb, not a measurement we took.
What to do with it
Three questions worth putting in writing.
Which block is that figure for?
Dimensions, in millimetres. Without them the number means nothing.
What is the real cycle time, loaded?
Not the catalogue figure. The one their own line achieves with a full mould.
Will you warrant an output rate?
A performance clause on commissioning. The answer tells you more than the number did.
Sources20.08.26
Cycle time and blocks per mould cross-checked against multiple manufacturer specification tables
Vendor namedNo
The arithmetic is the point, and the same figure appears in more than one listing
Measured by usNo
No timed production run was obtained. This is arithmetic from published specifications
Every figure on this page carries the date it was checked. Where we did not measure something ourselves, we say so.
Start with the machine
Send us a quote and we will do this to it.
Free, and we tell you the answer whether or not it leads to work. If the numbers hold up we will say that too.