No DramaBuyer guide · Pharma & supplements
Two rotary presses with the same model code can make very different tablets, because hardness, weight spread and capping depend on frame, tooling steel and pre-compression, and none of these show on a quotation.
01
On one frame, more stations means smaller dies: one listing offered 23, 25 and 27 stations with the largest tablet falling from 45 mm to 30 mm. Price the station count your tablet diameter allows, not the biggest output.
A pre-compression roller lets air leave the powder before the main hit. Without it, many blends cap at speed. Ask for both forces in kN and whether each is set by handwheel or by servo with a recorded value.
Punches are the wear part. Ask the standard (EU or TSM), type (B, BB or D), steel and hardness. If the tooling is the factory's own pattern, every replacement set comes back to that factory.
A double-sided press makes two tablets per punch per turn, doubling the output figure on the same station count. It also means two sides to keep at equal weight.
A basic press holds weight through cam settings and an operator with a balance. Better builds measure force on every tablet and reject outliers. This is the biggest price driver under one model code.
Powder reaching cams and bearings shortens their life. Check the turret is sealed from the drive, doors are interlocked, and the turret comes out for cleaning without major dismantling.
Ask the gearbox and motor brand, how punches are lubricated, and whether oil can reach tablets.
02
Chinese rotary presses are usually sold as ZP plus a number. The number is the station count: punch pairs on the turret. A trailing letter often names the punch type; confirm it, because usage varies. The code does not state output, so compute it: stations x rpm x 60 x compression points per turn.
03
Send these with the enquiry. Without them, any number a factory gives you is a guess dressed as a quotation.
04
| Require this | A pass looks like |
|---|---|
| Run your own blend, or a placebo with the same flow, at the turret speed you are buying. Fix sample size and interval in the FAT protocol beforehand. | Every weight sample stays inside your tolerance, and the spread does not widen between first and last sample. |
| Measure hardness and friability on the same samples and check for capping. | Hardness inside specification in every sample, and no capped or laminated tablet. |
| If you pay for force monitoring, change the fill depth to force underweight tablets. | The press rejects them automatically and logs the event. |
| Remove and refit the turret tooling while you watch. | Your operator could do it from the manual, and the time is written into the FAT record. |
05
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A press will not fix the formulation. Granulate first with a high-shear mixer granulator, or fill the dose into hard capsules.
A single-punch or small lab rotary press, which wastes less powder per setting change.
Compare a used European press with its qualification history. It can beat a new press whose controls you must qualify from nothing.
07
We name the kind of source, how many and when, and never the factory. Listed prices are asking prices, not landed cost. Where we do not hold a fact we say so: that is a GAP, not an estimate.
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Every machine we source in this area is on the Pharma & supplements page. How a project runs, stage by stage, is on how it works, and what it costs is on pricing.
Straight answers
The frame principle is the same. The difference is per-tablet force measurement, automatic reject, audit trail and tooling precision. For a supplement, a well-built Chinese press with standard tooling can be enough. For a licensed medicine, qualification often decides, and a used European press can win.
Station count and punch type against the order, punch and die hardness certificates, guard interlocks, pre-compression working, weight and hardness samples from your blend, turret removal timed, serial number matching the declaration.
Whether they make turret and tooling in house, how they check punch hardness, and whether they can show a press running powder.
An EU Declaration of Conformity under the Machinery Directive 2006/42/EC for delivery up to 19 January 2027, and under the Machinery Regulation (EU) 2023/1230 from 20 January 2027. A CE mark on a brochure proves nothing; check the declaration and technical file before paying the balance.
The company placing the press on the EU market. It puts its name and address on the machine or documents and checks the conformity documentation. If you import directly, that is you.
Supplements are food law, with contact parts under Regulation (EC) 1935/2004. A licensed medicine maker also needs EU GMP qualification records. The CE mark covers neither.
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