drum roasters
italian roasting engineering since 1919, shop to industrial.
ferrara, italyfounded 1919visit petroncini
Petroncini has been building drum roasters in Ferrara, Italy since 1919. by the 1930s, roughly 80% of italian roasters were using their machines, which built a reputation around forged cast iron construction and consistent heat transfer. the company became part of IMA Group and still manufactures both small-batch specialty machines and large industrial roasters up to 120 kg. their drums use cast iron flywheels and ferritic steel walls, materials chosen for thermal stability rather than cost savings. the TT series focuses on manual control with profile logging, giving experienced roasters direct influence over convection and conduction balance through adjustable heat, airflow, and drum speed. the TMR line adds full automation for production roasting. Petroncini machines appeal to roasters who want heavy-duty construction and the ability to shape thermal curves without fighting the equipment. they're not entry-level machines, and the control philosophy assumes you already know what you're trying to do with a roast profile. expect these to show up in established specialty shops and mid-size production facilities where longevity and repeatability matter more than touchscreen interfaces.
the flywheels are cast iron instead of lighter alloys, which keeps rotational momentum stable as temperatures swing during a roast. the drum walls use ferritic steel rather than stainless, a choice that favors conduction consistency over corrosion resistance in low-moisture environments. Petroncini also runs independent suction systems for roasting and cooling, so you can drop a batch into the cooling tray and start the next roast immediately without sharing airflow between the two phases. this matters more as batch size increases and cooling time starts eating into your hourly throughput.
yes, but you need to understand how to manipulate conduction and convection independently. the TT models let you adjust burner intensity, airflow volume, and drum rotation speed separately, which gives you enough control to stretch development time without baking if you're chasing floral or fruit-forward profiles. the cast iron retains heat aggressively, so lighter roasts require more attention to charge temperature and early-phase airflow than you'd need on a more convection-dominant machine. roasters coming from fluid beds or perforated drums usually need a few weeks to recalibrate their approach.
the TMR 120 makes sense if you're running repeatable production recipes and need consistent output without constant operator intervention. full automation handles profile execution once you've dialed in your curves, which reduces labor cost per kilogram and minimizes batch-to-batch drift across shifts. the TT models with profile logging still require manual adjustments during the roast, which gives you more control but demands more skill and attention. if you're a contract roaster running the same five profiles at volume, the TMR pays for itself. if you're a specialty roaster constantly tweaking or running single-origin microlots, the TT flexibility is worth the hands-on time.
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