Dough Mixers

Work from flour weight per batch, not brochure litres, because a mixer's litre rating overstates usable dough capacity. A spiral rated at 130 litres typically handles around 80kg of finished bread dough. Match batch size to your oven and make-up capacity so dough never waits over-fermenting, and remember minimum batch limits too, since most spirals mix poorly below about 10 percent of capacity.

Run it in both speeds and listen to the gearbox under load if possible, since whining or knocking points to expensive transmission wear. Check the bowl for cracks and rim wear, the hook or tools for play in their mounts, and belts for glazing. On removable-bowl machines, test the bowl locking and drive engagement several times. Ask for maintenance records and confirm guard interlocks stop the machine properly.

Yes, mechanical energy converts directly to heat, and intensive mixing can add several degrees to a dough in minutes. That is why spiral mixers with twin speeds develop on high briefly and why industrial horizontal mixers run jacketed troughs with chilled water. If your process is temperature-sensitive, ask sellers about jacket condition, typical temperature rise per batch, and whether the machine ran chilled water previously.

Small planetaries up to around 20 or 30 litres are often available single-phase, but virtually everything above that, and all spirals of meaningful capacity, run three-phase motors. Check your supply capacity before committing, because larger mixers can draw substantial starting current. Listings state voltage and phase, and sellers can confirm the exact motor plate details if your site supply is marginal.

In many cases yes, and it is worth asking every time. Sellers who still have machines installed will often demonstrate under power, and some will mix a wet batch so you can watch development and listen to the drivetrain working. Where a demonstration is impractical, request video with sound of a full cycle. The direct contact model exists precisely so you can arrange this without an intermediary slowing it down.