Probat's GT Series Brings Industrial Grinding Into Smaller Footprints
Eighteen hundred kilograms of coffee per hour. That’s nearly two tons of beans transformed into ground coffee every sixty minutes, flowing through a machine that takes up 25% less floor space than its predecessor. Probat’s new GT Series roller mill grinders represent the German manufacturer’s answer to an industry push for efficiency without expansion.
The GT Series, first unveiled at HostMilano in October 2025 and now shipping to production roasters, marks a shift in Probat’s grinding lineup. Where the company’s UW machines used individually driven rolls — reliable but complex to service — the GT models run all rolls from a single belt drive. One belt, simplified maintenance, fewer parts to fail.
How Roller Mills Work
Most coffee drinkers think of grinding as a blade or burr operation, but industrial production operates on a different scale entirely. Roller mills pass coffee through pairs of corrugated steel cylinders spinning at different speeds, gradually reducing particle size across multiple stages. The GT Series uses Probat’s proprietary corrugation patterns across two or three roll pairs, depending on the model.
The result is ground coffee that spans from filter-grind coarseness to espresso-fine particles, with throughput capacities ranging from smaller production needs up to that headline 1,800 kg/hour figure for high-volume operations.
The Space Problem
Floor space in a production facility costs money. Every square meter dedicated to equipment is a square meter not available for storage, staging, or additional capacity. Probat’s Julian Jansen, product manager for the GT line, describes the series as “the new standard” and “the entry to the Probat grinding portfolio” — but entry-level in the industrial context still means significant footprint.
The GT 300.3 model comes in 15% shorter than its UW 300.3 equivalent, requiring 25% less total floor space. For a roaster planning a facility layout, those percentages translate to real dollars in rent, construction, or opportunity cost.
Simpler Service
The single-belt drive system addresses a persistent industrial headache: downtime. When each roll runs on its own drive mechanism, a failure in any one motor or belt means pulling the machine offline. The GT’s unified drive doesn’t eliminate maintenance needs, but it reduces the number of potential failure points.
Probat also redesigned the dosing mechanism, eliminating the slide gate that regulated coffee flow in earlier machines. The new system manages throughput without the mechanical complexity of a sliding component — one less thing to jam, adjust, or replace.
The Lineup Shift
The GT Series doesn’t entirely replace Probat’s existing options. GT 600 models step into the role previously filled by the UW 500 series, while UW 300 grinders remain available for specialty fineness ranges that the GT line doesn’t cover. It’s a parallel product offering rather than a straight replacement.
For roasters evaluating industrial grinding equipment, the calculus involves throughput needs, available space, maintenance capabilities, and budget. The GT Series adds another option to that equation — one that trades some of the UW line’s flexibility for reduced footprint and simplified mechanics.
Why This Matters
The coffee most people drink doesn’t come from a café grinder. Grocery store bags, office break room supplies, and the beans that stock food service operations all flow through industrial equipment like the GT Series. Improvements at this scale ripple outward: more efficient production can mean more competitive pricing, which can mean more accessible specialty-grade coffee in places that previously couldn’t justify the cost.
Probat has built roasting and grinding equipment since 1868. The company’s machines process a significant portion of the world’s coffee, even if most drinkers never see them. The GT Series is the kind of infrastructure update that happens far upstream from the cup, invisible to consumers but meaningful to the roasters who keep the supply chain moving.