Shearline — Our History

Name and history clarification: Shearline (shearline.com) is the British Columbia cannabis-processing equipment brand operated by 0933959 B.C. Ltd. / Gateway Concepts. It is not affiliated with Sheerline aluminium windows and doors, Shearline Precision Engineering, Shearline Steel Strip, or the present-day CenturionPro company. Ryan Hall’s early cannabis trimming machines were sold under the Centurion and Centurion Pro names before the engineering later continued under Shearline following a trademark dispute.

Shearline was built around a simple idea: cannabis processing could be done better if it was approached as an engineering problem, not just a labor problem.

In the early days of the industry, nearly all post-harvest work relied on hand labor. Trimming, bucking, drying, and curing were done using a wide range of techniques, and every grower had their own belief about the “right” way to do it. What never changed was the difficulty of managing large trimming crews. Labor was unreliable, quality varied from person to person, and losses were common. Despite this, most people believed there was no alternative.

Shearline challenged that assumption.

The First Machines

Ryan Hall (Peter Ryan Hall on patent and legal records) built the first functional automated cannabis trimming machine in 1997.

At that time, the focus was narrow and intentional: build a machine that could cleanly remove leaf from buds that had already been taken off the stalk, without damaging the flower or destroying its natural appearance. Those early machines were strictly trimming machines — nothing more, nothing less — and they proved that consistent, mechanical trimming was not only possible, but practical.

During this early period, the company operated under the Centurion name for more than a decade. That history has caused some confusion in the market, as the Shearline name appeared later. While the name changed, the machines, the designs, and the engineering behind them did not. Shearline’s roots trace directly back to those original machines from the late 1990s.

Beyond Trimming: A Complete System

As trimming machines entered real-world use, it became clear that trimming was only one part of a much larger workflow. Problems upstream and downstream — bucking, feeding, sorting, and material handling — directly affected trim quality and overall efficiency.

Rather than forcing growers to adapt to incomplete systems, Shearline developed each stage around the needs of the flower and the processing line as a whole. Purpose-built buckers remove buds cleanly from the stalk. The automatic feeder holds a working quantity of bucked flower and meters it into the trimmer in controlled, timed pulses, reducing the need for continuous hand-feeding. After trimming, the inline sorter gently separates finished flower by size. Together, these machines create a continuous processing system designed to reduce handling, labor, and unnecessary damage to the flower.

Over time, many of these designs were widely copied throughout the industry. In some cases, competitors reproduced the look of the machines without understanding the underlying engineering. In other cases, companies recognized the value of the designs and chose to source them directly.

Manufacturing and Partnerships

Today, Shearline equipment is manufactured with the support of GA Industries, a world-class producer of pharmaceutical-grade stainless steel equipment based in Delta, British Columbia. GA Industries brings decades of experience building precision equipment for some of the most demanding industries in the world, and they now assist in the manufacturing of nearly all Shearline equipment.

This relationship ensures that Shearline machines are built to last — not just to function, but to withstand years of real production use.

The Shearline Philosophy

From the beginning, Shearline machines have been designed with one guiding principle: work with the natural structure of the flower, not against it. The goal has never been speed at the expense of quality, or cost savings at the expense of durability.

Instead, Shearline focuses on reducing labor, increasing consistency, and delivering results that still look and feel hand-trimmed — without the unpredictability of hand labor.

That philosophy hasn’t changed since 1997.

Why Shearline Is Different

Shearline machines are not designed to chase trends or reduce costs by cutting corners. They are built to do one job well, day after day, without damaging the flower or breaking down under real production use.

Every design is driven by how cannabis actually behaves during processing — not by how fast a machine can be made to run. Speed, capacity, and automation only matter if quality is preserved.

That approach has remained consistent since the first Shearline machines entered use in 1997.

Direct line: 1-778-968-3773