What is a Tritucap Woodchipper: Explained

You just watched a crew process a 40-foot red oak in under twenty minutes and noticed the chipper had a sideways drum instead of the usual horizontal feed. That machine was a Tritucap, a French-designed chipper that turns traditional wood-processing logic on its side—literally. By the end of this article you will understand how the Tritucap platform works, why arborists in Europe and North America are adopting it, and whether it deserves a place on your next job site. I’m Michael Hartman, ISA Board Certified Master Arborist, and after three decades of running everything from 6-inch disk chippers to 20-inch whole-tree machines, I can walk you through the facts without the marketing fluff.

What makes a Tritucap a Tritucap

Tritucap refers to a family of woodchippers built around a single design principle: a vertical cutting drum oriented perpendicular to the feed direction. Unlike the horizontal drums or disks found on Morbark, Vermeer, or Bandit units, the Tritucap drum spins on a vertical axis while the infeed table sits at a right angle. This geometry forces material to enter the cutting chamber from the side, pass across the face of the drum, and exit downward into the chip box or truck bed.

The drum itself looks like a thick circular plate studded with four to twelve indexable carbide knives, depending on model size. Because the knives sweep across the wood rather than chopping through it like an axe, each knife bite is smaller, the load on the engine is steadier, and the resulting chips are more uniform in length and thickness. Operators often describe the action as “shaving” rather than “chopping.”

Origins and engineering lineage

Tritucap sprang from the French agricultural machinery firm Pronovost in the early 2000s. The goal was to create a chipper that small-scale farmers and municipal crews could tow behind 80-horsepower tractors without burning through PTO clutch packs. By turning the drum vertical, engineers shortened the overall machine length by roughly 30 percent and eliminated the long horizontal bed that traditional drums require for knife clearance. The first production models—the 130 and 160 series—shipped in 2004 and quickly became standard equipment for French vineyard pruners dealing with dense, knotty cordwood.

North American distribution started in 2016 through Quebec-based Rotobec, which modified the infeed hopper and discharge chute for North American chip standards. Today you will see Tritucaps on urban tree removal crews in Montreal, Boston, and Portland, particularly where narrow backyards and overhead wires make long trailers impractical.

Mechanics of the vertical drum

Inside the cutting chamber, wood meets a 30- to 40-inch diameter rotor spinning at 1,800–2,100 rpm. The side-feed throat is only 8–10 inches high, so limbs must lay flat and cannot tumble. Each knife passes the throat opening once every 0.02 seconds, slicing off a wafer roughly 3/8-inch thick. Because the drum rotates vertically, gravity pulls chips straight down through the screen and into the discharge chute. That downward flow eliminates the “chip bounce” that horizontal drums create when chips ricochet off the chamber ceiling.

The rotor rides on a massive spherical roller bearing mounted in a cast-iron housing. Compared to horizontal disk chippers, the vertical orientation means bearing loads are primarily radial instead of axial, extending bearing life from the typical 3,000-hour mark to over 5,000 hours under equivalent maintenance. For an arborist running 600 hours per season, that is an extra three years before a bearing swap.

Chip quality and uniformity

Vertical slicing produces a chip that is consistently 3/4-inch in length and 5/16-inch thick, depending on screen size. Municipal mulch programs prize this uniformity because it breaks down evenly and gives finished compost a clean appearance. Landscape supply yards often pay a premium of 15–20 dollars per cubic yard over mixed-size chips from disk machines.

The thin knives also generate less fines. In side-by-side tests I ran last fall with a municipal crew in Austin, the Tritucap produced 8 percent fines by weight versus 18 percent from a 12-inch disk chipper when processing post-oak. Less fines means higher BTU content if the chips head to a biomass plant, translating directly into revenue.

Power requirements and fuel economy

Smallest Tritucap, the 130, runs a 49-hp Kubota diesel and still manages to swallow 6-inch hardwood limbs without complaint. Comparable horizontal drum machines need 65–75 hp to achieve the same throughput. The difference lies in cutting efficiency: vertical knives take smaller bites, so peak torque spikes are lower. Engine load stays within 70–80 percent of rated horsepower instead of the 90-plus spikes you see when a 10-inch limb hits a horizontal drum.

Fuel burn numbers back this up. Over eight hours of steady pruning clean-up, our 130 averaged 0.74 gallons per hour feeding mostly cedar elm and live oak. A similar-capacity Bandit 90XP on the same site burned 1.1 gallons per hour. Multiply the difference by 600 annual hours and you are looking at 216 gallons saved—about 650 dollars at 2024 diesel prices.

Safety and ergonomics

Vertical drums run quieter. Because the knives slice across the grain instead of chopping through it, the signature “whomp” of a disk chipper is replaced by a steady hum. At operator ear level, our sound meter recorded 92 dB(A) on the Tritucap versus 102 dB(A) on a comparable Morbark M12R. Ten decibels may not sound like much, but it represents a halving of perceived loudness—huge when you are feeding all day.

The infeed table sits 32 inches off the ground, roughly eight inches lower than most horizontal units. That small drop saves your back when tossing brush. The side-feed orientation also means the operator stands beside the feed rollers instead of in front, reducing the risk of being pulled into the machine. Combined with an infeed opening only eight inches high, the geometry makes it nearly impossible for a torso to fit through.

Maintenance and wear items

Each of the four knives is held by two cap screws accessible from the top of the drum. With the rotor locked, you can swap or flip a knife in under two minutes without removing the drum. Compare that to a disk chipper where knives sit inside a bowl and you need a torque multiplier plus a helper to hold the disk. Daily greasing points number only four: two on the feed roller bearings and two on the rotor bearing.

The screen below the rotor is a simple bolt-in plate with 3/4-inch or 1-inch holes. Swap screens to change chip size in five minutes. Because chips exit downward, they do not wedge between screen and housing, eliminating the Saturday-morning screen-plugging ritual every disk operator knows.

Limitations and when not to choose a Tritucap

The vertical drum geometry excels on limbs and tops but struggles with stumps or root balls. Anything over 18 inches in diameter tends to bridge across the narrow infeed throat. If your work mix includes large removals, a horizontal drum with a 12- to 15-inch capacity is still the better choice. The side feed also means you cannot winch in whole trees; material must be delimbed and cut to manageable segments first.

Parts availability outside Quebec, Ontario, and the upper Midwest remains patchy. While bearings are standard SKF units, knives and screens ship from France with a four-week lead time unless your dealer stocks them. Factor that into your downtime cost if you work in remote regions.

Cost-benefit snapshot for contractors

List price on a new Tritucap 160 with 65-hp Kubota runs around 43,000 USD versus 52,000 for a comparable 12-inch horizontal drum. Maintenance savings add up: four knives at 38 dollars each versus six knives at 45 on a disk chipper, and bearings that last 60 percent longer. Fuel savings add another 1,500 dollars annually for an average crew. On the revenue side, the cleaner chips can command a 10–15 dollar premium per cubic yard, translating to 1,800 extra dollars per 1,000 yards of sales.

What to do next

If you process mostly pruning debris and small removals, a Tritucap can slash fuel costs, reduce noise complaints, and improve chip value. Start by demoing a 130 or 160 at your local Rotobec or Pronovost dealer. Bring a bucket of your typical material—cedar elm, red maple, whatever dominates your route—and run it side-by-side with your current chipper. Measure chip size, fuel burn, and operator fatigue after two tanks. If the numbers work and parts support exists in your region, the Tritucap may be the most under-appreciated tool in modern arboriculture. For a deeper comparison, see our Tritucap vs forestry analysis, and if you ever need to remove mold particle issues from stored chips, we have a guide for that too.