What size trees can an excavator mulcher handle?

A properly matched head processes brush and small stems in continuous passes and larger individual trees by working them down progressively — top-down with the reach an excavator uniquely offers. Practical productivity depends more on hydraulic flow, tooth condition and technique than on any single 'max diameter' number. In mixed vegetation management, the excavator's selectivity is worth more than raw stem capacity.

Fixed carbide teeth or swinging knives — which rotor?

Fixed carbide teeth are the default for real-world land clearing: they tolerate stone and soil contact, need less balancing attention, and grind stumps at grade. Swinging knife or hammer rotors cut cleaner and faster in stone-free plantation work. If your sites include rocky ground, ditch lines or soil contact, carbide is the economical answer.

Mulching versus clearing and burning — what's the case?

Mulching finishes the job in one operation: vegetation becomes a mulch layer that suppresses regrowth and prevents erosion, with no burn permits, no smoke risk, no windrows to rehandle and no haul-off. Clearing with dozers and burning can be cheaper per hectare on huge greenfield tracts, but for corridors, fire mitigation, selective clearing and anywhere near people — mulching wins operationally and environmentally.

Hydraulic Attachments — Mulcher

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Hydraulic Attachments — 2–30 Ton Excavators

VANROCK
Mulcher

The VANROCK Mulcher is a professional hydraulic attachment suitable for various outdoor operation needs. With powerful shredding performance it processes all types of vegetation waste, combining efficient operation with environmental benefits — widely used in vegetation management, site preparation, ecological restoration and other scenarios.

Applications

Forest MaintenanceMaintaining Landscaping and Agricultural AreasUrban Job SiteRoad WorksInert Material Recycling

MU — Series / 4 Models

Multiple tooth types

Choose the right teeth for every vegetation and ground condition.

No case drain line

Simple hydraulic hook-up — no extra drain line required.

Cutting limiter

Designed with a cutting limiter for controlled material intake.

Options that work

Optional hydraulic front hood and thumb, removable slide plate.

The Series

VANROCK mulcher series

Four models covering carriers from 2 to 30 tons — powerful shredding for forest clearing, site development and vegetation management.

Units

VR-MU 20

Excavator2–5 Ton

Carrier

2–5 Ton

Rated power

22 kW

Weight

230 kg

Rec. pressure

180–250 bar

Back pressure

≤20 bar

Rec. flow

30–60 LPM

Rated speed

1875–3750 RPM

Rated torque

64 Nm

Shaft diameter

310 mm

Cutting length

800 mm

Size

1350×500×650 mm

Blades

14 pcs

Engineering

Where the VANROCK mulcher works

Five applications where powerful shredding pays off.

Shred residual branches, dead wood and pruned branches to reduce accumulation and convert them into organic mulch.

Know-how

Forestry mulcher know-how

How an excavator mulcher works

A forestry mulcher spins a toothed rotor at high speed, shredding standing vegetation, brush and trees into mulch in a single pass. On an excavator, the mulcher goes to the work — up slopes, over ditches and into stands a ground machine can't enter.

Rotor and teeth define the character: fixed carbide teeth grind and tolerate soil and stone contact; swinging hammer/knife rotors cut faster in clean wood.
Flow is production: mulching heads are the hungriest hydraulic attachments — sustained auxiliary flow keeps rotor speed up in the cut.
The excavator advantage: reach lets you process material from one setup position, selectively removing stems while leaving keep-trees untouched.
The mulch layer left behind suppresses regrowth, protects soil from erosion and eliminates haul-off entirely.

Choosing the right mulcher

Size the head to the carrier's hydraulics first — the rotor you can keep spinning matters more than the widest head on the brochure.

Hydraulic reality check: match the head's flow demand to your machine's actual sustained auxiliary output, not its peak rating.
Working width vs stem size: a narrower head with high tip speed processes large stems better than a wide head running slow.
Tooth type: carbide fixed teeth for rocky ground and soil contact; knives for clean plantations where finish and speed matter.
Carrier stability: mulching at full reach with a running rotor tests the machine's stability — check the head's weight against reach charts.
Guarding and protection: specify carrier guarding (cab, hoses, belly) for forestry duty — it's part of the system, not an accessory.

Where excavator mulchers earn their keep

One machine clears, processes and leaves the site finished — no chainsaw crews, no burn piles, no chipping and trucking.

Right-of-way maintenance: powerlines, pipelines, roads and rail corridors kept clear on a maintenance cycle.
Land clearing: converting scrub and forest regrowth into ready-to-work ground in one pass.
Fire-break and fuel-load reduction: mechanized vegetation management on slopes too steep or remote for ground rigs.
Invasive species control: selective removal with immediate on-site processing of the cut material.

FAQ

Mulcher FAQ

The deciding number is sustained auxiliary hydraulic flow — mulchers convert flow into rotor speed, and rotor speed is production. Check your machine's continuous (not peak) flow and pressure against the head's requirement, then confirm the head's weight is comfortable at your typical working reach. VANROCK dealers match head to machine model before quoting, including the guarding package forestry work demands.

Can't find the ideal mulcher for your application?

We provide custom solutions to all our customers and offer mulchers that you can take advantage of.

VANROCKMulcher