Trevi Benne WR10 tree shear

The WR10 is where the heavy Trevi Benne architecture becomes available to the 12 to 16 tonne excavators that road, rail and mixed civil contractors float most often. The sizing on this page is indicative and comes from regional dealer literature rather than a factory per-model sheet; the factory publishes the WR family as three models spanning 1,250 to 2,225 kg, 11 to 35 tonne carriers and roughly 400 to 550 mm trunk capacity.

Where the WR10 sits in the range

The WR10 is the entry point to the WR family. Its siblings are the WR15, indicatively for 17 to 22 tonne carriers with a nominal 500 mm cut, and the WR20 for 23 to 30 tonne machines at around 550 mm. Below it, the largest model of the WL Series reaches into the same carrier band with a lighter head and an accumulator. The WR10 therefore competes with the top WL rather than its own family: a 14 tonne machine that mostly sees regrowth belongs on the WL, one that repeatedly fells 300 to 400 mm hardwood beside roads and rail belongs here. The tree shear buying guide covers the range as a whole.

What the published figures mean on site

The nominal 400 mm figure is a cutting class, not a promise about eucalypt. It says the twin-blade system can be driven through stems of that order under suitable conditions; it does not say how long a dense 400 mm butt takes or how often the head should do it. Plan production around the stem sizes that make up most of the site and treat the 400 mm class as headroom (the maximum diameter versus production diameter guide explains the sampling). The twin-blade architecture is the reason to pay for a WR rather than a single-blade head of similar rating: two Hardox blades penetrating from both sides shorten the travel each blade needs, reduce fibre crushing and give a cleaner face on merchantable timber. Since the WR10 is the lightest of a family that starts at 1,250 kg, expect a configured head with rotation and bracket to sit well above that base, and get the exact number in writing.

Carrier matching

A 12 to 16 tonne band is a starting point only. A WR10 holds the tree it has just cut, so the useful figure is the over-side lift-chart value at the working radius minus head, rotator, bracket and hitch. As an illustration only, assume a 14 tonne excavator rated at 2,600 kg over the side at six metres and a configured attachment of 1,500 kg: 1,100 kg remains for the stem, which is comfortably a 250 mm hardwood tree of moderate height and not comfortably a 400 mm one. That arithmetic decides whether the 400 mm capacity is ever usable at reach; the lift chart and attachment mass guide shows how to read the chart. On hydraulics, the WR10 needs an auxiliary circuit sized for the cutting cylinders plus, if fitted, a rotation circuit for the 360° dual-motor or twin-cylinder options. Confirm flow, pressure, return restriction and case drain against the current data sheet using the hydraulic matching guide.

Typical work and production considerations

The WR10 fits the 12 to 16 tonne machines that dominate road corridor clearing, rail corridor vegetation and subdivision and civil clearing because the carrier is easy to float under traffic control or into a rail possession window and easy to return to bucket work afterwards. A realistic corridor site might present half its stems between 150 and 300 mm, a third below 150 mm and a small tail above 350 mm. The WR10 handles the middle and the tail in single cuts; the smaller stems are where the optional accumulator earns its money by bunching before each placement. Rotation matters more here than in open-paddock work, because a stem cut on a batter must be turned and laid along the corridor rather than dropped across the carriageway or the track. In hardwood, expect slower cuts and faster blade wear than the European footage suggests, and time a trial in your own timber before quoting per stem or per kilometre.

Limitations and when to step up or down a size

Step up to the WR15 when the carrier is 17 tonnes or larger, when 400 mm plus stems are routine rather than occasional, or when the lift arithmetic above keeps landing on the wrong side. Step down to a WL when most stems are below 250 mm and access, transport or carrier stability dominate. Do not push a WR10 onto an 11 or 12 tonne machine on the strength of the family’s 11 tonne floor without a written compatibility assessment for that exact excavator.

Options and configuration to settle at quotation

Settle the rotation type (360° dual-motor or twin-cylinder, or none), the accumulator, the fork tower for handling larger stems, the steep-slope pedestal where embankment work is expected, the bracket and hitch, the hose and coupler package, and the total configured weight. Ask which combinations are available on the WR10 specifically rather than on the family.

Wear parts and support

The consumables are the Hardox blades, blade fixings, main pivot pins and bushes, cylinder seals and rotator seals and motors. Ask for blade and pin kit pricing, the sharpening or replacement threshold and where stock is held in Australia; the wear parts guide has the full list. Machinery Specialist is the Australian distributor and handles serial-specific parts enquiries.

Confirm before ordering

• That the WR10 sizing on this page is indicative and the quotation carries the current factory data sheet for the exact model
• Configured weight with rotation, accumulator, fork tower, pedestal, bracket and hitch
• Over-side lift-chart check at your working radius with that weight and a 400 mm class hardwood stem
• Flow, pressure, rotation circuit, return restriction and case drain against the current data sheet
• Rotation type: 360° dual-motor, twin-cylinder or fixed, matched to corridor placement needs
• Whether the accumulator pays on your stem distribution or adds unnecessary mass
• Hardox blade replacement price, pin and bush kit price and Australian stock location
• A demonstration in representative Australian hardwood before rates are committed

Frequently asked questions