TMK 400

"Big Boy"

TMK 400 ”Big Boy” is the largest and strongest one in TMK’s current product family. TMK 400 was developed to cut down Central Europes big trees, and the power to this produces the custom designed cylinders. Thanks to these cylinders we can cut up to 400mm trees. Big Boy fits to excavators from 10 ton to 30 tons.

400 mm

535 kg

10-30 tons

More about the Big Boy

Shear opens respectful 1070mm, and thanks to its light weight it provides a great tool to cut down the smaller brush as well as the big logs. The strong capsular structure in TMK 400 withstands the tensions of cutting down the big trees and still the weight is being able to kept under 550 kg! The recommended hydraulic pressure to TMK Big Boy is 200-300 Bars, depending on the chosen cylinder.


Efficient attachments will widen your work possibilities.

Grow with your work


The collector increases the productivity of the shear significantly. Collector works automatically with open-close motion all the way to the point where the bunch is dropped. When the shear is closed, the collector opens up to the other side of the trees, and when the shear is opened again, the collector first grabs the trees firmly in its grip. This way the trees stay all the time firmly in hand. Only when the bunch is dropped one electric line is needed to let the bunch go from the grip. Collectors simple operation enables fast and comfortable working. Thanks to its high productivity, the collector is TMKs most popular attachment worldwide.

NEW! Collector is now available also without electricity! Ask more from your local dealer, or directly from TMK.


Delimbing gives the last touch to the tree clearing as well as the TMK 400, TMK 300 & TMK 200 attachment package. TMK has the first easilly controllable delimber on the market without expensive feeding systems. Delimbing is smooth thanks to the diamond shaped delimber hole. This shape gives the shear a little room to tilt before snapping the tree with the blade. This way is ensured a fast and smooth motion, when the delimbing is fast and more importantly easy. In the nordic countries the delimber is really common attachment because of the demand of stripped trees. Delimber is also possible to use without electricity, and delimber is also easy to retrofit.

Fitting plate

Brackets are on bolt-on fitting plates, this makes it possible to use the shear with multiple machines.

Splitting blade

With the splitting blade you can finalize the trees cut with the shear, without unnecessary hassle. The splitting blade attaches to the side of the shear with three bolts. Splitting blade works best with the bolt-on-blade models, when you can also load or move the trees with the same shear.


With the heel you get more support and reliability to the shear when moving in any terrain. You can safely take support with it, no matter the size of the machine. The heel attaches to the backside of the shear with bolts offering good support point when moving with the machine.

Cylinder options

TMK 400 can be equipped with different cylinder options.

1. Normal main cylinder, recommended pressure 280-300 Bars.
2. TMK Turbo is patented telescopic cylinder, where the smaller cylinder works always first, keeping the motion fast. When the smaller cylinder runs out of power, the bigger cylinder starts working automatically. This way we get really fast motion without sacrificing the strength at all. TMK Turbos’ recommended pressure is 200-220 Bars.

TMK Turbo is excellent choices when working with tilt rotators, when the reduced pressure doesn’t affect the maximum cutting capability. TMK Turbo grows your work efficiency up to 15%!


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