Vimek listened to their users and does from now on offer the Nisula 325H wheel-feed harvester head from Nisula Forest Oy as an option on the harvester VIMEK 404 SE and the combination machine VIMEK 404 DUO. In addition to the well-proven and tested standard harvesting head from Keto Harvester Oy.

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- The two Finnish-manufactured heads have slightly different strengths and we are pleased to now be able to offer our customers more alternatives, says Johan Johansson at Vimek who has tried both.

About Nisula Forest Oy  

The company, which was founded in 1978, is located in Jämsä Halli in Finland and specializes in the design, development and manufacture of, among other things, thinning harvesters, harvester heads and biofuel aggregates as well as other forest machines and equipment.

We asked Nisula what they think they can add to Vimek 

- Our Nisula harvester head has a simple structure and is easy to maintain and they are manufactured from high quality materials and components which guarantee good quality.

- The Nisula 325H head [Vimek’s first wheel-fed harvester unit] is particularly suitable for a first thinning and processing of sprigs of energy forest. It is equipped with a fixed and three movable twig knives, which improves stock keeping and helps to make harvesting efficient and smooth, says Kalle Mattsson at Nisula Forest Oy.

Nisula summarizes  

  • The unit is very easy to maintain. All lubrication points can be lubricated with the unit in the same position.
  • The unit has no longitudinal cylinder movement which minimizes hose movements and thus the risk of hose damage.
  • The saw control and automatic chain tension improve efficiency and reduce the costs for saw chains and sawdust.

How Vimek did when evaluating Nisula  

- We started by testing Nisula's harvester head on a Vimek T6 for about 3000 hours and then we mounted it on a Vimek 404 SE harvester and got it compatible with the Dasa control system. In addition, we also hired two test pilots, who run our harvesters in their work, who had to try out the harvester head during about a year, says Johan Johansson, Vimek. 

The test pilots were Magnus Tykosson from Hassela Skogsentreprenad AB and Erik Landby from Landby Forest AB. Magnus drove about 2500 hours and Erik Landby about 600 hours with Nisula's head.

They summarize their experiences of Nisula as follows:

  • Good and safe length and diameter measurement.
  • High reliability and production.
  • Improved stock grip when felling. My Keto unit only had  two knives [Magnus].
  • Lower operating costs due to wheel feed. The conveyor belt is worn hard and breaks.
  • Does not pack snow.
  • Somewhat lighter than Keto.

Erik adds: Due to the wheel feed, Nisula pulls slightly less than Keto, but on the other hand has a higher feed rate and a good sawmill, which together makes it a faster head for the thinning we have up here in the north. In my opinion, Nisula’s aggregate has a better overall economy in the first and second thinning. If, on the other hand, I was based in southern Sweden, with more coarse-grained forests, then a Keto unit with higher traction might probably fit better.

What's next  

After a thorough evaluation, Vimek can now release this news with good conscience. And for those who are planning to buy a Vimek harvester, just decide which harvester unit best suits the need - Vimek has the options.

Watch video: 

Technical specs 325H:

For more information, contact: 

Johannes Nilsson, CEO, Vimek AB 
Tel. +46 70 234 95 34 or This email address is being protected from spambots. You need JavaScript enabled to view it.


Kalle Mattsson, sales and marketing director, Nisula Forest Oy 
Tel. +358 10 289 2040 or This email address is being protected from spambots. You need JavaScript enabled to view it.

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