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Jansen Log Spliter 20 Ton FS-Speed with 3.5 PS, Briggs & Stratton petrol


Condition: New
Price: £ 1096.00
Shipping Cost: £ 150.00
Prices incl. VAT

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Rating: 5.00 / 1 users voted



In stock delivery 4 to 10 days



With its patented design, the Jansen FS-20Speed flywheel wood splitter constitutes a revolution in wood splitting.

It would be virtually impossible to split a large quantity of firewood more quickly than with our wood splitter. The FS-20Speed exploits the principle of kinetic energy, i.e. the momentum from a heavy flywheel. The splitter generates kinetic energy of 20 tonnes - sufficient to split every piece of wood grown in European forests.

In principle, this type of wood splitter is not a new invention but has been available since the 1960s, especially in the US.

However, the drive unit of our splitter has been refined. Thanks to a patented combined technology involving a special coupling system in conjunction with a centrifugal clutch there is virtually no load placed on the drive pinions and gear rack.

Compare this with the solutions provided by the competition where in many cases a rapidly rotating drive pinion is engaged from above or below into a gear rack at standstill – obviously this type of system will not last for very long...

This is certainly not the case with our system. Our patented technology means that the drive pinion and gear rack are permanently engaged. This ensures extremely long service life and great user friendliness. Our equipment also avoids the customary “hard blow” to the palms when engaging the drive pinion in the gear rack.

The following drawing will make things clearer.




Our kinetic splitter is the most powerful, smoothest engagement, safest and most reliable because:

  • Clutch & gearing allow constant rack engagement lasting longer than competitive products
  • Smoother engagement action vs. dropping rack on moving pinion
  • No kickback from rack disengaging
  • Economic design
  • Clutch allows for safe rack speed and maximum power

The Jansen FS-20Speed is supplied with a top quality 4-stroke OHV petrol engine.


  • 4-stroke OHV engine, 3.5 PS, Briggs & Stratton
  • Fuel: regular Petrol
  • Starter: recoil pull starter
  • Weight: approx. 177 kg
  • Towing speed: max. 25 km/h
  • Max. splitting length: 52 cm
  • Splitting slider velocity: approx. 3 sec.
  • Splitting pressure: 20 tonnes (kinetic energy)
  • Splitting wedge, length: 16 cm
  • Dimensions 227x77x103(LxWxH)
  • Dimensions, packaged: 166x57x106 cm (LxWxH)
  • Quantity of engine oil: 0.7 l (10W40 or 15W40)

2 year parts only warranty, you send us the photo of damaged part , we access and post you out the replacement part and you make the repair.

The equipment is supplied dismantled and delivered well packaged in a wooden crate. You should allow around 2 hours for assembling prior to putting into operation for the first time. The scope of delivery includes an instruction manual and several exploded views. Assembly should not cause any problems. If you do need assistance nevertheless, we will be pleased to help. When putting into operation for the first time, you will need approx. 1 litre of engine oil for the engine. We recommend a 10W40 or 15W40 multigrade oil.

Internal item#: 1028584278


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Goronwy Davies
18 August 2017
After assembling and using for the first time, I'm impressed with the speed of the splitting and ease of operation. The manual supplied gave good instructions for assembly, but information on service and maintenance is not as detailed. Hopefully, procedures will be self-evident when covers are removed to expose the mechanism - especially for lubricating, which I assume is an important factor for trouble free use.

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