You just can't kill it... 

That's what Bruce said - a full-blooded Aussie who had acquired a Kelly harrow. Bruce's goal was to test if this peculiarly looking harrow was able to live up to the dealer's many selling points.

It was, and as Bruce enthusiastically told Helle and Bjarne: You just can’t kill it, Helle - you just can’t kill it....  

Listen to Bruce explaining the Kelly harrow at denne video - but you better have your Australian dictionary at hand!

Details

Kelly MPH’s efficiency is primarily based on:
• The chain is formed by interconnected discs
   (no fixed shafts).
• Chain flexibility (follows the surface).
• Chain angle, tightening and assembly in the bearing
   housings.

The working depth is 2-6 cm, according to soil type and conditions. The chains’ special 43-degree angle to the driving direction means that the discs partly roll and particularly ”peel” the soil, thereby clearing plant material on the soil and leaving an even, fine surface.

Framework construction
The harrow is based on an articulated framework construction, fitted with main wheels as the fixed part.

The wings and tail piece are fitted with a floating option to allow them to follow the terrain independently, for example above and below level.

 The chains are hung from loose arms to prevent the weight of the harrow's framework construction from loading the chains which are able to work freely on the ground despite bumps, stones and the like.

The chains are tightened automatically by springs on the larger models and by hydraulic cylinders on the small model.

Working on very stony soil, the chain is sufficiently flexible to "jump over" the stones.