The most reliable tailgate spreader on the market?

The Polaro E uses a very different technology to other spreaders you will see on the market, allowing it to deal with a wider range of salt products.

 · 3 min read


The Polaro E uses a very different technology to other spreaders you will see on the market, allowing it to deal with a wider range of salt products, more easily and with fewer electrical issues.



The Motors


The motors that operate the agitator and spinner are the heart and lungs of the spreader. Making sure they operate reliably is probably the most important thing in any spreader. 


The Polaro E has 3 completely sealed IP67 rated motors. Each one specifically designed for its unique job. 


  1. We have one high speed motor for the Spinner, controlling the spread width. Which operates from 0-6m.


  1. A second motor for the Agitator to get the salt through the system freely, operating at a much lower speed and higher force.


  1. The last motor opens and closes the flow gate to adjust the amount of material being spread.



Using these three patented purpose built motors we have greatly increased the reliability of these spreaders versus others on the market.


In machines that rely on a single motor operating both spinner and agitator - both components must operate at the same high speed required for the spinner. This puts excessive strain on the motor because too much force is required to turn the agitator at high speed through damp claggy salt. To overcome this, manufacturers need to use much smaller agitators, which then require a vibrator to bring the salt into the agitated area.  We are able to use a much larger agitator and do not require the vibrator. This leads to much less compaction of the salt in the hopper.


As a result, we put far less strain on the electrical components, with the motors all operating well within the designed operating parameters, reducing high loads on the motors and fuses. This has almost eliminated motor failures on our spreaders.


The Controller


If the motors are the heart and lungs, then the controller is the brain.

The controller allows us to operate the individual motors for precise material output and spreading width.


The spinner can be set between 0 and 600rpm to achieve a spread width up to a maximum of 6 meters. The spinner speed controls the width of spread, so you are not relying on baffles. The spinner position can be adjusted manually for optimum spread pattern, which is a special feature on the Lehner polaro range. If needed a different motor option is available increasing the maximum spread width to 12m.


A digital readout makes selecting the spinner speed extremely easy.



Similarly, the flow gate position can be selected from the digital display, allowing the dosage of salt to be finely adjusted. The motor opens and closes a gate at the throat of the hopper, allowing up to 40g/m2 of salt to be applied. At 20g/m2 the 170l hopper we have here will cover around 10,000m2


The controller has a warning light to indicate blockages or an empty hopper - making it easy to tell if there is a problem. 


The controller can be fitted with GPS allowing flow rates to automatically adjust to the speed of the vehicle, giving you more consistent spreading output. This uses a 6 satellite system - providing far greater coverage and accuracy than typical 3 satellite systems found on other spreaders. This is particularly useful in built up areas where the signal from a 3 satellite system may become more easily disrupted.


The controller is hard wired to the spreader with watertight connections providing the most reliable connection possible.


Other components


All mechanical parts on the spreader including the spinner and agitator are made from stainless steel for optimum corrosion resistance. 


The screw on lid keeps the material in the hopper drier and creates a much more positive seal than the clip over lids found on other machines.


The spreaders are very easy to maintain with handy features such as accessible grease nipples. The hopper can be removed from the base with 6 handwheel bolts, so everything is easily accessed for cleaning or other maintenance tasks.


The handles on the side of the base allow you to move the spreader around when the load has been emptied.



For more information on the Polaro E, check out our web page;

https://kerstenuk.com/Lehner-Polaro-E-Tailgate-Mounted-Spreaders



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