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Commercial Flooring News

This Piranha Has Plenty Of Bite

Ian James rates the Wolff Piranha door case saw from Uzin
WHEN reviewing tools I usually produce a list of plus points and a list of minus points and I have to admit I struggled a bit with the minus points with this particular tool.
The first thing to notice is that the tool comes in a Tanos Systainer box and I use these to house the rest of my flooring tools; they all clip together nicely in the van so that is an immediate plus! The boxes have a reputation for being lightweight but still very strong.
The contents of the box includes the saw, an allen key for adjustment, a dust bag and attachment, ear defenders and eye protection, something that can also be used by those wishing to enter a Hank Marvin lookalike competition.
Now for the tool itself, well what could possibly be seen as a minus is the cost of this saw, it will set you back just over £800 + vat. So it isn’t cheap, but what you have to remember is that what you have here is the Mercedes-Benz CLK Brabus with 20in alloys of the doortrimming world! And you have to pay for quality.
There are many doortrimmers similar in appearance to this one, but they just won’t do what this does and what it does it does extremely well. The cutting blade is totally encased and only becomes exposed when the tool is pushed against a rigid surface such as a door, making it virtually impossible to cut yourself.
But I must add that if you are determined to cause yourself injury this product won’t prevent you from doing that. However, I have used a good number of different trimmers over the years and this is definitely the safest.
Adjusting the cut height is an absolute breeze, all you have to do is loosen the thumb screw, insert the allen key into the allen socket on the side of the machine, and turn until the required height is achieved. Then you tighten the thumb screw back up.
There is even a measure scale on the front of the machine which reads the millimetre height from the floor. The minimum cut height is 7mm and the maximum measures in at 27mm.
Higher cuts are easily achievable by placing a laminate or timber plank directly onto the subfloor and letting the machine ride across the top of it.
In fact I would recommend this when trimming on floorboards as they are often cupped or crowned. This procedure will even out the high and low points resulting in a smoother cut.
It is also possible to set the depth of the cut. This is done by releasing the ‘quick release’ lever; then moving the bit stop to the required depth on the millimetre scale. Finally, lock the lever off again.
The depth can be set from 0 to 50mm enabling you to set a shallow ‘score’ to the door first to reduce the risk of splintering. This is not an option you get on similar machines.
The blade can be changed in less than one minute and no special additional tools are needed!

Just undo the thumb screw and slide off the base plate. Then press on the motor gear lock button and lastly undo the allen bolt that anchors the blade. ‘Simples’!!
The saw has a powerful 1.01kW motor available in both 115V and 230V which causes the Tungsten tipped blade to spin at 6,000 rpm with very little vibration.
The result is a virtually effortless cut to ‘even’ hardwood doors. In fact this is the only machine of this type I know that you can actually plane the bottom of the door and not just cut.
The base plate contains a housing onto which a vacuum or dust extraction unit can be attached in place of the dust bag, so minimising the spread of saw dust.
Thus far we have only looked at the single operation of easing doors but let’s not forget that it also works perfectly well as an undercutting/jamb saw. I have even cut kick boards with it to accommodate laminate flooring.
Whilst on the subject of laminate flooring, the product is also ideal for when you get that call to go to a job where the customer has tried to fit their own laminate. Just stand it on its end and cut an expansion gap.
Now for the minus points! I don’t favour the black circular handle on the top. But I can live with it! And now to answer the question that I am regularly asked. If I were buying a new door trimmer would I buy this one?
Well, the answer is: Yes I would! The motor would probably last the same length of time as my current door trimmer, that cost £495 nearly 25 years ago and it still works fine. I have had to change the blade though!
PLEASE NOTE: The opinions and comments expressed in this article are entirely those of Ian James and are not necessarily those of FITA or the NICF.

This article has been reproduced from the Contract Flooring Journal. You can find them at