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well, im begining a review about two orbital sanders, the dwt ex-125 vs, and the hitachi sv 13yb.
i ve bought, at first, the dwt, for his low price and high power. it has 450w of power, against 230w of the hitachi, and its cheaper.
aparently, its a great tool. fine build quality. to start with, its weight is about 2200g, against hitachi (and others average)s 1400g.
however, the tool came with one sandpaper disc. i used it, and, after a little while (about 1 min), it deprended from the pad.
the sandpaper doesnt stick anymore, neither in this pad, or in any other pad. it became useless.
its a new sandpaper, you can seee this, and, after some minutes, useless.
i tried others products too, like this bosch sandpaper here, and the same happened.
and it happened with one, two, and with three sandpaper discs.
after the third, i did a research to find out whats going on.
what i found is that the velcro hoop of this pad is not what it is supposed to be.
all the sandpapers have similar textures (the velcro loop).
its a soft touch, like a cotton fabric.
the pad, otherwise, in the dwt model, if you touch it, you can feel that the velcro hoop is rough, like a very abrasive sandpaper.
all the other pads velcro hoops are much more delicate, like a texturized rubber.
as it was the only visible difference between this sander and other others, i concluded that its possibly the reason for this
defective behavior.
at first, it sticks normally, as you see.
so i will return it to the store, and look for refund.
but before, i did this review of the sander, so anyone can see what it is, and avoid complications.
as a complement for this statement, its not only a individual issue.
i went into a dwt office, and what the employ said was exactly this "i really dont know whats going on".
and showed me a reposition pad, which is identical to this one. so, the problem is of design, not a individual production failure.
i have only one working sandpaper left, so i will begin with the hitachi model, for obvious reasons.
i will use the sander in this pinus plywood, that was very damaged, and in which i aplyed a layer of putty.
as you can see, this sander does a really good job. its fast, and the finishing is very pleasent.
lets stop it...
now, im gonna use the same sandpaper in the dwt model, to show what happens.
you can see that, for being more powerfull, its more difficult to handle it.
but, its a fact, it gets results faster than the hitachis one.
[YOU CAN FOREWARD THE VIDEO 4 MINUTES, ITS ONLY SANDING]
there.
it happened.
this time, it took a little more time than in the first 3 times.
i think the dwt model just felt what this video is all about.
but did not disapoint me.
it simply doesnt stick anymore, in any pad.
this sander turns the sandpaper useless.
i think maybe its a consequence of its high power.
maybe, and its only a guess, if i would use the sander in a more low configuration, this would work.
after all, it has double the power, half more weight and its bigger.
maybe, this wouldnt happen in lower configurations.
but i cant see the point.
why have a powerfull sander, if in all of its power, it just damage the sandpapers?
hipotheticaly, this tool spins at a maximun of 11000RPM.
the hitachi model runs with a little more, about 12000RPM.
this sandpapers, its not written here, but i remember of reading that these works at at maximun of 14000RPM,
what i definetively believe, because in general, the others sanders works at higher rotations.
so, the problem is not the sandpaper. its the dwt tool.
its a useless tool, since it doesnt support its sandpapers!
if you re thinking in buy this product, because its cheap and powerful, think again.
if the problem is really the pad, to make it usefull, you first would have to find a pad that fits.
unfortunately, i think that just there arent any other possibly pad to use.
the models i had researched, in general, comes with three screws.
in some ones the screws are more closer, in some ones they are more spaced.
this one has four screws, so, you dont really find many options.
there s a bosch model, GEX 125 AE, that use four screws.
but, unfortunately again, the holes are in other positions.
in this model, the distance between holes is of 3,2cm.
in the bosch model, its 2,95cm. so, they re just incompatible.
and it would be hard to adapt one, given that these pads are hard loaded with high vibrations and rotations.
they have a reinforcment of metal, inside the pad, designed to the specific position of the holes.
if you make other holes, in other places, the risk of it doesnt work is too great.
worse: you can damage the object you re working with.
so, i just didnt try it.
beside its cheap price, this sander already costed me fortunes, in headaches, in calling the dwts assistence,
the sandpaper manufactor, in going to offices, stores, reading manuals, just to have a clue of what was going on.
so, its much simplier to return the tool to the store.
its a bad product, and a unfixable one too.
so, be careful.
as a complement, considerering that i used the hitachi model in this review too, let me say a few words about it.
at first, i was going to buy a bosch model, the GEX 125 AE.
but, with much more caution this time, i tested in the store this model, so i did with the hitachi model (both with similar prices).
there were many disadvantages in the hitachi model.
the first is that in the boschs model, theres no bag of fabric.
theres a plastic container, that, i think, its a better solution.
and can more easily be attached to a vacuum cleaner.
second, the top of the sander, which have a bad design.
comparing with the rubbered material and ergonomic design of the boschs one.
these grooves, the hardness of the plastic and the shape of the top are terrible - your hand hurts.
just grabbing in hands the two ones gives you the idea of how different they are in terms of touch and comfort.
is that the hitachi model lacks the control of velocity, and the bosch model has this capability.
but the worse about the hitachi model is its pad.
the pad, i cant know if you can see it through video, its not perfectly flat.
so, there are unequal waste, therefore there is a fast degradation of the pad.
but i knew that, differently of the dwt model, this pad use a standard spacing of holes.
so, after this pad became useless, i will buy a dewalt one and adapt.
but, why i ve bought these model of hitachi, if the one of the bosch had a perfect pad?
because these one gives results faster.
so, as i hate to sand so much, i bought the one that was faster.
what i was told in the store is that its because the pad oscilates in major distances,
so, despite the similar size, powerful (230W of the hitachi against 250W of the bosch) and rotations (about 1200RPM),
the results are just better.
the bottom line: just dont buy it.
bye.
another low point of the hitachi model, comparing with the boschs one,