Creating a DIY Battery-Powered Disc Trowel for Concrete using 18V 12Ah Li-ion Battery

Question

Hey. There will be a lot of screed / floor screed in the barn and garage in the near future. I recently flooded one barn in the barn (about 1/4 of the whole area) and I do not like the surface after simply removing it and troweling it with a float. I want to make a small and simple disc trowel...

Magister_123 · Answer

Do you mix concrete in a concrete mixer or call a pea? Like concrete made of crumbs, I wouldn't play in building a trowel.
The factory trowel with a 90cm dish weighs 80kg and has a 2.2 kW engine. As you want to build, no batteries are an option unless it is a dessert plate-sized device.

kkknc · Answer

You have no idea what you are writing about. All the more about mashing work. The construction of the device and what it must have to not drown in concrete.

lobudek · Answer

It will enlighten us. What's so complicated? Spinning plate at a speed of 60-120rpm / min? I do not need to polish the screed, so I do not need the paddles and the entire mechanism (a cross with arms). I order concrete and it will be blurred after a few hours when it starts to set (shoe impression about 3mm).

Magister_123 · Answer

The use of trowel completely fails with ready-mixed concrete. The price includes the cost of buying the platter and the motor, you have an electric trowel for four days or a diesel trowel for two days. Professional and proven device.
Add materials, utilities and your own time to construction costs.
350W motor seems a bit too weak compared to factory devices.

kkknc · Answer

Do it, you'll find out so complicated. You mash almost immediately to remove concrete milk. The cheapest plates from Allegro, laughter in the room melts nicely in concrete and makes strands. Wiper motor. Well, maybe from a Chinese toy car? I wonder why the factory has a much more powerful engine. I do not know what, what calculations did you get 350W power from.

lobudek · Answer

Maybe I exaggerated a bit, but 0.6KW with 3500 / min reduced to 60-90 on a fi600mm plate should be enough. I still don't understand how it can sink if fresh concrete doesn't blot - unless the operator can float in the air and fly behind the machine?

kkknc · Answer

Why should it float? You blur from the corner and remove the traces of yourself from the trowel. You can't give a person who weighs 120kg only one who has 80kg. Mixokreta concrete is semi-solid, you apply the patch and in 30 minutes.
You can walk on it if you don't weigh too much.
30 years ago it blurred a day later. It's just not rubbing, but rather grinding because you did it with stones.

lobudek · Answer

You are talking about a mixocraft ... I will pour ordinary B20 goods as I have done so far or shot myself in a concrete mixer. If not for the fact that I have 50km to one city where I rent equipment, I might rent it, but I will pour the floor gradually after 30-40m2 and it would be nice to have my device. Such a plate + motor with a 1.5kw 230V reducer if the battery version fails the test (I have a large number of 48V23Ah, 36V12Ah li-ion batteries)

kkknc · Answer

I wrote about such plates. Patted on the knee with the spread of parameters such that it is better not to write.
And what safeguards these batteries have and what you can run on them. Even how do you count how much time it will work.

lobudek · Answer

Batteries on new high-current lg hd2 cells 2000mAh 25A load capacity. As for the plate, it does not have to be known how perfectly blurred. Such a plate will certainly clog much better than I take off with a board .... There will be loose grain, there will be a tractor, cars do not have any great requirements.

lobudek · Answer

Some time passed and I forgot to boast. The trowel made according to my thoughts and did a great job with floors totaling about 150 m? so far. I did it quickly last summer in 2 hours so don't look too much at the aesthetics.

lukon1 · Answer

I see that there was a lot to discourage the construction of the power trowel, but to praise for making cool equipment, there is no esteem, buddy, for making equipment that costs quite a lot from the things that can be found in the garage.

palmus · Answer

Way to go! How much does this equipment weigh?

lobudek · Answer

I did not weigh, but with batteries around 25 kg for sure. The trowel is still in operation today. It has already obliterated approx. 350 m2 of floors and is still working flawlessly. I'm just wondering if I should add additional blades to it to blur it on a mirror.

vorlog · Answer

This is what happens when you do it your own way, not listening to experts whose advice can often only discourage.Works? It works. Does it do the job? It does. What more is needed? A CE declaration of conformity? V.

robokop · Answer

I read it and I can see that no expert wrote here - a standard problem for some users who think they know something. What is particularly interesting is: From what I saw, it was always a Styrofoam float.

vorlog · Answer

That's why the term specialist was in quotation marks. By the way, when my brother-in-law, a real concrete and stone specialist, was making a concrete screed for me on the porch, he removed the smoothing compound after a few hours of setting the concrete with a steel trowel. He wouldn't have touched it with Styrofoam because you could walk on the concrete freely without leaving any major marks. Styrofoam boards are rather intended for plastering work. V

kasopey · Answer

I'll probably get a golden shovel soon, but I just recognized a similar topic and ended up here. I am very impressed that you built such a device yourself and in ~2 hours.

lobudek · Answer

I put it together in 2 hours because I had to buy/find all the components first. Despite being a makeshift device, the device still works today. I only changed the gear ratio to a slightly slower one (larger sprocket) because the engine warmed up a bit after prolonged operation.

Creating a DIY Battery-Powered Disc Trowel for Concrete using 18V 12Ah Li-ion Battery

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