If the front deck was open then I think it would work fine

Saw blades have no lift, no air sucking the grass up to be cut. If you made the front of the deck adjustable like the old dixie choppers those saw blades would be mean in brush. Or just cut the front of the deck off so the grass and brush can feed right into the blades

No not Fail! Make more space from end of saw blade to mower deck/guard (smaller saw blade). This will allow the grass to enter in between the deck and the blade. 👍

Blades have a kick up that creates lift, pulling the grass up so the blade can hit it. The saw blade has nothing to create lift.

Hallo super Idee aber die Sägeblätter müssen kleiner sein , damit das Gras sich unten im Mähgehäuse aufstellen kann. Sonst rutscht das Gras nur über die Sägeblätter drunter durch . Das heißt du brauchst im Mähgehäuse vor den Blättern Luft , damit das Gras da gerade eingezogen werden kann . Oder du verwendest ein Messer das 4 Klingen hat . Jede Klinge steht zur anderen um 90 Grad versetzt ( wie ein Kreuz) . Mfg.

theres nothing sharp or heavy, just no space grass to come and by cut.

You either need to cut the front of that guard off or get smaller blades you didn't leave enough clearance for the grass to even get up under that deck into the blade

Use a 10 inch carbide blade and the standard mower blades

One problem I noticed was, you had one saw blade teeth facing one direction and the other blade facing the opposite direction. Both need to be facing the same direction towards the discharge chute. Also cut some vertical slots in the front leading edge of mower deck to allow taller vegetation in. 3th, get yourself some livestock (cows🐂🐄, sheep🐑, goats 🐐, equine 🐎🦓, that they will gladly eat/graze all that vegetation down. I have not worried about mowing my yard area for decades. 👆😉🙂

The mower deck is knocking down the grass, so if you opened up the front of the deck, i bet it would do better.

You made the blades to big to work on a closed deck. You’d have to cut the front open like a brush hog in order for that to work

They have no vacuum too lift the grass....slot the blades in at least four spot bend at angle and sharpen.

The circular blades aren't being used because the Deck of the Mower acts like a shield. If you expose the circular blades they will cut. The Deck pushes the grass over and so does the circular because there isn't enough clearance to let the grass stand again. Cut the Deck of the Mowers edges to expose the spinning blades and I bet it cuts just fine. But beware of what flies.

Due to the engine struggling to turn discs I would recommend removing some of the material from inside the desks to create what would look a bit like a wheel with teeth on the outside of it. This should help reduce weight but also increase the speed at which they can be rotated at. Also It might not be the best lawnmower ever created, but Jesus, it’s the one mower I want in a zombie apocalypse, you can really run over all those crawling zombies

Try making smaller saw blades! An sharpen them it might do better

you are forgetting something, or maybe you just don't know. that lifted area right behind the tip of the blade is called the "sail". it has 2 purposes. 1. it helps throw the grass out from under the deck. 2. it acts like a vacuum in that it pulls in air from the edges of the deck which in turn helps stand the grass up so that the blades can cut it. The uplifted area to the inside of the tip, is the mulching area of the blade. it's function is to pull the air(and the grass) down through the blades again, cutting the clippings into smaller pieces and then throw them down onto the freshly cut area. If you want to mow taller grass, buy a set of "high lift" blades. this type of blade does NOT have a "mulching" area on the blade, but it DOES have a higher "sail" that moves more air to help stand up the grass. Plus, it throws the grass out from under the deck more efficiently . You will have to open the side chute cover on the deck before any of this will work. I hope this info helps you

za tako visoku travu preporučam manju brzinu i onda opet drugi put. Ja kosim travu za život i često kosim visoku travu. inače koristim google translate pa se ispričavam na greškama

What's needed is some fins that will cause a vacuum to draw the vegetation upward.

Fun project, but look at how agricultural mowers cut silage. Long wet grass, effortless and very short with cone blades. Downside is more maintenance, that's where the traditional blades win big - the odd stone doesn't affect cutting too much.

You'd have to take off the housing of which the blades are it, that way there is room for the grass to actually hit the front/edge of the blades when the blades turn

If you open the front of the mower, the saw blades can get to the grass. Open the front of the mower and please try again

You need to cut the vertical portion off the front of the deck. Then the blade will hit the grass. Of course it could still get wrapped around the spindles, because those blades won't chop the grass into small pieces like the normal blades. Funny experiment, though!

I use mulching blades, they lift the grass chop it up. In order for the saw blades to work you would have to drive very slow.

The shape of the blade sucks the grass up so it can be cut. Your saw blades don't do that and the is so little gap between the deck and the cutting surface that most of the grass doesn't have an opportunity to go up in there.

Open up the front of the deck the width of the blades. This will allow the blades to work better and cutting instead of the deck bending the grass over and not allowing the saw blades to touch it

Cut lightening holes in them to make them lighter and will spin faster and easier.

probaj staviti rotacione noževe na disk manjeg prečnika

Yep. I didn’t think that they would work. Even your original blades were not the correct ones for doing what you were trying to do. You need to get high lift blades. The ones that you have are just created for mulching with the discharge chute being closed off so that the grass could re-circulate inside the deck to get more finely cut. The circular blades didn’t work because they had no lift at all. They Just pushed the grass down.

That's 8 minutes of my life, I won't get back !😢

It would leave grass uncut the size of the saw blades only cutting grass where the edges of the blade hits thats why big uneven patches are being left (alot more passes would be required).regular saw blades rely on the length of the blade not a flat surface..a thinner bar type blade creates an updraft effect

Stick with it and with a few trials and errors you might be onto the next big thing. I suggest cutting holes in the saw blades similar to tire rims. My thinking is that it would create more lift and mulch the grass similar if not better than those X-blades

The main problem cutting very tall grass and weeds is the deck gets clogged too easily, slowing down the blades and engine. The solution is to cut away the front of the mower deck so the grass doesn't have to only go out the chute on the side. There is a problem with this though, cut grass will spray out in such force to the front it'll hit the front wheels etc and splatter back towards you and the mower coating everything with green gunk. It's still useful though. I have two decks now. One cut away for doing tall grass, and one unaltered for mowing normal length grass.

I believe if you cut out the front edge of the mower deck it could get to the grass better. Maybe also less & deeper teeth. Very interesting!

I'm fairly certain the issue is that the blades lift the the grass and cut it. The saw blades don't lift the grass, hence poor performance in tall grass.

Top quality content. Thank you for taking the time to show us. I like how you don't talk in your videos. This is only the second video I have watched from your channel. Maybe you talk in the other vids? Anyways, it's a very unique approach (not talkin) from my perspective. Unique to me, and highly effective. Thanks again.

Hallo Doctor D.S., Dein Video hat mit sehr gefallen. Weil ich aber Hügel habe, habe ich einen 4x4 Rasentraktor. An einigen Stellen kommt er aber trotzdem nicht hin. Zusätzlich habe deshalb einen kleinen RC Raupenmäher (550 mm). Das ist perfekt. Ich habe aber keine so schön aufgeräumte Werkstatt wie Du. Grüße aus einem Ort nahe Berlin / Deutschland. Bin die Nr. 6068.

Try this little trick..... Take 2 sets of regular blades, cross them over like an X on each side and give that a go. The problem with the circular blades is that there is no space between the blades and the deck for the grass to stick up above them to be cut. They are simply mashing the grass down. I have never done the X blade method myself but I have seen videos on here where other people and especially high grass seems to fall victim to them every time..... Good luck!

Lol...well don't feel too bad. It was an interesting idea anyway.

Cooles Gefährt! Macht bestimmt viel Spaß damit herum zu heizen. 👍

If the front of the deck was cut off the saw blades would work, nice video

Cut out + shape spokes and sharpen them so it lightens the blade and lets it cut once it moves past the saw.

We need to come up with a front mower for tall grass. The idea with fire discs👌👍

Veliki precnik testere. Mora manja da bi uhvatila testera, ovako dok se trava podigne, padne na ravan deo i tu nema secenja. Pozdrav

If you cut the front of the mowing deck off so the blades have better straight-on access to the grass, it MIGHT work a little better.

I am definately making snow chains for my lawn tractor thanks for the video. I know this is the wrong vid but I just watched the others. Great work.

Of course they didn’t work you didn’t leave enough room for the grass to get in between the deck surround and the blades plus the blades are to heavy drill holes in them to lighten them up and cut them smaller by about 2” inches change the pulley size to spin faster

You screwed up, you have to cut the front of the mower deck open so the grass doesn't get folded down by the mower deck first

Part of the reason the circular sawblades won't work well is because they aren't sharpened. However, more than that - standard mower blades act somewhat like fan blades, which you'll notice they have an angular piece on the back of each side of the blade. These angled pieces make the blades double as propellers, pulling the grass up into the blades while they spin. This is what makes the knives very efficient at finish cutting. For what is trying to be accomplished here, you can try angling the 'teeth' of the sawblades down 10 or so degrees, then sharpen the leading edges. That should accomplish similar results to the knives, but the torque of the engine will limit what they can cut. Additionally, having that many teeth will only be realistically useful for going very fast across very thin foliage. For thick foliage, heavy brush blades that can swivel from their hub and have a blade all the way down the shaft will be far more effective. Brush blades for trimmers use this concept very effectively, some even going as far as serrating the blades.

smarter every day made a video showing how lawnmower blades work, I would recommend checking that out. another idea is to stack the blades so that they make a cross. I've thought about doing this bit haven't yet. I have a mower I use for blazing trails at our hunting property. I'm often going through heavy grasses. those might help me but I would want to slow the blades down a bit to make the belt last longer and the hubs not blow out

Add a vacuum to grass shoot and you will find excellent performance. You need to have air flow to suck the grass up into the blade. The lawnmower blade has a air foil that sucks the grass up

It's because there there is no suction. Blades will create an updraft(like a fan) pulling the grass up rather than just pushing them over. If you put holes in the saws it will create a suction(think of a fan) but then basically you just have blades, more or less.

Make air ways in the blade, lighten it up a bit

The problem is, the original blades are pitched, like propellers, to be able to move air. The saw blades don't offer that 'lift', so your side discharge doesn't work at all. That lets the clippings ball up under the saw blades, and because of loading up, don't offer the quality of cut. If there was a way to provide airflow to remove the clippings, the saws would probably work quite well.

You would be far better off cutting 25mm off of the front shield of the deck it will then not bend the grass over so far and allow a cleaner cut. I’ve already done it so no need to experiment as it works very well here in Australia

Perhaps a combination of a down scaled straight combine harvester type comb mounted on the front of cutting deck (or mounted on the front of tractor) to cut the tall grass AND reattach the usual flat mower blades in cutting deck for the shorter grass??? If the new front attachment works, the secondary standard mower blades might cut the stubble the front attachment creates... I am no engineer but just a thought that could be fun to try.

need to cut off and reinforce the front edge of the deck to allow the grass to stand up in order to cut it

Yes notch out the front of the deck so the cutting edge will hit the grass.😊

you should totally try chains kinda like the brush cutter chain but modified for your ride on and in as safer way as possible

Why you thought that would be a good idea is beyond me mower blades are designed to pull the grass up with air force to also cut the grass circular blades are gonna do nothing

mower blades create a vacuum to pull the grass up then cleave it. ;)

So question if yo chop the front of the deck off made it open and reinforced the top and sides how well would it work as a brush mower

Here in lies the problem, your deck is designed for lawn nothing to do with the blades. Remove the front edge of the deck, probably pay to reinforce the deck as cutting it will weaken it considerably... being the tricky handy fellow you are, make the front edge hinge with some sort of mech linked to a lever so you can adjust between the two "modes" 🤔 One of my mowers has a removable front edge from factory(Cox Lawn Boss)

If you cut the front of the deck open it would probably have done better.

I think the diameter of the saw blades are so close to edges of the deck that when you drive over tall weeds/grass the holds them down below the blade and the don't get cut. A regular mower blade has all the room on both sides giving the tall grass time to pop up higher than the blade and will get cut. Two ideas, either make the diameter of the two saw blades 3/4 of the current diameter size made or remove the front of the deck exposing both saw blades to the grass to be cut. Bar blades have a wing on them that draws air in pulling the grass upward into the spinning blade and the air is forced out of it's one opening pushing the cut grass out with it.

i bet if you cut out the front of the deck it would do a whole lot better.

This is probably why they don’t sell circular saw blades at the lawnmower store . LoL 😂

It appears that the circular saw blades are so wide that there isn't enough adequate space in the deck for the grass to come into contact with the cutting edges. Also, it would seem logical that the round blades should be level with the bottom of the deck or even a bit lower than that. Another improvement would be to increase the angle that the blades come into contact with the grass, lowering the front of the deck should(in theory anyway) improve the blades ability to make proper contact with the grass and cut it relatively cleanly

Ive thought of doing something similar. But what i think would work best is cutting the front of the deck off. Yes it takes the danger factor up, but the deck is folding the grass over, not allowing the blades to cut it. The regular blades would even work better. But this idea is only good for tall grass

if you are trying to cut tall in 1 pass the get a pull behind mower that matches your deck width.

To begin with the blades need to be cut in the same direction not one forward and one backwards second the blades need the teeth hammer down so that they’ll actually cut instead of just load up with grass

This is part of engineering. Sometimes it looks good on paper but it doesn't work. I thought it would work too.

Should have cut out the front of the mower deck it wouldn't lay the Grass down before hitting the blades.

I like it! Problem though is blades produce air, which aids in lifting and ejecting the grass and these saw blades don't. I still like it!

nice try sir. everybody is smart now ,after your test. so dont vorry , but be careful, blades can harm you. wish you all the best

Not that it would help but one of the circular blades is on backwards. With practically any regular mower, the problem with really tall grass is that the front edge of the deck pushes the grass / weeds over and before it can spring up and be sucked into the blade, the back Edge of the deck begins traveling over the same grass. The stuff left standing is what was still being pinned down after the blade already passed by.

iff you take the front protection away you get more gutted

Should have just sharpened the blades and they would cut just fine.

the mower deck was folding over the grass so its not cutting it. i use saw blades on my weed wacker and it goes through tall weeds like nothing else.

the blades does two things, it's angled like a fan to suck the grass upwards, then it cuts it.

You can try raising the chute on that lawnmower deck up it will help with grass coming out, you can use an extension cord for that I do it and it helps with the chunks of grass it leaves out to

So... knife blades actually use the fan effect to stand grass up as they pass over it. This is one reason you don't cut wet grass. The circulars have no way to make grass stand up... best you could do is cut the front portion of your deck off and sharpen the tips, pretty sure the knives would still do better.

Interesting experiment. Wonder if you reduced the weight of the saw blades by having the laser guy cut out some designs in the blade like holes they cut into car rotors?

take four Pie cuts out of each circular blade and then try it

As other commenter hinted at, needs to have way for grass to reach the blade without being folded over below the blade level, the front part of the blade guard needs modification

I think it could work. But you will need to make some changes. The reason being because the blades are in the housing. The grass can’t get up in there for the blades to cut. So you could lower the blades to where they can. It make the teeth on the blade much bigger. Say like the size of a claw on a large bird. About 4 inches in size. You will also have to make air slots in the blades with up tilted wings. So a sort of vacuum effect is made. So it lifts the grass up with suction so it can be cut with the blades.

As long as we're experimenting here, cut the lead edge off the deck, so the blade meets standing grass. The deck is pushing the grass over, not the blades. Also, change the oil in your transmission. It didn't sound too happy. Other than that, I give your experiment a -10.

Make the blades smaller doesn't allow room for grass to stand up to cut properly. Cool idea.

the reason why lawn mower blades are made the way they are is because lawn mowers were not intended to use big circular blades for one the cutting edge on the circular blades are on the wrong side. The circular saw teeth cut wood with the wide edge shaving the wood while mower blades are shaped more like knife blades and that's why they are on mowers.

You have the beginning of a good idea. I think that if you take the blades back and some fans cut into and bend them up at the right angle that would give you the vacuum. Then cut the decks front so it doesn’t bend the grass over. You may have to cut some of the top off also. Let me how it works for you.

The saw blades had no cutting edge. Perhaps if you put a bevel on each, like the standard bevel on a normal blade, you would have better success. Also, the mass of your saw blades is much higher than standard bar blades, requiring much more power to spin. I suggest you cut out most of the center, leaving five or six "spokes" supporting the outer rim and teeth. You might also consider twisting the spokes to provide lift to the grass, allowing for more opportunities to be further chopped up.

Kako si i svaka ti čast

Its not the blades but the front of the deck pushing the grass over before the blades can cut it. Cut the front of the deck off so it doesn't push the grass over and watch how its cuts, so much better. I cut my my deck and added 3 or 4 links of chain to hang down where the deck was cut off.

Idea nije loša ali mora da se napravi drugi deck, i ja samo kontao da napravim nešto poput traktorske kosacice ili leteci nozeva da mogu da kosim visoku travu, ali se mora napraviti drugi deck, mora biti otvoren sa prednje strane i sa zadnje strane da se trava ne lomi prije nego naiđe na nož, i da može da trava nesmetano izlazi nazad da se ne nakuplja na noževe.

The saw blades are spinning/rotating the wrong way, flip them over and try again.

4:13 GRATE or GREAT🤔

Only problem they have no lift and also doesn't throw the grass out.

I liked that you tried even if it didn't work it was badass.

Need to open up the front and the rear to let the grass in and also expell the cut material. Edge of the deck is constricting the grass to get next to the blade. Had a wheelhorse mower with open deck design, would lay the grass out like you were making hay.

I would be so afraid to engage the blades with those things on it 😂

The circular sow works if you you remove the obstacle in front of the cutting blade. You just ned to cut the deking in front of the blads.