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Well, I summarized what was said so far in a procedure chart that will be my bible for sharpening... I also included some examples... Case 1)Case 4) Case 5) Case 5) Case 5) Case 5) Case 6) Case 6) Case6)

Because vibration occurs and vibration is not good in mechanical parts rotating. I don't know of any technique to untwist without causing breakage or change in hardness (by heat). I saw now that it is possible with carbon steel, but if it were boron steel, it would be impossible.

Wait a moment... I wasn't talking about sharpening, I was talking about vibration or (axial) imbalance. For me cases 1, 2 and 3 are perfect for use... cases 4 and 5 are unusable. How do you fix cases 4 and 5?

Well, changing a little focus on the waste or not of time in cleaning, I've been observing the use of a MAG-1000 or referencing the height measurement in relation to the ground (MAG-0001...lol...) It is obvious that in any case, if the measurements are identical, this does not guarantee the...

If I owned a lawn mower shop, I'd prefer a sandblaster... it's good for other uses besides blades.

I think I can answer for my team (users)... Time is not a very significant factor when you decide to do it yourself... it can take 30 minutes or 3 hours... often half is spent on preparing the tools. But I understand that sharpeners consider it important, because if they spend a lot of time they...

I don't see any problem... That user who does it will continue to do it with more information and who knows with better quality. That shopkeeper who provides the service too, because the reasons that lead a user to hire the sharpener are many... I, for example, will not drive 7km, wait +- 1:30h...

Excuse my ignorance regarding your original blade... I've seen videos where people sharpen beyond what is necessary or efficient.

Good job enjoying and creating with what's available... I like it! I just don't think it's necessary to sharpen much beyond the original size.

It's not my case, but I understand perfectly what small grains in speed cause in metal... The photos show the final result, but well before that the blades should be retired... horrible and dangerous thing. Yes, the wood70 video, also based on the same source, showed the most correct sharpening...

Here's how things are... your customer gave you the machine for a repair, not to clean or wash... but you cleaned and washed... was it necessary to carry out the repair? Almost certainly not, you do it to add a differential to your work, but you spent time and at least water… congratulations...

TobyU, you must agree that a good cleaning facilitates the supervision of cracks in the blade, which may be hidden by dirt or oxidation, even more so if you use a special spray.

My mower is a Murray 18,5Hp - 42" (2010).

Excellent information material... unless the center of mass is different from the center of rotation in some blades (if I understand it that way), because if the compensation is not in the same part (blade), there must be a counterweight connected to it axis to compensate for dynamic balance. Is...

Attention sharpeners... No answers!?!?!

Well, let’s summarize here… End of blades: So far there is no technical definition for the sharpening limit (apart from cracks, warping or significant material loss), they can be sharpened up to a very subjective evaluation limit. I would like to see something like this: blades can be sharpen...

LOL... the subject is controversial, but the 30° seem pacified... At least you could see how the profile of the sharpening is, which depends on the damage.

As in a short time of use the blades lose their good edge, why not change them for nylon or steel wire? Is there any experience with this? What is your opinion?

I would like to see a trial of a lawnmower with 3 blades... one at 30°, one at 40° and one at 45° and see the result of the cut immediately and after days of use.

One question... A = dull blade that needs sharpening. B = Use of an appropriate power tool for sharpening C= Another form of sharpening with a specific tool. Consider B and C after many sharpenings... What is trend B or C?

Very ecological... but water does not remove the rust crust and in these cases you must use something more aggressive...

But original from the factory or the way it comes to your hands to sharpen?

Star tech I understand your point now... But which angle offers the greatest resistance of blade material to the material being cut, or something else? I am convinced that the 45° is stronger and will suffer less damage...

MParr and Hammermechanicman. What is your sharpening angle?

Another sharpener... very good... For mowing the grass itself, I see no difference between 45 and 30°, other than less material removal... Of course, different damages that can't be resolved with sharpening, blade for the trash. But what does "leave a .030 blunt edge" mean?

I believe that the use and quality of the grass and the ground determine the frequency of sharpening, as I said before, the previous sharpening was 50 hours of use (max 3 months passed)... in my space the lawn is still bad treated and the land is full of fruit trees such as coconut, mango...

Well, for lack of experience with other machines and blades, I'm just talking about mine, but if it's not easy to discover the center of balance, the thing is impossible in my view. In the past I had a small traction mower with a Teconseh engine (6HP), but I sold it in a short time and never...

If you have more than two types around here, I'm already satisfied... the market here is almost exclusive to two importers. What do the numbers in columns 3 and 4 mean?

Good... you're a sharpener and with a dynamic balancer it's a show! Do you know the limit for sharpening? What better angle? Is it very wrong to balance as I described? This is the second sharpening I've done... the previous one has been sharpening for 50 hours with some stones, small coconuts...

You are absolutely right to change the blade, but send the old and sharp ones to the mother-in-law, right? kkkk.... The cost of the blade around here is quite high and sharpening is the first option. I see no problem in sharpening any cutting element, but I would like to know the technical limit.

I don't know what the technical limit is for replacing the blade... probably the manufacturer doesn't even recommend sharpening, but it ends up being up to each person's feelings. Danger of breaking or throwing something out of the deck will occur even with a new blade, but with an old one the...

I don't know the correct way to sharpen a blade, but I'll describe mine... what's yours? In fact, sharpening is not a very important item for many users, because even if the blade is not sharp, the cutter will shred the grass or any tree leaf... but the result is not satisfactory, in addition...

Retired404 Before the carburetor replacement, did the engine smoke? Did you replace the carburetor with an original one? If before the engine smoked and you changed the carburetor for a non-genuine one, you may have entered a second problem, as I don't see how changing a carburetor, even a...

Is the fuel new or old?

Well, my property has +-3,900m² in total, two small houses and a large swimming pool (by Brazilian standards), there is a very large area with many trees, grass with bushes, which grows all year round without stopping and I keep everything trimmed it is expensive or time consuming. Paying for...

According to the report, you have both comfortably, but you don't collect the cut grass... Think about it: For Cut: To collect: Benefits (in my view): - low maintenance (only 1 vehicle/engine) - no additional fuel. - two utilities for 1 vehicle Problems (not much): - space in the garage. -...

The issue has now been resolved... see #16 onwards...DIY...👍

Well, I find it strange that an internal combustion engine manufacturer does not recommend changing the oil, as it deteriorates, loses its lubricating characteristics, whether due to mileage, downtime or hours of use. As for gearboxes, without contact with fuel and the outside environment, it is...

Lawnmower: Murray 42" 31P777 (2010) Grass Catcher: QCT97 - 96071000100

Well, I already said in other topics that in my country the cost of a mini lawnmower is very high, as well as spare parts or accessories and in the case of a collector it can reach almost half of the entire machine. The solution is to make one or buy a used one in good condition... and I was...

Here we don't have any air-cooled ones and the powers are varied for work and even ready for competitions on muddy trails, big obstacles, big slopes... I think that cooling is not a big problem to use it as a lawn mower .

Oops! CraigH, do you have one and use it as a lawn mower, or did you just find it interesting? I'm still studying the use of an ATV...say something.

I have seen many implements for an ATV... some creative and some ready by the industry. As an advantage I see two important points (in my case)... The first is the low maintenance cost (many parts come from motorcycles) and a second use inside the farm is mobility with more safety and speed. As...

This has already been resolved... here the normal diesel is added 12% biodiesel, a small part from reused frying oils and most produced from direct sources according to the region. North: palm (dendê) and babassu; South, Southeast and Midwest: soybeans, sunflowers and peanuts; Northeast: castor...

Around here we use this oil as biodiesel, produced after being used in frying. Much cheaper, less polluting and with the same efficiency as regular diesel.

I was wrong with regard to the cost of producing synthetics... in fact they are produced from additional processes to obtain so-called mineral oils (obtained in the first stratification of crude oil), so they add more value to their production and consequently higher final cost of the product. A...

I partially agree with you and would like more information on making a synthetic... but as far as I know semi-synthetics are just a mixture of two different compounds, one mineral and one synthetic + additives. When you talk about benefits, what exactly are you referring to? Of course it's not...

Well, I see this as a standard test for everyone... if the test was not satisfactory the oil manufacturers themselves would make a fair complaint or denunciation. I don't know the 3 ball test and I don't even have a way to analyze ash content... do you? Tell us how. Comparing the evolution of...

It depends on where you look for the information... if you look with vendors (or their media), the chances of being misled is great. Believing in "magnetic molecular", "XPTO formula", "high tech", etc... if everything were true, it would have received a higher rating...

In fact there is a lot of confusion, but I wouldn't say that... There are only two oil bases: mineral and synthetic The mineral is 100% petroleum-derived, with additives Semi-synthetic is a mix of mineral + synthetic (created in laboratory), with additives The synthetic is 100% synthetic...