[Updated] Lawn Mower Blade Sharpener 15°-45° Adjustable Frame with Ball Bearing Manufacture Handle for Right & Left Hand Blades, Use with Angle Grinder, Black

Came fully assembled (who even does that anymore?) 4 different stems included to fit the Handle threads of most any 4-4.5" angle grinder. I mounted mine on a couple pcs of scrap wood, so I can use this while temporarily attached in a vise. Who wants to tie up bench real estate for a sharpening jig, that only gets used once every 2 or 3 months. Works fine, to keep a consistent angle grind, a little sloppy in the articulated joints, but acceptable. Works freely without any resistance... You can tighten the joint bolts, and lessen the (minor) side to side slop, but then it fights you with a little with resistance during use. I assumed 30 degrees would be the normal angle to set. but my blades were closer to 35. You can't really set it to "just any" degree angle. There are notches within the adjustments. Meaning you can't set it to 32 or 37 degrees (easily). Only just the notched 5 degree increments. just match what you already have on your blades, and keep a wet sponge nearby, to you can keep the blade from getting too HOT. Warm is ok, but getting the blade really hot will take the temper out of the metal, and then the blades wouldn't be as hardened, and lose their edge PDQ. Minimal (less) grinding is way better for you, the blades & your Flap disc too. (I use a 40 Grit) This thing is kind of pricey for what it is, and I wouldn't have bought it if I only had ONE mower, but I have many mowers, and most of them have many blades. A nice jig unit, and I won't miss the dropping off, and remembering to go pay & pick up the blades anymore. I keep my blades sharp, so I can mow faster, with out the re-runs for missed patches, and try not to intentionally run over too many blade edge wrecking objects. Pick up the rocks and sticks, or you will be running the same ones over again next week.

Not the easiest thing to use but reasonable install and setup. One caution: REALLY tighten the grinder angle set screw, hand tight won't do it. Had to use pliers on thumbscrew to keep it from lossening up and changing angle. Otherwise, works pretty good and should work with a variety of 4-1/2" and 7" grinders. Also recommended, check your grinding angle against a new blade. I thought my blades were 35° and I was having to grind ALOT to get them sharp. Turns out they we ground to 40°. Went much faster after that change. Always check blade balance after sharpening (wall mounted balancer recommended due to increased accuracy and sensitivity). Recommended.

So I've been sharpening my mower blades for years using bench grinders and a nail for balance. I recently heard about these new flapper wheel grinding disc style sharpeners, so I thought maybe I should move into this century, with technology. First I will say it's easy to assembly, functions as it's intended to and with its different anchor shafts, should fit most grinders on the market. I know it fit my new Metabo, that I bought for this task. You don't need a special grinder, just one that hold the flapper / sandpaper grinding discs. I wouldn't use standard grinding discs, as they might shatter and/ or cut too fast. This is about making multiple passes and losing as little metal as possible. In fact it's a lot easier to balance afterwards, versus with the grinder. So why 4 stars? The angle indentation markers it comes with don't seem to make sense. I set them for what the manufacturer of my blades tells me they are and this things angle adjustment seems to be nearly suggestions. I end up setting it and then making a fast pass, to see if it needs to be adjusted. Once set, it fairly straight forward. The arm holds the grinder at that angle and all you do is lift and glide it onto the blade and push straight through and lift at the end- repeat. Like I said, super easy to get balanced. Id say it cut down my sharpening times by half, from using a bench grinder. But here is the second caveat, it doesn't seem to be sharp enough. I recently cut my grass with these newly sharpened high-lift blades and found too many single strands for my liking. Even with my blades nearing the end of last season, previously being sharpened by a bench grinder, they still left my grass flush with maybe one or two stragglers. This years first cut wasn't as good. Maybe I need to practice more and see if it's me, but you can only make so many passes and fear heating the blade and making it brittle. Not good for a yard with a lot of hidden rocks. I'd say if you catch this on sale, already have a grinder and sandpaper flapper disc, then give it a shot. It's a 100% better than those things you attach to your drill and hope it doesn't blow apart with you sitting under a close deck.

There aren’t enough videos on how to use this blade sharpener as you might like, but once you figure it out (which was pretty easy) it works great! Now I sharpen a set of 3 law mower blades in 30 minutes. The blades are even and set exactly at 40 degrees. I fastened mine onto a length of 2x4 and then clamped that in a vise, so I can put it away when not in use.

Worth every penny! Very high-quality! This thing makes me want to volunteer to sharpen mower blades for my entire neighborhood it’s so easy and oddly enjoyable to use.. I will likely sharpen my blade several times a season now versus unnecessarily changing my blade every season. The quality of cut for your lawn is dramatically better with a sharp blade, especially if you have any tougher grasses. Once blades start to get dull, they essentially shatter the edge of the grass blade instead of cut it, leaving Browning and fuzzed edges on the blades, especially with tougher grasses, or if you have any crab grass. You can see the end result in the last image. I’m not sure if I should cut my lawn or a Tomahawk steak with this thing. I have an ego mower, and for that they recommend a cutting angle of 30 to 35°. I started with 30 but 35 seem to match the original bevel better. This tool will ensure an accurate even blade angle. I also recommend using an 80 grit versus the 60 grit disc a lot of Youtubers recommend. It’s a little finer polish, but more importantly you’ll take less material off the blade with a finer grit. It’s still only takes a matter of minutes to make the blade look better than New.

OMG! Where this little tool has been before I knew it about it? I found this little tool after I saw a post on a Facebook group about this tool, I’ve been using the RBG712 which if you know it is a heavy and bulky blade sharpener, we do lawn services for a living and sometime blades lost their sharp really soon and I was looking for something that I can have on our trailer to sharp the blades and I finally found it, not only it is going to be my trailer setup it is going to replace the heavy RBG I had at home I love this tool, just try different angles for your blade and try to go straight so you can have a nice blade angle, I wish they can make this a clamp instead of the screws I don’t want to have this tool all the time on my workbench but it makes sense to have it secure to avoid any injury, I used it with the clamp and it works good, love this tool! Highly recommend, looks nice, feels like a good quality materials, don’t think just buy it!

I like it. I used to sharpen my tractor finish mower blades in a vise “eyeballing” the edge my grinder was creating. This device helps create a smoother, more uniform edge. Although I am not mechanically minded I was able to unbox and assemble it within a few minutes. I must admit that after assembly and before attaching the grinder and blade I did not see how it would work. The arm seemed to move in an awkward path. Once blade and grinder were attached, it worked as designed. I will also use it with my zero turn mower blades.

I purchased this to sharpen the blades on my Honda HRX217HYA lawn mower with the twin blade mulching system. I had always just used a file to sharpen the blades and I am sure that it was not very preceise at all. I have two sets of blades that I alternate. I saw this system and after watching some YouTube videos, I decided to give it a try. I mounted the lower angle piece to a 2x4 and clamped the 2x 4 into my Workmate bench and set the first blade into the unit. I did need to adjust the 4 bolts that clamp the blade onto the sharpener since they were too low for the bigger blade to fit in. After adjusting the 4 bolts so the blade was secure I clamped it in and set the angle adjustment to 35 degrees. I only had to do about 5 passes with my angle grinder and a 60 grit flapper disc before the blade had a nice sharp edge. I put the blade on my balancer and just needed to make one more pass on the heavy side to get it in balance. After I finished the first blade I readjusted the 4 holding bolts for the smaller blade and sharpened it. Like the bigger blade, I needed to adjust the balance. The blades had kind of a slight ragged edge so I just ran a file once over the edge to remove the burrs. Like others have stated, this "Updated" model does not seem to have a ball bearing in the pivoting section where the two beams connect, even though the picture and description shows it has one. This is a disappointment, but I guess "Upated" does not always mean better, just different. This erroneous description is the reason I took off a star. I liked that it came with the 4 lag bolts to secure it to the 2x4. I have a Hercules 4 1/2" angle grinder and one of the provided adapter screws fit the grinder perfectly. For the money it works good, and since I only have one mower and two sets of blades it fills my needs.