Granberg Grind-N-Joint Bar Mounted 12 Volt Chain Grinder

Great sharpener..BUT don't buy this in Europe because you can't get replacement grinding stones for this granberg sharpener anywhere. I got one and it's basically useless to me because of this .

The sharpener will return your sawchain to razor sharpness, saves gas and wear on your saw. I use Oregon 72LGX chain on my small 5hp saw and the Stihl Rollermatic on the 10hp MS880, both chains have different angles, but both pull shoelaces from the wood, like hot butter. Whether you only prune your yard trees or a professional arborist or logger, this little sharpener will do the job in the shop or field. I get fast straight cuts after sharpening, and if you have ever hit a stone, insulator, lag bolt or otherwise chipped your sawchain, you know that afterwards, the kerf becomes curved as the chain cuts asymmetrically, in a few minutes, depending on the damage, chain length and hardness, the Grandberg does the restoration without burning your chain and destroying its temper like the disk grinders do. Please note that I have not referred to this sharpener as a grinder!

This is the best sharpener for a great price , very pleased how it works , it's quite , sharpend the chain like new or better, . I never was good at sharpening chainsaw chains and going through slot of chains cause of being crooked , uneven , this sharpener gets it even with the right angle , and with ease , easy set up , highly recommended this sharpener.

So, I needed to sharpen three chainsaw blades. Looked on YouTube for ideas. Some were Dremel knock offs with a grinder guide, some were round files with a guide. This one intrigued me because it clamped to the chain guide, it had a guide rod, and the angle could be adjusted as needed. The grinder/motor is like a dremel in the way the bit attaches, but it is permanently attached to the guide system. The one thing I didn’t realize was the power cord is wired to hook up to the posts of a 12v battery with no way to plug it into a wall socket. I’m guessing this was done do you could take the sharpener with you to a remote area and use your vehicle battery to run it. I just happen to have a trolling battery sitting around the garage, so I used that. Something to be aware of. It was the most expensive of the choices, but looked to be the least frustrating to use, which is my most important consideration. I bought it and quickly realized it was more complicated than it first looked. The instructions were not very helpful as I felt I needed an engineering degree to make sense of them. A few frustrating minutes later, I got back on YouTube to watch a tutorial made by the company. That helped immensely. After getting it setup correctly on my chainsaw, it was then a matter of practicing with it until I became comfortable using it. I was then able to sharpen all three blades and bring them back to their original sharpness. So, would I recommend it? Yes, I would. Once I got past the learning curve, it was a fast and accurate way to sharpen the blades.

Grinder works great on 3/8 chain bars and little tight to get on the .403 chain bar but sharpens great Seems to cut pretty fast and stays sharp

Pros: Makes chain links razor sharp, much better than free-handing the Dremel tool electric sharpeners that I've used most of my life. Allows for consistent sharpening angles and depths using several points of adjustment. Cons: The hex head screws for the chain stays vibrate loose during operation so make sure you're over a surface where you can pick them back up. They're only hand-tightened so they will come out with the continuous vibration. This requires a 12 VDC power source, those power supplies are relatively cheap and worth it for me since I'm not going to use a car battery unless I'm out in the woods for an extended period. The plastic motor housing doesn't dissipate heat very well, so you may want to wait a few minutes as you're changing to the other of the bar to let it cool. Otherwise, you may shorten the life of the motor. The depth stop gets in the way of the wing nut used to set the cut angle. Unless you have small fingers (unlikely for most men) this will be a bit frustrating.